/* === CSS Variables (Claude Brand Colors) === */
:root {
  --primary: #D97757;
  --primary-dark: #B8542A;
  --primary-light: #FDF0E8;
  --accent: #C96B3A;
  --accent-dark: #A0491E;
  --bg: #FAF9F7;
  --bg-dark: #F2EDE6;
  --white: #FFFFFF;
  --text: #1C1410;
  --text-muted: #A0522D;
  --text-sub: #6B5B4E;
  --border: rgba(217, 119, 87, 0.15);
  --shadow: 0 4px 24px rgba(217, 119, 87, 0.12);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --radius: 16px;
  --radius-sm: 8px;
  --radius-xs: 4px;
}

/* === Reset & Base === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Noto Sans JP', 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

img { max-width: 100%; height: auto; display: block; }

/* === Scroll Progress Bar === */
.scroll-indicator {
  position: fixed; top: 0; left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  z-index: 300; width: 0%;
  transition: width 0.1s linear;
}

/* === Navigation === */
#mainNav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 200;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.05);
  transition: box-shadow 0.3s;
}
#mainNav.scrolled { box-shadow: 0 2px 16px rgba(0, 0, 0, 0.1); }
.nav-inner {
  max-width: 1100px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 24px;
}
.nav-logo {
  font-size: 0.88rem; font-weight: 700; color: var(--text);
  text-decoration: none; display: flex; align-items: center; gap: 8px;
  white-space: nowrap;
}
.nav-logo-icon { font-size: 20px !important; color: var(--primary); }
.nav-cta { display: flex; gap: 8px; align-items: center; flex-shrink: 0; }
.nav-btn {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 7px 14px; border-radius: var(--radius-sm);
  font-size: 0.78rem; font-weight: 600;
  color: var(--text-sub); border: 1px solid var(--border);
  background: var(--white); text-decoration: none;
  transition: all 0.2s; white-space: nowrap;
}
.nav-btn:hover { border-color: var(--primary); color: var(--primary); }
.nav-btn--primary {
  background: linear-gradient(150deg, #D06030 0%, #AA4418 100%);
  color: var(--white); border-color: transparent;
  box-shadow: 0 3px 12px rgba(160, 60, 20, 0.46), inset 0 1px 0 rgba(255,255,255,0.30);
}
.nav-btn--primary:hover {
  background: linear-gradient(150deg, #DA6B38 0%, #BB4E22 100%);
  border-color: transparent; color: var(--white);
  transform: translateY(-3px);
  box-shadow: 0 7px 20px rgba(160, 60, 20, 0.56), inset 0 1px 0 rgba(255,255,255,0.30);
  text-decoration: none;
}
.nav-btn .material-icons { font-size: 15px; }

/* === Hero === */
.hero {
  background: var(--bg);
  padding: 72px 24px 48px;
  display: flex; flex-direction: column; align-items: center;
  overflow: hidden;
}
.hero-kv {
  width: 100%; padding: 0 24px;
  box-sizing: border-box;
}
.hero-kv-image {
  width: 100%; max-width: 1100px; height: auto;
  display: block; margin: 0 auto;
  border-radius: var(--radius);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
}

/* === Buttons === */
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 28px; border-radius: 50px;
  background: var(--accent); color: #fff;
  font-size: 0.95rem; font-weight: 700; text-decoration: none;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 20px rgba(201, 107, 58, 0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(201, 107, 58, 0.5); text-decoration: none; }
.btn-outline {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 28px; border-radius: 50px;
  border: 1.5px solid rgba(255,255,255,0.4); color: rgba(255,255,255,0.85);
  font-size: 0.95rem; font-weight: 600; text-decoration: none;
  transition: border-color 0.2s, color 0.2s;
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }
.btn-sm {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 18px; border-radius: 50px; border: none; cursor: pointer;
  background: var(--primary-light); color: var(--primary);
  font-size: 0.85rem; font-weight: 600; text-decoration: none;
  transition: background 0.2s;
}
.btn-sm:hover { background: var(--primary); color: #fff; text-decoration: none; }

/* === Layout === */
.section-inner {
  max-width: 1100px; margin: 0 auto; padding: 0 24px;
}
section { padding: 72px 0; }
section.bg-white { background: var(--white); }
section.bg-dark { background: var(--bg-dark); }

.section-label {
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--primary); margin-bottom: 8px;
}
.section-title {
  font-size: clamp(1.35rem, 2.5vw, 2rem);
  font-weight: 700; line-height: 1.35;
  margin-bottom: 12px; word-break: keep-all;
}
.section-desc {
  font-size: 0.95rem; color: var(--text-sub);
  max-width: 100%; margin-bottom: 40px;
  line-height: 1.7;
}

/* === Portal Intro === */
.portal-intro {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: var(--primary-light);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px 22px;
  margin-bottom: 36px;
}
.portal-intro-icon {
  color: var(--primary);
  font-size: 20px;
  flex-shrink: 0;
  margin-top: 3px;
}
.portal-intro-body p {
  font-size: 0.88rem;
  color: var(--text-sub);
  line-height: 1.8;
  margin: 0;
}
.portal-intro-body p + p { margin-top: 6px; }
.portal-intro-body strong { color: var(--text); font-weight: 600; }

/* === Notice Block === */
.notice-block {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: var(--white);
  border: 1px solid var(--primary);
  border-left: 4px solid var(--primary);
  border-radius: 10px;
  padding: 18px 22px;
  margin-bottom: 32px;
  box-shadow: 0 2px 10px rgba(217, 119, 87, 0.1);
}
.notice-block-icon {
  color: var(--primary);
  font-size: 22px;
  flex-shrink: 0;
  margin-top: 2px;
}
.notice-block-body { flex: 1; }
.notice-block-title {
  font-size: 0.75rem; font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--primary); margin-bottom: 6px;
}
.notice-block-text {
  font-size: 0.875rem; color: var(--text-sub);
  line-height: 1.75; margin-bottom: 12px; margin: 0 0 12px;
}
.notice-block-action { display: flex; gap: 10px; flex-wrap: wrap; }

/* === Tab Navigation === */
.tab-nav-wrapper {
  background: var(--white);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 56px; z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}
.tab-nav {
  max-width: 1100px; margin: 0 auto;
  display: flex; overflow-x: auto;
  scrollbar-width: none; -ms-overflow-style: none;
  padding: 0 24px;
}
.tab-nav::-webkit-scrollbar { display: none; }
.tab-btn {
  display: flex; align-items: center; gap: 6px;
  padding: 16px 18px;
  font-size: 0.875rem; font-weight: 600;
  color: var(--text-sub); background: none; border: none;
  border-bottom: 3px solid transparent;
  cursor: pointer; white-space: nowrap;
  transition: color 0.2s, border-color 0.2s;
}
.tab-btn .material-icons { font-size: 18px; }
.tab-btn:hover { color: var(--primary); }
.tab-btn.active { color: var(--primary); border-bottom-color: var(--primary); }

/* === Tab Content === */
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* === Card Grid === */
.card-grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.card-grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card-grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }

/* === Card === */
.card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s, box-shadow 0.2s;
}
.card:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.card-icon {
  width: 44px; height: 44px; border-radius: var(--radius-sm);
  background: var(--primary-light);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 14px;
}
.card-icon .material-icons { color: var(--primary); font-size: 22px; }
.card-icon.accent { background: rgba(217, 119, 87, 0.1); }
.card-icon.accent .material-icons { color: var(--accent-dark); }
.card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 6px; }
.card p { font-size: 0.875rem; color: var(--text-sub); line-height: 1.7; }
.card-link-row {
  margin-top: 16px; padding-top: 14px;
  border-top: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
}

/* === Checklist === */
.checklist {
  list-style: none;
  display: flex; flex-direction: column; gap: 10px;
}
.checklist li {
  display: flex; align-items: flex-start; gap: 10px;
  font-size: 0.925rem;
}
.checklist li .material-icons {
  font-size: 18px; color: var(--accent-dark);
  flex-shrink: 0; margin-top: 2px;
}

/* === Schedule Table === */
.schedule-list {
  display: flex; flex-direction: column; gap: 12px;
}
.schedule-item {
  display: flex; align-items: center; gap: 16px;
  padding: 16px 20px;
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}
.schedule-date {
  font-size: 0.8rem; font-weight: 700; color: var(--primary);
  white-space: nowrap;
}
.schedule-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--accent); flex-shrink: 0;
}
.schedule-item.past .schedule-dot { background: #9CA3AF; }
.schedule-item.past { opacity: 0.6; }
.schedule-label {
  font-size: 0.9rem; font-weight: 600; flex: 1;
}
.schedule-badge {
  font-size: 0.7rem; font-weight: 700; padding: 3px 10px;
  border-radius: 50px; white-space: nowrap;
}
.badge-upcoming { background: rgba(217, 119, 87, 0.12); color: var(--accent-dark); }
.badge-past { background: #F3F4F6; color: #6B7280; }

/* === DAY Card === */
.day-card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.day-card {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
  transition: transform 0.25s, box-shadow 0.25s;
}
.day-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.18);
}
.day-card-header {
  background: linear-gradient(140deg, #E07A4A 0%, #D97757 50%, #C96B3A 100%);
  padding: 36px 32px 32px;
  position: relative;
  overflow: hidden;
}
.day-card-header::before {
  content: '';
  position: absolute;
  top: -40px; right: -40px;
  width: 160px; height: 160px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
  filter: blur(30px);
}
.day-card-header--2 {
  background: linear-gradient(140deg, #C96B3A 0%, #B8542A 50%, #A0491E 100%);
}
.day-label {
  display: inline-block;
  font-size: 0.95rem; font-weight: 800; letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #FFFFFF;
  background: rgba(255, 255, 255, 0.2);
  border: 1.5px solid rgba(255, 255, 255, 0.5);
  padding: 6px 18px; border-radius: 50px;
  margin-bottom: 18px;
}
.day-card-header--2 .day-label {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.4);
}
.day-title {
  font-size: clamp(1.3rem, 2.5vw, 1.7rem);
  font-weight: 700; color: #FFFFFF;
  line-height: 1.25; margin-bottom: 10px;
  word-break: keep-all;
}
.day-subtitle {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.6;
}
.day-card-body {
  background: var(--white);
  padding: 28px 32px 32px;
}
.day-desc {
  font-size: 0.9rem; color: var(--text-sub);
  line-height: 1.8; margin-bottom: 20px;
}
.day-topics {
  list-style: none;
  display: flex; flex-direction: column; gap: 10px;
}
.day-topics li {
  display: flex; align-items: center; gap: 10px;
  font-size: 0.875rem; font-weight: 600; color: var(--text);
}
.day-topics li .material-icons {
  font-size: 18px; color: var(--primary); flex-shrink: 0;
}

