/* ================================================================
   QUEST Official Site — styles.css
   第一学院高等学校 養父校 クイズサークル QUEST
   Design: Dark Navy × Accent Gold / Minimalist Editorial
   ================================================================ */

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

:root {
  --bg: #07162f;
  --bg2: #0d1f42;
  --bg3: #112254;
  --surface: #0f1e3d;
  --surface2: #162545;
  --border: rgba(255,255,255,.08);
  --border2: rgba(255,255,255,.14);
  --text: #e8edf7;
  --text2: #9baac4;
  --text3: #6b7fa0;
  --accent: #f0b429;
  --accent2: #e8a500;
  --accent-light: rgba(240,180,41,.12);
  --red: #e53e3e;
  --green: #38a169;
  --radius: 8px;
  --radius-lg: 14px;
  --shadow: 0 4px 24px rgba(0,0,0,.35);
  --shadow-lg: 0 8px 48px rgba(0,0,0,.5);
  --font-sans: 'Noto Sans JP', system-ui, sans-serif;
  --font-mono: 'DM Mono', 'Courier New', monospace;
  --font-display: 'Oswald', 'Impact', sans-serif;
  --max-w: 1100px;
  --header-h: 64px;
  --transition: .2s ease;
}

/* Dark mode (default), Light mode toggle */
body.light {
  --bg: #f5f7fb;
  --bg2: #eef1f8;
  --bg3: #e5e9f4;
  --surface: #ffffff;
  --surface2: #f0f3fb;
  --border: rgba(0,0,0,.08);
  --border2: rgba(0,0,0,.14);
  --text: #111827;
  --text2: #4b5563;
  --text3: #9ca3af;
  --accent: #b45309;
  --accent2: #92400e;
  --accent-light: rgba(180,83,9,.08);
}

html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
  transition: background var(--transition), color var(--transition);
}

/* ── Typography ── */
h1, h2, h3, h4 { line-height: 1.25; font-weight: 700; letter-spacing: -.01em; }
h1 { font-size: clamp(2.2rem, 7vw, 4rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.2rem); }
h3 { font-size: clamp(1.05rem, 2.5vw, 1.3rem); }
p { color: var(--text2); }
a { color: inherit; text-decoration: none; }
em { font-style: normal; color: var(--accent); }

/* ── Accessibility ── */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip-link { position: absolute; top: -100%; left: 1rem; background: var(--accent); color: #000; padding: .5rem 1rem; border-radius: var(--radius); font-weight: 700; z-index: 9999; transition: top .2s; }
.skip-link:focus { top: 1rem; }

/* ── Site Notice Bar ── */
.site-notice {
  background: var(--accent);
  color: #000;
  font-size: .8rem;
  font-weight: 600;
  font-family: var(--font-mono);
  letter-spacing: .04em;
  padding: .45rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  text-align: center;
  justify-content: center;
}
.site-notice span {
  background: rgba(0,0,0,.15);
  padding: .15rem .55rem;
  border-radius: 20px;
  font-size: .72rem;
  flex-shrink: 0;
}
.site-notice a { text-decoration: underline; text-underline-offset: 2px; }
.site-notice a:hover { opacity: .7; }

/* ── Header ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  height: var(--header-h);
  background: rgba(7,22,47,.92);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  gap: 1.5rem;
}
body.light .site-header { background: rgba(245,247,251,.92); }

.brand {
  display: flex;
  align-items: center;
  gap: .75rem;
  flex-shrink: 0;
}
.brand b {
  font-family: var(--font-display);
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--accent);
  line-height: 1;
}
.brand small {
  font-size: .65rem;
  color: var(--text3);
  line-height: 1.35;
  letter-spacing: .02em;
}

.desktop-nav {
  display: flex;
  gap: .25rem;
  align-items: center;
}
.desktop-nav a {
  padding: .4rem .75rem;
  border-radius: var(--radius);
  font-size: .85rem;
  font-weight: 500;
  color: var(--text2);
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
}
.desktop-nav a:hover { background: var(--surface2); color: var(--text); }