/* === Day Card Actions === */
.day-card-actions {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.day-card-sub-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.day-card-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 18px; border-radius: 50px;
  font-size: 0.85rem; font-weight: 600;
  cursor: pointer; border: none; font-family: inherit;
  transition: all 0.2s; white-space: nowrap;
  text-decoration: none;
}
.day-card-btn--main {
  background: linear-gradient(150deg, #D06030 0%, #AA4418 100%);
  color: #fff; align-self: flex-start;
  box-shadow: 0 4px 16px rgba(160, 60, 20, 0.48), inset 0 1px 0 rgba(255,255,255,0.30);
}
.day-card-btn--main:hover {
  background: linear-gradient(150deg, #DA6B38 0%, #BB4E22 100%);
  color: #fff; text-decoration: none;
  transform: translateY(-3px);
  box-shadow: 0 9px 26px rgba(160, 60, 20, 0.56), inset 0 1px 0 rgba(255,255,255,0.30);
}
.day-card-btn--sub {
  background: var(--primary-light); color: var(--primary);
  font-size: 0.8rem; padding: 8px 14px;
}
.day-card-btn--sub:hover { background: var(--primary); color: #fff; text-decoration: none; }

@media (max-width: 768px) {
  .portal-intro { padding: 14px 16px; gap: 10px; margin-bottom: 28px; }
  .portal-intro-body p { font-size: 0.84rem; }
  .day-card-grid { grid-template-columns: 1fr; gap: 20px; }
  .day-card-header { padding: 28px 24px 24px; }
  .day-card-body { padding: 22px 24px 26px; }
}

@media (max-width: 480px) {
  .day-card-actions { gap: 8px; }
  .day-card-sub-actions { flex-direction: column; }
  .day-card-btn--main { align-self: stretch; justify-content: center; }
  .day-card-btn--sub { justify-content: center; }
}

/* === Loading State === */
.load-msg {
  display: flex; align-items: center; gap: 8px;
  padding: 24px; color: var(--text-sub); font-size: 0.9rem;
}
.load-msg .material-icons { font-size: 20px; opacity: 0.6; }
.load-msg--error { color: #B45309; }
.load-msg--error .material-icons { color: #B45309; }

/* === Video Card === */
.video-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s, box-shadow 0.2s;
  display: flex; flex-direction: column;
}
.video-card:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.video-player-wrapper {
  background: #000;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  overflow: hidden;
  line-height: 0;
}
.video-player-wrapper video {
  width: 100%;
  display: block;
  aspect-ratio: 16 / 9;
  max-height: 280px;
  object-fit: contain;
  background: #000;
}
.video-body { padding: 20px; flex: 1; display: flex; flex-direction: column; }
.video-meta {
  display: flex; align-items: center; gap: 6px;
  font-size: 0.75rem; color: var(--text-sub); margin-bottom: 10px;
}
.video-meta .material-icons { font-size: 14px; }
.video-card h3 { font-size: 0.95rem; font-weight: 700; margin-bottom: 8px; }
.video-card p { font-size: 0.85rem; color: var(--text-sub); flex: 1; }
.video-todo {
  margin-top: 14px; padding: 10px 14px;
  background: rgba(217, 119, 87, 0.07);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-xs) var(--radius-xs) 0;
  font-size: 0.8rem; color: var(--text);
}
.video-todo strong { color: var(--accent-dark); }
.video-card-footer {
  padding: 14px 20px; border-top: 1px solid var(--border);
}

/* === Setup Page === */
.setup-meta-cards {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px;
  margin-bottom: 40px;
}
.setup-meta-card {
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 16px;
  box-shadow: var(--shadow-sm);
}
.setup-meta-card .meta-label {
  font-size: 0.7rem; font-weight: 700; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 6px;
}
.setup-meta-card .meta-value {
  font-size: 0.875rem; font-weight: 600; color: var(--text);
}
.content-area {
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 40px;
  box-shadow: var(--shadow-sm);
}

/* Article HTML styles (差し込み記事のデザイン) */
.setup-article h2 { font-size: 1.4rem; font-weight: 700; margin-bottom: 24px; padding-bottom: 12px; border-bottom: 2px solid var(--border); }
.setup-article h3 { font-size: 1.05rem; font-weight: 700; margin-top: 32px; margin-bottom: 10px; color: var(--primary); }
.setup-article p { font-size: 0.925rem; margin-bottom: 12px; }
.setup-article ul, .setup-article ol { padding-left: 20px; margin-bottom: 12px; }
.setup-article li { font-size: 0.925rem; margin-bottom: 6px; }
.setup-article pre {
  background: #1C1410; color: #F5E6D8;
  padding: 16px 20px; border-radius: var(--radius-sm);
  overflow-x: auto; font-size: 0.85rem;
  margin: 12px 0 20px;
}
.setup-article code {
  background: var(--primary-light); color: var(--primary-dark);
  padding: 2px 6px; border-radius: 4px;
  font-size: 0.875em;
}
.setup-article pre code { background: transparent; color: inherit; padding: 0; }
.setup-article a { color: var(--primary); text-decoration: underline; }

/* === Glossary === */
.glossary-search-bar {
  display: flex; align-items: center; gap: 10px;
  background: var(--white); border: 1.5px solid var(--border);
  border-radius: 50px; padding: 10px 20px;
  margin-bottom: 32px; max-width: 480px;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.2s;
}
.glossary-search-bar:focus-within { border-color: var(--primary); }
.glossary-search-bar .material-icons { color: var(--text-sub); font-size: 20px; }
.glossary-search-bar input {
  border: none; outline: none; background: none;
  font-family: inherit; font-size: 0.9rem; width: 100%;
  color: var(--text);
}
.glossary-category { margin-bottom: 40px; }
.glossary-cat-title {
  font-size: 0.8rem; font-weight: 700; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--primary);
  margin-bottom: 14px;
}
.term-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.term-card {
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 18px 20px;
  box-shadow: var(--shadow-sm);
}
.term-card dt { font-size: 0.95rem; font-weight: 700; margin-bottom: 6px; }
.term-card dd { font-size: 0.85rem; color: var(--text-sub); line-height: 1.7; }
.term-card dd p { margin: 0; }
.term-card dd p + p,
.term-card dd p + ul,
.term-card dd p + ol,
.term-card dd ul + p,
.term-card dd ol + p { margin-top: 8px; }
.term-ul { list-style: disc; margin: 6px 0 0 1.2em; padding: 0; }
.term-ul li { font-size: 0.85rem; color: var(--text-sub); line-height: 1.6; }
.term-code { margin-top: 8px; background: var(--bg-dark); border-radius: var(--radius-xs); padding: 10px 14px; overflow-x: auto; }
.term-code code { font-family: 'SFMono-Regular', Consolas, monospace; font-size: 0.78rem; color: var(--text); white-space: pre; }
.term-card.hidden { display: none; }
.glossary-intro {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px 24px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 18px;
  font-size: 0.88rem;
  color: var(--text-sub);
  line-height: 1.8;
}
.glossary-intro p { margin: 0 0 10px; }
.glossary-intro p:last-child { margin-bottom: 0; }
.glossary-intro ul { list-style: disc; margin: 4px 0 10px 1.4em; padding: 0; }
.glossary-intro li { margin-bottom: 4px; }
.glossary-intro strong { color: var(--text); }
.glossary-intro .term-code {
  margin: 12px 0;
  border-left: 3px solid var(--primary);
  border-radius: 0 4px 4px 0;
}
.glossary-intro .term-code code { font-size: 0.8rem; }
@media (max-width: 600px) {
  .glossary-intro { padding: 16px 18px; }
  .glossary-intro .term-code { overflow-x: auto; }
}
.yt-play-overlay { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; background: rgba(0,0,0,0.12); transition: background 0.2s; }
.yt-facade:hover .yt-play-overlay { background: rgba(0,0,0,0.25); }

/* === FAQ Controls === */
.faq-controls {
  display: flex; flex-direction: column; gap: 12px;
  margin-bottom: 28px;
}
.faq-search-wrap {
  position: relative; display: flex; align-items: center;
}
.faq-search-icon {
  position: absolute; left: 12px;
  color: var(--text-sub); font-size: 20px; pointer-events: none;
}
.faq-search {
  width: 100%;
  padding: 10px 16px 10px 42px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--white);
  font-family: inherit; font-size: 0.9rem; color: var(--text);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.faq-search::placeholder { color: var(--text-sub); opacity: 0.7; }
.faq-search:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(217, 119, 87, 0.15);
}
.faq-cat-tabs {
  display: flex; flex-wrap: wrap; gap: 8px;
}
.faq-empty {
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  padding: 56px 24px;
  color: var(--text-sub); font-size: 0.9rem; text-align: center;
}
.faq-empty .material-icons { font-size: 40px; color: var(--text-muted); opacity: 0.6; }

/* === FAQ === */
.faq-category { margin-bottom: 36px; }
.faq-cat-title {
  font-size: 0.8rem; font-weight: 700; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--primary); margin-bottom: 12px;
}
.faq-item {
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius-sm); margin-bottom: 8px;
  box-shadow: var(--shadow-sm); overflow: hidden;
}
.faq-item summary {
  list-style: none; cursor: pointer;
  padding: 16px 20px;
  font-size: 0.9rem; font-weight: 600;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  transition: color 0.2s;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: 'expand_more'; font-family: 'Material Icons'; font-size: 20px;
  color: var(--text-sub); flex-shrink: 0;
  transition: transform 0.2s;
}
.faq-item[open] summary::after { transform: rotate(180deg); }
.faq-item[open] summary { color: var(--primary); }
.faq-answer {
  padding: 0 20px 16px;
  font-size: 0.875rem; color: var(--text-sub); line-height: 1.75;
}
.faq-answer p { margin: 0; }
.faq-answer p + p { margin-top: 8px; }
.faq-answer code {
  background: var(--primary-light); color: var(--primary-dark);
  padding: 2px 6px; border-radius: 4px; font-size: 0.85em;
}
.faq-source {
  font-size: 0.75rem; color: var(--text-muted);
  margin-top: 10px !important; font-style: italic; opacity: 0.8;
}
.faq-table {
  width: 100%; border-collapse: collapse; margin: 10px 0; font-size: 0.82rem;
}
.faq-table th, .faq-table td {
  border: 1px solid var(--border); padding: 6px 10px; text-align: left;
}
.faq-table th {
  background: var(--primary-light); color: var(--primary-dark); font-weight: 600;
}
.faq-answer .term-ul { margin-top: 6px; }
.faq-answer .term-code { margin-top: 10px; }

/* === Archive Card === */
.archive-card {
  display: flex; align-items: center; gap: 16px;
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px 24px; margin-bottom: 12px;
  transition: box-shadow 0.2s, transform 0.2s;
}
.archive-card:hover { box-shadow: var(--shadow); transform: translateY(-1px); }
.archive-card-icon {
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--primary-light); display: flex; align-items: center;
  justify-content: center; flex-shrink: 0; color: var(--primary);
}
.archive-card-body { flex: 1; min-width: 0; }
.archive-card-body h3 { font-size: 1rem; font-weight: 600; color: var(--text); margin: 0 0 4px; }
.archive-card-body p { font-size: 0.85rem; color: var(--text-sub); margin: 0; line-height: 1.6; }
.archive-card-action { flex-shrink: 0; }

/* === Archive YouTube Thumbnail Cards === */
.archive-yt-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.archive-yt-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s, transform 0.2s;
}
.archive-yt-card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.archive-yt-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: #1C1410;
}
.archive-yt-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.archive-yt-date {
  position: absolute; top: 10px; left: 10px;
  background: rgba(28, 20, 16, 0.72);
  color: #fff; font-size: 0.72rem; font-weight: 600;
  padding: 3px 10px; border-radius: 50px;
  letter-spacing: 0.02em;
}
.archive-yt-body { padding: 20px 22px; }
.archive-yt-badge {
  display: inline-block;
  background: var(--primary-light); color: var(--primary-dark);
  font-size: 0.72rem; font-weight: 700;
  padding: 3px 10px; border-radius: 50px;
  margin-bottom: 10px; letter-spacing: 0.02em;
}
.archive-yt-body h3 {
  font-size: 1rem; font-weight: 700; color: var(--text);
  margin: 0 0 8px; line-height: 1.55;
}
.archive-yt-body p {
  font-size: 0.85rem; color: var(--text-sub);
  margin: 0 0 16px; line-height: 1.65;
}
.archive-note {
  display: inline-block; margin-top: 6px;
  font-size: 0.82rem; color: var(--text-muted);
}
.archive-subsection {
  margin: 48px 0 20px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--primary-light);
}
.archive-subsection:first-child { margin-top: 0; }
.archive-sub-label {
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--primary); margin: 0 0 6px;
}
.archive-sub-title {
  font-size: 1.2rem; font-weight: 700; color: var(--text);
  margin: 0 0 4px; line-height: 1.4;
}
.archive-sub-desc {
  font-size: 0.85rem; color: var(--text-sub);
  margin: 6px 0 0; line-height: 1.65;
}

/* === Webinar Card === */
.webinar-card {
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px 28px; margin-bottom: 16px;
  display: flex; align-items: flex-start; justify-content: space-between; gap: 20px;
  transition: box-shadow 0.2s, transform 0.2s;
}
.webinar-card:hover { box-shadow: var(--shadow); transform: translateY(-1px); }
.webinar-card-body { flex: 1; min-width: 0; }
.webinar-date {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 0.78rem; color: var(--text-muted); margin-bottom: 8px;
}
.webinar-date .material-icons { font-size: 14px; }
.webinar-title {
  font-size: 1rem; font-weight: 600; color: var(--text);
  line-height: 1.65; margin: 0 0 8px;
  word-break: keep-all; overflow-wrap: anywhere;
}
.webinar-desc { font-size: 0.85rem; color: var(--text-sub); margin: 0; line-height: 1.6; }
.webinar-card-action { flex-shrink: 0; align-self: center; }
.webinar-preparing {
  font-size: 0.78rem; color: var(--text-muted);
  background: var(--bg-dark); border-radius: var(--radius-sm);
  padding: 5px 12px; display: inline-block;
}

/* === Video Category Filter === */
.video-category-filter {
  display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 24px;
}
.video-category-group { margin-bottom: 52px; }
.video-category-group:last-child { margin-bottom: 0; }
.video-category-heading {
  font-size: 1rem; font-weight: 700; color: var(--text);
  margin: 0 0 4px;
  padding-bottom: 0;
  border-bottom: none;
}
.supplement-section-header {
  display: flex; align-items: flex-start; gap: 12px;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--primary-light);
}
.supplement-section-icon {
  font-size: 22px; color: var(--primary);
  flex-shrink: 0; margin-top: 1px;
}
.supplement-section-icon--setup { color: var(--accent-dark); }
.supplement-heading--setup { color: var(--accent-dark); }
.supplement-section-desc {
  font-size: 0.83rem; color: var(--text-sub);
  margin: 5px 0 0; line-height: 1.6;
}

/* === Link Card === */
.link-type-filter {
  display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 24px;
}
.filter-btn {
  padding: 6px 16px; border-radius: 50px;
  border: 1.5px solid var(--border); background: var(--white);
  font-size: 0.8rem; font-weight: 600; cursor: pointer;
  color: var(--text-sub);
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}
.filter-btn:hover, .filter-btn.active { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }
.link-card {
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 20px 24px;
  box-shadow: var(--shadow-sm);
  display: flex; align-items: flex-start; gap: 16px;
  transition: transform 0.2s, box-shadow 0.2s;
}
.link-card:hover { transform: translateY(-1px); box-shadow: var(--shadow); }
.link-card-icon {
  width: 40px; height: 40px; border-radius: var(--radius-sm);
  background: var(--primary-light);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.link-card-icon .material-icons { font-size: 20px; color: var(--primary); }
.link-card-body { flex: 1; min-width: 0; }
.link-card-body h3 { font-size: 0.95rem; font-weight: 700; margin-bottom: 4px; }
.link-card-body p { font-size: 0.85rem; color: var(--text-sub); margin-bottom: 8px; }
.link-card-meta {
  display: flex; gap: 12px; align-items: center;
  font-size: 0.75rem; color: var(--text-sub);
}
.link-type-badge {
  padding: 2px 10px; border-radius: 50px;
  background: var(--primary-light); color: var(--primary);
  font-size: 0.7rem; font-weight: 700;
}
.link-card-action { flex-shrink: 0; }

/* === Wave Divider === */
.wave { line-height: 0; }
.wave svg { display: block; width: 100%; height: 70px; }

/* === Scroll Animation === */
.fi { opacity: 0; transform: translateY(16px); transition: opacity 0.55s ease, transform 0.55s ease; }
.fi.visible { opacity: 1; transform: translateY(0); }
.fi.delay-1 { transition-delay: 0.08s; }
.fi.delay-2 { transition-delay: 0.16s; }
.fi.delay-3 { transition-delay: 0.24s; }

/* === Responsive === */
@media (max-width: 900px) {
  .card-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .setup-meta-cards { grid-template-columns: repeat(2, 1fr); }
  .term-list { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-logo { font-size: 0.78rem; }
  .nav-cta { display: none; }
  .hero { padding: 68px 16px 32px; }
  section { padding: 48px 0; }
  .section-inner { padding: 0 16px; }
  .card-grid-2, .card-grid-3 { grid-template-columns: 1fr; }
  .card-grid-4 { grid-template-columns: 1fr; }
  .setup-meta-cards { grid-template-columns: repeat(2, 1fr); }
  .tab-btn { padding: 14px 14px; font-size: 0.8rem; }
  .tab-nav-wrapper { top: 52px; }
  .content-area { padding: 24px 16px; }
  .link-card { flex-direction: column; gap: 10px; }
  .archive-card { flex-direction: column; align-items: flex-start; gap: 12px; padding: 16px; }
  .archive-yt-grid { grid-template-columns: 1fr; }
  .webinar-card { flex-direction: column; gap: 14px; padding: 18px 16px; }
  .webinar-card-action { align-self: flex-start; }
  .webinar-title { font-size: 0.92rem; }
  .hero-kv { padding: 0; }
  .btn-primary, .btn-outline { justify-content: center; }
  .schedule-item { flex-wrap: wrap; gap: 8px; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 1.4rem; }
  .tab-btn .tab-label { display: none; }
  .tab-btn { padding: 14px 16px; }
  .setup-meta-cards { grid-template-columns: 1fr; }
}

/* ============================================================
   Navigation Redesign — Header Tab Links
   ============================================================ */
.hero-kv--sm { max-width: 760px; margin: 0 auto; }

.nav-tabs {
  display: flex; gap: 2px; align-items: center; flex-shrink: 0;
}
.nav-tab-link {
  display: inline-flex; align-items: center;
  padding: 6px 13px; border-radius: var(--radius-sm);
  font-size: 0.82rem; font-weight: 600;
  color: var(--text-sub); text-decoration: none;
  transition: color 0.2s, background 0.2s;
  white-space: nowrap;
}
.nav-tab-link:hover { color: var(--primary); background: var(--primary-light); text-decoration: none; }
.nav-tab-link.active { color: var(--primary); background: var(--primary-light); }

/* ============================================================
   Step Cards — トップページ 参加ステップ
   ============================================================ */
.step-cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.step-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.22s, box-shadow 0.22s;
}
.step-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.step-card-header {
  padding: 22px 24px 18px;
  background: linear-gradient(140deg, #F2EBE2 0%, #EDE0D4 100%);
  border-bottom: 1px solid var(--border);
}
.step-card--1 .step-card-header { background: linear-gradient(140deg, #FDEADE 0%, #F8D5C2 100%); }
.step-card--2 .step-card-header { background: linear-gradient(140deg, #FAE2D4 0%, #F0C9AE 100%); }
.step-number {
  display: inline-block;
  font-size: 0.68rem; font-weight: 800; letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--primary);
  background: rgba(217, 119, 87, 0.12);
  border: 1px solid rgba(217, 119, 87, 0.28);
  padding: 3px 12px; border-radius: 50px;
  margin-bottom: 10px;
}
.step-card--1 .step-number { color: var(--accent); background: rgba(201, 107, 58, 0.12); border-color: rgba(201, 107, 58, 0.28); }
.step-card--2 .step-number { color: var(--accent-dark); background: rgba(160, 73, 30, 0.12); border-color: rgba(160, 73, 30, 0.28); }
.step-card-title { font-size: 1.05rem; font-weight: 700; color: var(--text); margin: 0; line-height: 1.35; }
.step-card-body { padding: 18px 24px 22px; display: flex; flex-direction: column; gap: 14px; }
.step-card-list { list-style: none; display: flex; flex-direction: column; gap: 5px; margin: 0; padding: 0; }
.step-card-list li {
  font-size: 0.875rem; color: var(--text-sub);
  padding-left: 1.1em; position: relative; line-height: 1.6;
}
.step-card-list li::before { content: '·'; position: absolute; left: 0; color: var(--primary); font-size: 1.3em; line-height: 1; top: 0.1em; }
.step-card-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 10px 20px; border-radius: 50px;
  background: var(--primary); color: #fff;
  font-size: 0.855rem; font-weight: 600;
  cursor: pointer; border: none; font-family: inherit;
  transition: background 0.2s, transform 0.2s;
  width: 100%;
}
.step-card-btn:hover { background: var(--primary-dark); transform: translateY(-1px); }
.step-card-btn .material-icons { font-size: 16px; }

/* ============================================================
   Back Button
   ============================================================ */
.back-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px; border-radius: var(--radius-sm);
  background: none; border: 1.5px solid var(--border);
  font-size: 0.85rem; font-weight: 600; color: var(--text-sub);
  cursor: pointer; font-family: inherit;
  margin-bottom: 28px;
  transition: border-color 0.2s, color 0.2s;
}
.back-btn:hover { border-color: var(--primary); color: var(--primary); }
.back-btn .material-icons { font-size: 17px; }

/* ============================================================
   Archive Sub-Views
   ============================================================ */
.archive-view { display: none; }
.archive-view.active { display: block; }

.archive-hub-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.archive-hub-card {
  display: flex; align-items: center; gap: 18px;
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px 28px;
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: transform 0.22s, box-shadow 0.22s;
}
.archive-hub-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.archive-hub-card-icon {
  width: 52px; height: 52px; border-radius: var(--radius-sm);
  background: var(--primary-light);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.archive-hub-card-icon .material-icons { font-size: 26px; color: var(--primary); }
.archive-hub-card-icon--accent { background: rgba(217, 119, 87, 0.1); }
.archive-hub-card-icon--accent .material-icons { color: var(--accent-dark); }
.archive-hub-card-body { flex: 1; min-width: 0; }
.archive-hub-card-body h3 { font-size: 1.05rem; font-weight: 700; margin: 0 0 6px; }
.archive-hub-card-body p { font-size: 0.875rem; color: var(--text-sub); margin: 0; line-height: 1.65; }
.archive-hub-arrow { color: var(--text-sub); font-size: 18px; flex-shrink: 0; }

/* ============================================================
   DAY Page — STEP Sections
   ============================================================ */
.day-step-group { padding: 4px 0 0; }
.day-step-badge {
  display: inline-flex; align-items: center;
  font-size: 0.75rem; font-weight: 800; letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 4px 14px; border-radius: 50px;
  margin-bottom: 14px;
}
.day-step-badge--0 { background: var(--primary-light); color: var(--primary); border: 1.5px solid rgba(217,119,87,0.3); }
.day-step-badge--1 { background: rgba(217,119,87,0.12); color: var(--accent); border: 1.5px solid rgba(201,107,58,0.3); }
.day-step-badge--2 { background: rgba(160,73,30,0.1); color: var(--accent-dark); border: 1.5px solid rgba(160,73,30,0.25); }
.day-step-title {
  font-size: clamp(1.2rem, 2.2vw, 1.55rem);
  font-weight: 700; color: var(--text);
  margin: 0 0 10px; line-height: 1.35; word-break: keep-all;
}
.day-step-desc {
  font-size: 0.9rem; color: var(--text-sub);
  max-width: 560px; line-height: 1.75; margin: 0 0 22px;
}
.step-nav-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px; border-radius: 50px;
  background: linear-gradient(150deg, #D06030 0%, #AA4418 100%);
  color: #fff;
  font-size: 0.9rem; font-weight: 700;
  cursor: pointer; border: none; font-family: inherit;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 16px rgba(160,60,20,0.38), inset 0 1px 0 rgba(255,255,255,0.22);
}
.step-nav-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(160,60,20,0.50), inset 0 1px 0 rgba(255,255,255,0.22);
}
.step-nav-btn .material-icons { font-size: 18px; }

/* ============================================================
   Q&A Link Block
   ============================================================ */
.qa-link-block {
  display: flex; align-items: center; gap: 16px;
  background: var(--white); border: 1px solid var(--border);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius-sm);
  padding: 20px 24px; margin-top: 36px;
  box-shadow: var(--shadow-sm);
  flex-wrap: wrap;
}
.qa-link-icon { color: var(--primary); font-size: 28px; flex-shrink: 0; }
.qa-link-text { flex: 1; min-width: 180px; }
.qa-link-title { font-size: 0.95rem; font-weight: 700; color: var(--text); margin: 0 0 4px; }
.qa-link-desc { font-size: 0.85rem; color: var(--text-sub); margin: 0; line-height: 1.6; }

/* ============================================================
   Responsive — New Components
   ============================================================ */
@media (max-width: 1000px) {
  .step-cards-grid { grid-template-columns: 1fr; gap: 16px; }
}
@media (max-width: 900px) {
  .archive-hub-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .nav-tabs { display: none; }
  .archive-hub-card { padding: 18px 20px; }
  .qa-link-block { flex-direction: column; align-items: flex-start; gap: 12px; }
  .step-nav-btn { width: 100%; justify-content: center; }
}

/* ============================================================
   Header NAV — DAY1/DAY2 Pill型ボタン
   ============================================================ */
.nav-tab-link--day {
  background: rgba(217, 119, 87, 0.1);
  color: var(--accent);
  border: 1.5px solid rgba(217, 119, 87, 0.28);
  border-radius: 50px !important;
  font-weight: 700;
  padding: 5px 14px;
  transition: color 0.2s, background 0.2s, transform 0.2s, box-shadow 0.2s;
}
.nav-tab-link--day:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(217, 119, 87, 0.35);
  text-decoration: none;
}
.nav-tab-link--day.active {
  background: linear-gradient(150deg, #D06030 0%, #AA4418 100%);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 3px 12px rgba(160, 60, 20, 0.38);
}

/* ============================================================
   Step Cards — ボタン下揃え・アイコン・説明文
   ============================================================ */
/* カード縦方向flex化でボタン下揃えを実現 */
.step-card {
  display: flex;
  flex-direction: column;
}
.step-card-body {
  flex: 1;
  display: flex;
  flex-direction: column;
}
.step-card-btn {
  margin-top: auto;
}

/* ヘッダー上部: STEP番号 + アイコンを横並び */
.step-card-header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}
.step-card-header-top .step-number {
  margin-bottom: 0;
}
.step-card-icon {
  font-size: 22px !important;
  color: var(--primary);
  opacity: 0.65;
}
.step-card--1 .step-card-icon { color: var(--accent); }
.step-card--2 .step-card-icon { color: var(--accent-dark); }

/* STEP0専用ヘッダー色 */
.step-card--0 .step-card-header {
  background: linear-gradient(140deg, #EEE8E0 0%, #E6DDD4 100%);
}
.step-card--0 .step-number {
  color: var(--text-sub);
  background: rgba(107, 91, 78, 0.1);
  border-color: rgba(107, 91, 78, 0.22);
}
.step-card--0 .step-card-icon { color: var(--text-sub); }

/* 説明文2行スタイル */
.step-card-desc {
  font-size: 0.875rem;
  color: var(--text-sub);
  line-height: 1.75;
  margin: 0 0 0;
  flex: 1;
}

/* ============================================================
   推奨参加スタイル帯
   ============================================================ */
.recommended-style {
  display: flex;
  align-items: center;
  gap: 14px;
  background: linear-gradient(135deg, #FDF5EE 0%, #FAF0E6 100%);
  border: 1.5px solid rgba(217, 119, 87, 0.22);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  margin-top: 32px;
  box-shadow: 0 2px 10px rgba(217, 119, 87, 0.08);
}
.recommended-style--inline {
  margin-top: 28px;
}
.recommended-style-emoji {
  font-size: 1.5rem;
  flex-shrink: 0;
  line-height: 1;
}
.recommended-style-body {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 10px;
}
.recommended-style-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-dark);
  white-space: nowrap;
}
.recommended-style-text {
  font-size: 0.85rem;
  color: var(--text-sub);
  line-height: 1.65;
}

/* ============================================================
   DAY Page Hero — サムネイル＋参加前チェックリスト
   ============================================================ */
.day-hero-section {
  background: var(--bg);
  padding: 40px 0 36px;
}
.day-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}
.day-hero-thumb {
  position: relative;
}
.day-hero-badge-wrap {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
}
.day-hero-img {
  width: 100%;
  display: block;
  border-radius: var(--radius);
}
.day-hero-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  background: linear-gradient(150deg, #D06030 0%, #AA4418 100%);
  color: #fff;
  font-size: 0.88rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  padding: 6px 18px;
  border-radius: 50px;
  box-shadow: 0 3px 12px rgba(160, 60, 20, 0.45);
}
.day-hero-badge--2 {
  background: linear-gradient(150deg, #B8542A 0%, #8C3A12 100%);
}
.day-hero-checklist-wrap {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.day-hero-heading {
  font-size: clamp(1.15rem, 2vw, 1.4rem);
  font-weight: 700;
  color: var(--text);
  line-height: 1.35;
  margin: 0 0 16px;
  word-break: keep-all;
}
.day-checklist {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 0;
  padding: 0;
}
.day-checklist-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.925rem;
  color: var(--text);
  font-weight: 500;
  line-height: 1.5;
}
.day-checklist-item .material-icons {
  font-size: 20px;
  color: var(--primary);
  flex-shrink: 0;
  opacity: 0.75;
}
.day-hero-note {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin: 8px 0 0;
  line-height: 1.6;
}

/* ============================================================
   Responsive — DAY Hero & Recommended Style
   ============================================================ */
@media (max-width: 860px) {
  .day-hero { grid-template-columns: 1fr; gap: 24px; }
  .day-hero-thumb { max-width: 480px; margin: 0 auto; width: 100%; }
}
@media (max-width: 768px) {
  .day-hero-section { padding: 28px 0 24px; }
  .recommended-style { flex-direction: column; align-items: flex-start; gap: 10px; padding: 14px 16px; }
  .recommended-style-body { flex-direction: column; gap: 2px; }
}
@media (max-width: 480px) {
  .day-hero-badge { font-size: 0.78rem; padding: 5px 14px; }
}

/* ============================================================
   FIX v2: Step Cards — グリッド・高さ揃え・デザイン強化
   ============================================================ */

/* 5カラムグリッド: カード1fr | コネクタauto | カード1fr | コネクタauto | カード1fr */
.step-cards-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 0 16px;
  align-items: start;
}

/* カード: flex column で高さを揃え */
.step-card {
  display: flex;
  flex-direction: column;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.09);
}
.step-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.14);
}

/* ヘッダー: 大きな番号をデコレーション (::after pseudo-element) */
.step-card-header {
  position: relative;
  overflow: hidden;
  min-height: 88px;
}
.step-card--0 .step-card-header::after { content: '0'; }
.step-card--1 .step-card-header::after { content: '1'; }
.step-card--2 .step-card-header::after { content: '2'; }
.step-card--0 .step-card-header::after,
.step-card--1 .step-card-header::after,
.step-card--2 .step-card-header::after {
  position: absolute;
  right: 10px;
  bottom: -14px;
  font-size: 5.5rem;
  font-weight: 900;
  line-height: 1;
  color: rgba(0, 0, 0, 0.07);
  pointer-events: none;
  user-select: none;
  font-family: 'Inter', sans-serif;
}

/* ボディ: gap を 0 に上書きし、desc が伸びることでボタンを押し下げる */
.step-card-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 20px 24px 24px;
  gap: 0;
}

/* 説明文: flex:1 でボタンを自然に下へ押し出す */
.step-card-desc {
  flex: 1;
  margin-bottom: 18px;
}

/* ボタン: margin-top は不要 (desc の flex:1 が押し下げ役) */
.step-card-btn {
  margin-top: 0;
}

/* コネクタ矢印 */
.step-card-connector {
  display: flex;
  align-items: center;
  justify-content: center;
  align-self: center;
  color: var(--primary);
  opacity: 0.38;
  flex-shrink: 0;
  width: 28px;
}
.step-card-connector .material-icons {
  font-size: 28px;
}

/* レスポンシブ: 1000px以下で縦積み */
@media (max-width: 1000px) {
  .step-cards-grid {
    grid-template-columns: 1fr;
    gap: 0;
  }
  .step-card-connector {
    transform: rotate(90deg);
    margin: 12px 0;
    justify-self: center;
    align-self: auto;
  }
}

/* ============================================================
   FIX v2: DAY Hero — 2カラム・チェックリストカード
   ============================================================ */

/* DAYヒーローを確実に2カラムにする */
.day-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  align-items: start;   /* stretch→start: 右側が伸びても左サムネに影響しない */
}

/* サムネイル列: 固定比率で安定表示 */
.day-hero-thumb {
  position: relative;
  display: block;      /* flexを解除 */
}
.day-hero-badge-wrap {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
  width: 100%;
  aspect-ratio: 16 / 9;   /* 固定比率: チェックリスト高さに影響されない */
  background: #FAF6F2;     /* object-fit: contain の余白色 */
}
.day-hero-img {
  width: 100%;
  height: 100%;
  object-fit: contain;  /* cover→contain: 必要以上に切り抜かない */
  display: block;
  border-radius: var(--radius);
}

/* チェックリスト列: カードとして表示 */
.day-hero-checklist-wrap {
  display: flex;
  flex-direction: column;
}
.day-checklist-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 32px 32px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 0;
  flex: 1;
  border-left: 4px solid var(--primary);
}
.day-checklist-card .section-label {
  margin-bottom: 6px;
}
.day-checklist-card .day-hero-heading {
  font-size: clamp(1.1rem, 1.8vw, 1.3rem);
  margin-bottom: 20px;
}
.day-checklist-card .day-checklist {
  gap: 14px;
}
.day-checklist-card .day-checklist-item {
  font-size: 0.95rem;
}
.day-checklist-card .day-checklist-item .material-icons {
  color: var(--primary);
  opacity: 1;
  font-size: 22px;
}
.day-checklist-card .day-hero-note {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}

/* レスポンシブ: 860px以下で縦積み */
@media (max-width: 860px) {
  .day-hero {
    grid-template-columns: 1fr;
    gap: 24px;
    align-items: flex-start;
  }
  .day-hero-thumb {
    max-width: 480px;
    margin: 0 auto;
    width: 100%;
  }
  .day-hero-badge-wrap {
    aspect-ratio: 16 / 9;
  }
  .day-hero-img {
    height: 100%;
    object-fit: contain;
  }
  .day-checklist-card {
    padding: 22px 24px 24px;
  }
}

/* ============================================================
   FIX v2: Header — DAY1/DAY2 視認性を強調
   ============================================================ */
.nav-tab-link--day {
  background: linear-gradient(135deg, rgba(217,119,87,0.16) 0%, rgba(201,107,58,0.10) 100%);
  color: var(--accent);
  border: 1.5px solid rgba(217, 119, 87, 0.38);
  border-radius: 50px;
  font-weight: 700;
  font-size: 0.84rem;
  padding: 5px 16px;
  box-shadow: 0 2px 8px rgba(217, 119, 87, 0.16);
  text-decoration: none;
}
.nav-tab-link--day:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(217, 119, 87, 0.40);
  text-decoration: none;
}
.nav-tab-link--day.active {
  background: linear-gradient(150deg, #D06030 0%, #AA4418 100%);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 3px 14px rgba(160, 60, 20, 0.42);
}

/* ============================================================
   POLISH v3: タブナビ Pill 化 + DAY1/DAY2 主導線強調
   ============================================================ */

/* tab-nav: カード間gap + 縦padding */
.tab-nav {
  gap: 6px !important;
  padding: 10px 20px !important;
}

/* ====== ベースタブ: 角丸四角カード型 ====== */
.tab-btn {
  border-bottom: none !important;
  border-bottom-color: transparent !important;
  border-radius: 10px !important;
  padding: 10px 18px !important;
  font-size: 0.84rem !important;
  font-weight: 500 !important;
  color: var(--text-sub) !important;
  background: rgba(0, 0, 0, 0.05) !important;
  border: 1px solid rgba(0, 0, 0, 0.08) !important;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06) !important;
  transition: background 0.18s, color 0.18s, transform 0.15s, box-shadow 0.15s !important;
}
.tab-btn:hover {
  background: rgba(0, 0, 0, 0.10) !important;
  color: var(--text) !important;
  border-color: rgba(0,0,0,0.14) !important;
  transform: translateY(-2px) !important;
  box-shadow: 0 4px 10px rgba(0,0,0,0.10) !important;
  border-bottom: none !important;
}
.tab-btn.active {
  background: #C05020 !important;
  color: #fff !important;
  border-color: transparent !important;
  border-bottom: none !important;
  border-bottom-color: transparent !important;
  box-shadow: 0 3px 10px rgba(192,80,32,0.32) !important;
}

/* ====== DAY1 / DAY2: オレンジ強調カード ====== */
.tab-btn.tab-btn--day {
  background: linear-gradient(135deg, rgba(208,96,48,0.12) 0%, rgba(160,60,20,0.07) 100%) !important;
  color: #B84010 !important;
  border: 1.5px solid rgba(208,96,48,0.40) !important;
  font-weight: 700 !important;
  font-size: 0.88rem !important;
  box-shadow: 0 2px 6px rgba(208,96,48,0.14) !important;
}
.tab-btn.tab-btn--day:hover {
  background: #D06030 !important;
  color: #fff !important;
  border-color: transparent !important;
  transform: translateY(-2px) !important;
  box-shadow: 0 6px 18px rgba(208,96,48,0.36) !important;
}
.tab-btn.tab-btn--day.active {
  background: linear-gradient(150deg, #D06030 0%, #AA4418 100%) !important;
  color: #fff !important;
  border-color: transparent !important;
  box-shadow: 0 4px 16px rgba(160,60,20,0.42) !important;
}

/* スマホ: paddingを小さく */
@media (max-width: 540px) {
  .tab-nav {
    gap: 4px !important;
    padding: 6px 10px !important;
  }
  .tab-btn {
    padding: 8px 12px !important;
    font-size: 0.78rem !important;
    border-radius: 8px !important;
  }
}

/* ============================================================
   POLISH v3: ステップカード 高さ完全統一
   ============================================================ */

/* align-items: start → stretch に変更: 3カードが同じ高さになる */
.step-cards-grid {
  align-items: stretch !important;
}
/* カード自体はflex columnを維持 */
.step-card {
  height: 100%;
}
/* コネクタは自分だけ中央揃えに戻す (stretch上書き) */
.step-card-connector {
  align-self: center !important;
}

/* ============================================================
   POLISH v3: ステップカード ヘッダー テラコッタ系に変更
   ============================================================ */

/* STEP0 header */
.step-card--0 .step-card-header {
  background: linear-gradient(140deg, #8B5E3C 0%, #6E4A2E 100%);
}
/* STEP1 header */
.step-card--1 .step-card-header {
  background: linear-gradient(140deg, #C96A3A 0%, #A0481F 100%);
}
/* STEP2 header */
.step-card--2 .step-card-header {
  background: linear-gradient(140deg, #D47A50 0%, #B05530 100%);
}

/* テキストを白に */
.step-card--0 .step-card-header,
.step-card--1 .step-card-header,
.step-card--2 .step-card-header {
  color: #fff;
}
.step-card--0 .step-number,
.step-card--1 .step-number,
.step-card--2 .step-number {
  color: rgba(255,255,255,0.85) !important;
  background: rgba(255,255,255,0.15) !important;
}
.step-card--0 .step-card-title,
.step-card--1 .step-card-title,
.step-card--2 .step-card-title {
  color: #fff !important;
}
.step-card--0 .step-card-icon,
.step-card--1 .step-card-icon,
.step-card--2 .step-card-icon {
  color: rgba(255,255,255,0.80) !important;
}
/* デコレーション数字を白寄りに */
.step-card--0 .step-card-header::after,
.step-card--1 .step-card-header::after,
.step-card--2 .step-card-header::after {
  color: rgba(255,255,255,0.13) !important;
}

/* ============================================================
   POLISH v3: チェックリスト カスタムチェックボックス
   ============================================================ */

.day-checklist-item {
  padding: 0;
}
.day-check-label {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  padding: 8px 0;
  user-select: none;
}
/* デフォルトcheckboxを非表示 */
.day-check-input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}
/* カスタムチェックサークル */
.day-check-custom {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid rgba(217,119,87,0.55);
  background: #fff;
  transition: background 0.18s, border-color 0.18s, transform 0.12s;
  display: flex;
  align-items: center;
  justify-content: center;
}
.day-check-custom::after {
  content: '';
  display: block;
  width: 7px;
  height: 12px;
  border-right: 2.5px solid #fff;
  border-bottom: 2.5px solid #fff;
  transform: rotate(45deg) translate(-1px,-2px);
  opacity: 0;
  transition: opacity 0.15s;
}
/* チェック済み状態 */
.day-check-input:checked + .day-check-custom {
  background: linear-gradient(135deg, #D06030 0%, #A03810 100%);
  border-color: transparent;
  transform: scale(1.08);
}
.day-check-input:checked + .day-check-custom::after {
  opacity: 1;
}
.day-check-text {
  font-size: 0.95rem;
  color: var(--text);
  transition: color 0.18s, text-decoration 0.18s;
  line-height: 1.5;
}
.day-check-input:checked ~ .day-check-text {
  color: var(--text-sub);
  text-decoration: line-through;
}
.day-check-label:hover .day-check-custom {
  border-color: var(--primary);
}

/* ============================================================
   POLISH v3: 準備完了メッセージ
   ============================================================ */

.day-checklist-complete {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-top: 20px;
  padding: 18px 20px;
  background: linear-gradient(135deg, #FFF3EB 0%, #FEE8D6 100%);
  border: 1.5px solid rgba(208,96,48,0.28);
  border-radius: var(--radius);
  box-shadow: 0 4px 18px rgba(208,96,48,0.14);
  animation: fadeSlideIn 0.32s ease;
}
@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
.day-complete-icon {
  font-size: 1.8rem;
  line-height: 1;
  flex-shrink: 0;
}
.day-complete-body {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.day-complete-title {
  font-size: 1rem;
  font-weight: 700;
  color: #A03810;
}
.day-complete-text {
  font-size: 0.88rem;
  color: var(--text);
  line-height: 1.6;
  margin: 0;
}

/* ============================================================
   前提知識ページ: インストール記事リンクカード
   ============================================================ */

.setup-card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  align-items: stretch;
  margin-top: 8px;
}

.setup-link-card {
  display: flex;
  flex-direction: column;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.09);
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
}
.setup-link-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.13);
}

/* ヘッダー: ブラウン系（Claude Code） */
.setup-link-card-header {
  padding: 24px 28px 20px;
  background: linear-gradient(140deg, #8B5E3C 0%, #6E4A2E 100%);
  color: #fff;
  display: flex;
  align-items: flex-start;
  gap: 14px;
}
/* ヘッダー: テラコッタ系（Codex） */
.setup-link-card--codex .setup-link-card-header {
  background: linear-gradient(140deg, #C96A3A 0%, #A0481F 100%);
}

.setup-link-card-icon {
  font-size: 28px;
  opacity: 0.88;
  flex-shrink: 0;
  margin-top: 2px;
}
.setup-link-card-title {
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.45;
  color: #fff;
  margin: 0;
}

/* ボディ: 白背景、ボタン下揃え */
.setup-link-card-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 22px 28px 26px;
}
.setup-link-card-desc {
  flex: 1;
  font-size: 0.93rem;
  color: var(--text-sub);
  line-height: 1.65;
  margin-bottom: 20px;
}

/* ボタン: オレンジ系 */
.setup-link-card-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 22px;
  background: var(--primary);
  color: #fff;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.18s, transform 0.15s, box-shadow 0.15s;
  align-self: flex-start;
  box-shadow: 0 2px 8px rgba(217, 119, 87, 0.30);
}
.setup-link-card-btn:hover {
  background: var(--primary-dark);
  color: #fff;
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(184, 84, 42, 0.38);
}
.setup-link-card-btn .material-icons {
  font-size: 16px;
}

/* スマホ: 縦並び */
@media (max-width: 640px) {
  .setup-card-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================================
   DAY1ページ: 事前学習動画サブカテゴリ
   ============================================================ */

/* サブカテゴリ区切りブロック */
.day-sub-category {
  margin-top: 40px;
  padding-top: 36px;
  border-top: 1px solid var(--border);
}
.day-sub-category:first-of-type {
  margin-top: 28px;
  padding-top: 28px;
}

/* カテゴリ見出し */
.day-sub-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  margin: 0 0 8px;
}
.day-sub-title .material-icons {
  font-size: 20px;
  color: var(--primary);
  flex-shrink: 0;
}

/* カテゴリ説明 */
.day-sub-desc {
  font-size: 0.92rem;
  color: var(--text-sub);
  margin: 0 0 18px;
  line-height: 1.6;
}

/* ============================================================
   前提知識ページ: セットアップ進捗チェックリスト
   ============================================================ */

.prereq-check-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  align-items: stretch;
  margin-bottom: 24px;
}

/* カード外枠 */
.prereq-check-card {
  display: flex;
  flex-direction: column;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.09);
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
}
.prereq-check-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.12);
}

/* カードヘッダー: 環境準備（ブラウン） */
.prereq-check-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 20px 24px 18px;
  background: linear-gradient(140deg, #8B5E3C 0%, #6E4A2E 100%);
  color: #fff;
}
/* カードヘッダー: 事前動画（テラコッタ） */
.prereq-check-card-header--video {
  background: linear-gradient(140deg, #C96A3A 0%, #A0481F 100%);
}
.prereq-check-icon {
  font-size: 24px;
  opacity: 0.9;
  flex-shrink: 0;
}
.prereq-check-card-title {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin: 0;
}

/* チェックリスト本体 */
.prereq-check-list {
  list-style: none;
  padding: 16px 24px 22px;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
}
.prereq-check-item { padding: 0; }

.prereq-check-label {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  padding: 8px 0;
  user-select: none;
}
/* デフォルトcheckboxを非表示 */
.prereq-check-input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}
/* カスタムチェックサークル */
.prereq-check-custom {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid rgba(217, 119, 87, 0.55);
  background: #fff;
  transition: background 0.18s, border-color 0.18s, transform 0.12s;
  display: flex;
  align-items: center;
  justify-content: center;
}
.prereq-check-custom::after {
  content: '';
  display: block;
  width: 7px;
  height: 12px;
  border-right: 2.5px solid #fff;
  border-bottom: 2.5px solid #fff;
  transform: rotate(45deg) translate(-1px, -2px);
  opacity: 0;
  transition: opacity 0.15s;
}
.prereq-check-input:checked + .prereq-check-custom {
  background: linear-gradient(135deg, #D06030 0%, #A03810 100%);
  border-color: transparent;
  transform: scale(1.08);
}
.prereq-check-input:checked + .prereq-check-custom::after {
  opacity: 1;
}
.prereq-check-text {
  font-size: 0.93rem;
  color: var(--text);
  line-height: 1.5;
  transition: color 0.18s, text-decoration 0.18s;
}
.prereq-check-input:checked ~ .prereq-check-text {
  color: var(--text-sub);
  text-decoration: line-through;
}
.prereq-check-label:hover .prereq-check-custom {
  border-color: var(--primary);
}

/* ============================================================
   前提知識ページ: セットアップ完了メッセージ
   ============================================================ */

.prereq-complete {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 22px 26px;
  background: linear-gradient(135deg, #FFF3EB 0%, #FEE8D6 100%);
  border: 1.5px solid rgba(208, 96, 48, 0.28);
  border-radius: var(--radius);
  box-shadow: 0 4px 18px rgba(208, 96, 48, 0.14);
  animation: fadeSlideIn 0.32s ease;
}
.prereq-complete-icon {
  font-size: 2rem;
  line-height: 1;
  flex-shrink: 0;
}
.prereq-complete-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.prereq-complete-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: #A03810;
}
.prereq-complete-text {
  font-size: 0.9rem;
  color: var(--text);
  line-height: 1.65;
  margin: 0;
}
.prereq-complete-btns {
  display: flex;
  gap: 10px;
  margin-top: 14px;
  flex-wrap: wrap;
}
.prereq-complete-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: background 0.18s, transform 0.15s, box-shadow 0.15s;
}
.prereq-complete-btn--primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(217, 119, 87, 0.28);
}
.prereq-complete-btn--primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(184, 84, 42, 0.36);
}
.prereq-complete-btn--secondary {
  background: rgba(208, 96, 48, 0.10);
  color: #B84010;
  border: 1.5px solid rgba(208, 96, 48, 0.32);
}
.prereq-complete-btn--secondary:hover {
  background: rgba(208, 96, 48, 0.18);
  transform: translateY(-1px);
}
.prereq-complete-btn .material-icons {
  font-size: 16px;
}

/* スマホ: 1カラム */
@media (max-width: 640px) {
  .prereq-check-grid {
    grid-template-columns: 1fr;
  }
  .prereq-complete {
    flex-direction: column;
    gap: 12px;
  }
  .prereq-complete-btns {
    flex-direction: column;
  }
  .prereq-complete-btn {
    justify-content: center;
  }
}

/* ============================================================
   DAY1: 作業フォルダ作成カード（完全独立クラス wac）
   ============================================================ */

/* ============================================================
   ディレクトリ学習ナビ: YES / NO カード（グリッド内4枚目）
   ============================================================ */
.dir-nav {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.22s, box-shadow 0.22s;
  display: flex;
  flex-direction: column;
  align-self: start; /* 同行の動画カードの高さに引っ張られない */
}
.dir-nav:hover { transform: translateY(-3px); box-shadow: var(--shadow); }

.dir-nav-inner {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 18px 18px 20px;
}
.dir-nav-head {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}
.dir-nav-icon  { font-size: 22px !important; color: var(--primary); flex-shrink: 0; margin-top: 1px; }
.dir-nav-title { font-size: 0.93rem; font-weight: 700; color: var(--text); margin: 0; line-height: 1.4; }
.dir-nav-desc  { font-size: 0.80rem; color: var(--text-sub); margin: 0; line-height: 1.65; }
.dir-nav-btns  { display: flex; flex-direction: column; gap: 8px; }
.dir-nav-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 9px 14px;
  border-radius: 50px;
  border: none;
  cursor: pointer;
  font-size: 0.83rem;
  font-weight: 600;
  font-family: inherit;
  transition: background 0.2s, transform 0.2s;
}
.dir-nav-btn .material-icons { font-size: 15px !important; }
.dir-nav-btn--yes {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 2px 6px rgba(217, 119, 87, 0.25);
}
.dir-nav-btn--yes:hover { background: var(--primary-dark); transform: translateY(-1px); }
.dir-nav-btn--no {
  background: var(--bg);
  color: var(--text-sub);
  border: 1px solid var(--border);
}
.dir-nav-btn--no:hover { background: #f0ece8; }
.dir-nav-result {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 18px 20px;
}
.dir-nav-result-head {
  display: flex;
  align-items: center;
  gap: 7px;
}
.dir-nav-result-icon      { font-size: 20px !important; flex-shrink: 0; }
.dir-nav-result-icon--yes { color: #4caf50; }
.dir-nav-result-icon--no  { color: var(--primary); }
.dir-nav-result-title { font-size: 0.92rem; font-weight: 700; color: var(--text); margin: 0; }
.dir-nav-result-desc  { font-size: 0.80rem; color: var(--text-sub); margin: 0; line-height: 1.6; }
.dir-nav-result-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 9px 14px;
  border-radius: 50px;
  background: var(--primary);
  color: #fff;
  border: none;
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 600;
  font-family: inherit;
  text-decoration: none;
  transition: background 0.2s, transform 0.2s;
  box-shadow: 0 2px 6px rgba(217, 119, 87, 0.22);
  margin-top: 4px;
}
.dir-nav-result-btn:hover { background: var(--primary-dark); transform: translateY(-1px); }
.dir-nav-result-btn .material-icons { font-size: 14px !important; }

/* ============================================================
   補助導線: MINI WORKカード
   ============================================================ */
.wac {
  margin-top: 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  transition: box-shadow 0.22s, background 0.3s;
}
.wac:hover { box-shadow: var(--shadow-sm); }
.wac--highlight {
  box-shadow: 0 0 0 2px var(--primary), var(--shadow-sm);
  background: rgba(217, 119, 87, 0.05);
}
.wac-label {
  display: inline-block;
  font-size: 0.58rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  color: var(--primary);
  background: rgba(217, 119, 87, 0.09);
  border: 1px solid rgba(217, 119, 87, 0.20);
  padding: 2px 8px;
  border-radius: 50px;
  align-self: flex-start;
  flex-shrink: 0;
}
.wac-text { flex: 1; min-width: 160px; }
.wac-title { font-size: 0.85rem; font-weight: 700; color: var(--text); margin: 0 0 3px; }
.wac-desc  { font-size: 0.78rem; color: var(--text-sub); line-height: 1.55; margin: 0 0 2px; }
.wac-hint  { font-size: 0.72rem; color: var(--primary); opacity: 0.85; margin: 0; }
.wac-action {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 5px;
  flex-shrink: 0;
}
.wac-sub { font-size: 0.68rem; color: var(--text-sub); opacity: 0.65; white-space: nowrap; }
.wac-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 8px 16px;
  border-radius: 50px;
  background: var(--primary);
  color: #fff;
  border: none;
  cursor: pointer;
  font-size: 0.80rem;
  font-weight: 600;
  font-family: inherit;
  transition: background 0.2s, transform 0.2s;
  box-shadow: 0 2px 6px rgba(217, 119, 87, 0.20);
  white-space: nowrap;
}
.wac-btn:hover { background: var(--primary-dark); transform: translateY(-1px); }
.wac-btn .material-icons { font-size: 14px !important; }

@media (max-width: 600px) {
  .dir-nav-btns { width: 100%; }
  .dir-nav-btn  { flex: 1; justify-content: center; }
  .wac-action   { width: 100%; flex-direction: row; align-items: center; }
  .wac-btn      { flex: 1; justify-content: center; }
}

/* ============================================================
   作業フォルダ作成プロンプト: モーダル
   ============================================================ */

.wp-modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(28, 20, 16, 0.58);
  z-index: 500;
  align-items: center;
  justify-content: center;
  padding: 20px;
  backdrop-filter: blur(2px);
}
.wp-modal-overlay.active {
  display: flex;
}

.wp-modal-card {
  background: var(--white);
  border-radius: var(--radius);
  width: 100%;
  max-width: 580px;
  max-height: 92vh;
  overflow-y: auto;
  position: relative;
  padding: 32px 32px 28px;
  box-shadow: 0 16px 56px rgba(28, 20, 16, 0.24);
  animation: wpModalIn 0.2s ease;
}

@keyframes wpModalIn {
  from { opacity: 0; transform: translateY(16px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.wp-modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-sub);
  padding: 6px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, color 0.15s;
}
.wp-modal-close:hover {
  background: rgba(217, 119, 87, 0.12);
  color: var(--primary-dark);
}
.wp-modal-close .material-icons {
  font-size: 20px;
}

.wp-modal-title {
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 18px;
  padding-right: 32px;
  line-height: 1.4;
}

.wp-modal-note {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 14px 16px;
  background: #FFF8F0;
  border: 1.5px solid rgba(208, 96, 48, 0.28);
  border-left-width: 4px;
  border-left-color: var(--primary);
  border-radius: var(--radius-sm);
  margin-bottom: 18px;
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--text);
}
.wp-modal-note .material-icons {
  font-size: 18px;
  color: var(--primary-dark);
  flex-shrink: 0;
  margin-top: 2px;
}
.wp-modal-note strong {
  color: #92400E;
  display: block;
  margin-bottom: 3px;
  font-size: 0.875rem;
}

.wp-modal-desc {
  font-size: 0.875rem;
  color: var(--text-sub);
  margin-bottom: 12px;
}

.wp-modal-prompt {
  background: #F7F5F2;
  border: 1px solid rgba(217, 119, 87, 0.18);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  margin-bottom: 18px;
}
.wp-modal-prompt pre {
  font-family: 'Noto Sans JP', 'Inter', sans-serif;
  font-size: 0.875rem;
  line-height: 1.9;
  color: var(--text);
  white-space: pre-wrap;
  word-break: break-word;
  margin: 0;
}

.wp-modal-copy-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 13px 20px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  box-shadow: 0 2px 10px rgba(217, 119, 87, 0.30);
  transition: background 0.18s, transform 0.15s, box-shadow 0.15s;
}
.wp-modal-copy-btn:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(184, 84, 42, 0.38);
}
.wp-modal-copy-btn--done {
  background: #22A06B;
  box-shadow: 0 2px 10px rgba(34, 160, 107, 0.28);
}
.wp-modal-copy-btn--done:hover {
  background: #1A8457;
}
.wp-modal-copy-btn .material-icons {
  font-size: 18px;
}

@media (max-width: 640px) {
  .wp-modal-card {
    padding: 24px 18px 22px;
  }
  .wp-modal-title {
    font-size: 1rem;
  }
  .wp-modal-note {
    gap: 8px;
  }
}

/* ============================================================
   当日Q&Aページ: フィルターコントロール
   ============================================================ */

.qa-controls {
  background: var(--white);
  border: 1px solid rgba(208, 96, 48, 0.22);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin-bottom: 24px;
  position: sticky;
  top: 72px;
  z-index: 10;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}
.qa-controls-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}
.qa-controls-row + .qa-controls-row {
  margin-top: 10px;
}
.qa-controls label {
  font-size: 12px;
  color: var(--text-sub);
  font-weight: 600;
  white-space: nowrap;
  margin-right: 2px;
}
#qa-search {
  flex: 1;
  min-width: 200px;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13.5px;
  font-family: inherit;
  color: var(--text);
  outline: none;
  background: #FAFAFA;
  transition: border-color 0.18s, box-shadow 0.18s;
}
#qa-search:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(208, 96, 48, 0.14);
  background: #fff;
}
.qa-controls-stats {
  margin-left: auto;
  font-size: 12px;
  color: var(--text-sub);
  white-space: nowrap;
}
.qa-filter-btn {
  background: var(--white);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 5px 12px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 12px;
  font-weight: 500;
  font-family: inherit;
  transition: all 0.15s;
  line-height: 1.4;
}
.qa-filter-btn:hover {
  background: #FFF3EB;
  border-color: var(--primary);
  color: var(--primary-dark);
}
.qa-filter-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.qa-filter-btn--priority {
  border-color: rgba(208, 96, 48, 0.45);
  color: #7C2D12;
  font-weight: 600;
}
.qa-filter-btn--priority.active {
  background: #8B3A10;
  border-color: #8B3A10;
  color: #fff;
}

/* ============================================================
   当日Q&Aページ: セクション見出し・テーブル・バッジ
   ============================================================ */

.qa-section-heading {
  font-size: 1.15rem;
  font-weight: 700;
  color: #7C2D12;
  border-left: 5px solid var(--primary);
  padding-left: 12px;
  margin: 40px 0 14px;
  line-height: 1.4;
}
.qa-section-heading:first-child {
  margin-top: 0;
}
.qa-count-label {
  font-size: 13px;
  color: var(--text-sub);
  font-weight: 400;
  margin-left: 8px;
}

/* バッジ共通 */
.qa-badge {
  display: inline-block;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 999px;
  font-weight: 600;
  vertical-align: middle;
  white-space: nowrap;
  line-height: 1.6;
}
.qa-b-day1 {
  background: #FEF3E2;
  color: #92400E;
  border: 1px solid #FDE68A;
}
.qa-b-day2 {
  background: #DBEAFE;
  color: #1E40AF;
  border: 1px solid #93C5FD;
}
.qa-b-cat {
  background: #F3F4F6;
  color: #374151;
  border: 1px solid #D1D5DB;
  font-weight: 500;
}
.qa-b-priority {
  background: #FFF3EB;
  color: #7C2D12;
  border: 1px solid rgba(208, 96, 48, 0.38);
  font-weight: 600;
}

/* テーブル */
table.qa-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  font-size: 13px;
  margin-bottom: 8px;
}
table.qa-table thead th {
  background: #FFF3EB;
  color: #7C2D12;
  text-align: left;
  padding: 10px 12px;
  font-size: 12px;
  letter-spacing: 0.04em;
  border-bottom: 1px solid rgba(208, 96, 48, 0.22);
  font-weight: 600;
}
table.qa-table tbody td {
  padding: 11px 12px;
  vertical-align: top;
  border-bottom: 1px solid #F3F4F6;
  line-height: 1.6;
}
table.qa-table tbody tr:last-child td {
  border-bottom: none;
}
table.qa-table tbody tr:hover {
  background: #FAFAFB;
}
table.qa-table tbody tr.qa-priority-row {
  background: #FFFAF6;
}
table.qa-table tbody tr.qa-priority-row:hover {
  background: #FFF3EB;
}
table.qa-table td.qa-col-id {
  font-weight: 700;
  color: var(--primary);
  width: 44px;
  text-align: center;
}
table.qa-table td.qa-col-cat {
  width: 130px;
  font-size: 11.5px;
}
table.qa-table td.qa-col-q {
  font-weight: 500;
  width: 30%;
  color: var(--text);
}
table.qa-table td.qa-col-a {
  color: #374151;
}
table.qa-table tbody tr.hidden {
  display: none !important;
}

/* Mobile */
@media (max-width: 768px) {
  .qa-controls {
    position: static;
    top: auto;
  }
  .qa-section-heading {
    font-size: 1.02rem;
  }
  .qa-table-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: var(--radius);
  }
  table.qa-table {
    min-width: 600px;
  }
}

/* ============================================================
   質問会カード（トップページ）
   ============================================================ */
.qa-session-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 36px;
  box-shadow: var(--shadow-sm);
  margin-top: 24px;
}
.qa-session-badge {
  display: inline-block;
  background: linear-gradient(140deg, #FDEADE 0%, #F8D5C2 100%);
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 5px 14px;
  border-radius: 50px;
  margin-bottom: 14px;
}
.qa-session-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
  line-height: 1.4;
}
.qa-session-desc {
  font-size: 0.9rem;
  color: var(--text-sub);
  line-height: 1.75;
  margin-bottom: 22px;
}
.qa-session-desc strong { color: var(--accent-dark); }
.qa-session-info {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 18px;
}
.qa-session-info-item {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--primary-light);
  border-radius: var(--radius-sm);
  padding: 14px 20px;
  flex: 1 1 220px;
}
.qa-session-info-item .material-icons {
  font-size: 20px;
  color: var(--accent-dark);
  background: var(--white);
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
}
.qa-session-info-item div { display: flex; flex-direction: column; }
.qa-session-info-label {
  font-size: 0.72rem;
  color: var(--text-muted);
}
.qa-session-info-value {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--accent-dark);
}
.qa-session-note {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--text-sub);
}
.qa-session-note .material-icons {
  font-size: 16px;
  color: var(--accent);
}

/* ============================================================
   質問会チェックリスト + Zoomリンク表示
   ============================================================ */
.qa-checklist {
  margin-top: 40px;
}
.qa-checklist-title {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}
.qa-checklist-desc {
  font-size: 0.9rem;
  color: var(--text-sub);
  line-height: 1.75;
  margin-bottom: 24px;
}
.qa-check-grid { align-items: stretch; margin-bottom: 20px; }

/* STEP別ヘッダーカラー（学習の流れSTEP0〜2見出しの色をそのまま再利用） */
.qa-check-header-0 { background: var(--text-sub); }
.qa-check-header-1 { background: var(--accent); }
.qa-check-header-2 { background: var(--accent-dark); }
.qa-check-header-0 .prereq-check-icon,
.qa-check-header-1 .prereq-check-icon,
.qa-check-header-2 .prereq-check-icon,
.qa-check-header-0 .prereq-check-card-title,
.qa-check-header-1 .prereq-check-card-title,
.qa-check-header-2 .prereq-check-card-title { color: #fff; }

/* STEP別チェックアイコンカラー（ヘッダーと同じ色を再利用） */
.qa-check-card--0 .day-check-input:checked + .day-check-custom { background: var(--text-sub); }
.qa-check-card--0 .day-check-label:hover .day-check-custom { border-color: var(--text-sub); }

.qa-check-card--1 .day-check-input:checked + .day-check-custom { background: var(--accent); }
.qa-check-card--1 .day-check-label:hover .day-check-custom { border-color: var(--accent); }

.qa-check-card--2 .day-check-input:checked + .day-check-custom { background: var(--accent-dark); }
.qa-check-card--2 .day-check-label:hover .day-check-custom { border-color: var(--accent-dark); }

.qa-zoom-locked {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  background: var(--bg-dark);
  border: 1.5px dashed var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-sub);
}
.qa-zoom-locked .material-icons { font-size: 22px; color: var(--text-muted); }
.qa-zoom-locked p { font-size: 0.88rem; line-height: 1.6; margin: 0; }

.qa-zoom-unlocked {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 22px 26px;
  background: linear-gradient(135deg, #FFF3EB 0%, #FEE8D6 100%);
  border: 1.5px solid rgba(208, 96, 48, 0.28);
  border-radius: var(--radius);
  box-shadow: 0 4px 18px rgba(208, 96, 48, 0.14);
  animation: fadeSlideIn 0.32s ease;
}
.qa-zoom-unlocked-icon { font-size: 2rem; line-height: 1; flex-shrink: 0; }
.qa-zoom-unlocked-body { display: flex; flex-direction: column; flex: 1; }
.qa-zoom-unlocked-title { font-size: 1.05rem; font-weight: 700; color: #A03810; margin-bottom: 16px; }

/* Zoom参加CTAボタン: 塗りつぶし・高視認性 */
.qa-zoom-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  align-self: flex-start;
  padding: 14px 32px;
  border-radius: 50px;
  background: var(--accent);
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  white-space: nowrap;
  box-shadow: 0 4px 14px rgba(201, 107, 58, 0.32);
  transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
  margin-bottom: 16px;
}
.qa-zoom-cta:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(160, 73, 30, 0.4);
  text-decoration: none;
  color: #fff;
}
.qa-zoom-cta .material-icons { font-size: 20px; }

.qa-zoom-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  font-size: 0.82rem;
  color: var(--text-sub);
  padding-top: 12px;
  border-top: 1px dashed rgba(160, 60, 20, 0.2);
}

@media (max-width: 640px) {
  .qa-session-card { padding: 22px 20px; }
  .qa-session-info { flex-direction: column; gap: 12px; }
  .qa-zoom-unlocked { flex-direction: column; gap: 10px; }
  .qa-zoom-cta { width: 100%; }
  .qa-zoom-meta { flex-direction: column; gap: 4px; }
}