.header-actions {
  display: flex;
  align-items: center;
  gap: .6rem;
  flex-shrink: 0;
}

.theme-button {
  background: none;
  border: 1px solid var(--border2);
  color: var(--text2);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--transition), background var(--transition);
}
.theme-button:hover { background: var(--surface2); border-color: var(--text3); }

.join-button {
  background: var(--accent);
  color: #000;
  font-size: .8rem;
  font-weight: 700;
  padding: .45rem 1rem;
  border-radius: 30px;
  white-space: nowrap;
  transition: background var(--transition), transform var(--transition);
  letter-spacing: .02em;
}
.join-button:hover { background: var(--accent2); transform: translateY(-1px); }

.menu-button {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: .4rem;
}
.menu-button i {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* ── Mobile Menu ── */
.mobile-menu {
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  padding: 1rem 1.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: .25rem;
  z-index: 190;
  box-shadow: var(--shadow);
}
.mobile-menu[hidden] { display: none; }
.mobile-menu a {
  padding: .75rem 1rem;
  border-radius: var(--radius);
  font-size: .95rem;
  font-weight: 500;
  color: var(--text2);
  transition: background var(--transition), color var(--transition);
}
.mobile-menu a:hover { background: var(--surface2); color: var(--text); }
.mobile-menu .join-button {
  margin-top: .5rem;
  text-align: center;
  display: block;
  padding: .7rem 1rem;
}

/* ── Main / Content ── */
#main { min-height: calc(100vh - var(--header-h) - 300px); }
.content {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ── Section ── */
.section {
  padding: 4rem 0;
  border-bottom: 1px solid var(--border);
}
.section:last-child { border-bottom: none; }

.section-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 2rem;
  gap: 1rem;
}
.section-label {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .12em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: .5rem;
  display: flex;
  align-items: center;
  gap: .5rem;
}
.section-label::before {
  content: '';
  width: 20px;
  height: 2px;
  background: var(--accent);
  flex-shrink: 0;
}

/* ── Hero ── */
.hero {
  position: relative;
  min-height: calc(100svh - var(--header-h) - 36px);
  display: flex;
  align-items: center;
  overflow: hidden;
  background: radial-gradient(ellipse 80% 60% at 60% 40%, var(--bg3) 0%, var(--bg) 100%);
  padding: 4rem 1.5rem;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, transparent 40%, rgba(240,180,41,.04) 100%),
    repeating-linear-gradient(0deg, transparent, transparent 79px, var(--border) 80px),
    repeating-linear-gradient(90deg, transparent, transparent 79px, var(--border) 80px);
}
.hero-inner {
  position: relative;
  max-width: var(--max-w);
  margin: 0 auto;
  width: 100%;
  z-index: 1;
}
.eyebrow {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .14em;
  color: var(--text3);
  margin-bottom: 1.5rem;
  text-transform: uppercase;
}
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(5rem, 18vw, 12rem);
  font-weight: 700;
  letter-spacing: -.02em;
  line-height: .92;
  color: var(--text);
  margin-bottom: 1.5rem;
}
.hero p {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--text2);
  max-width: 480px;
  margin-bottom: 2.5rem;
  line-height: 1.8;
}
.hero-actions {
  display: flex;
  gap: .75rem;
  flex-wrap: wrap;
}
.hero-mark {
  position: absolute;
  right: -2%;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-display);
  font-size: clamp(12rem, 35vw, 28rem);
  font-weight: 700;
  color: transparent;
  -webkit-text-stroke: 1px rgba(240,180,41,.1);
  line-height: 1;
  pointer-events: none;
  user-select: none;
  letter-spacing: -.05em;
}

/* ── Buttons / Links ── */
a.primary, button.primary {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  background: var(--accent);
  color: #000;
  font-weight: 700;
  font-size: .9rem;
  padding: .7rem 1.4rem;
  border-radius: 30px;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  border: none;
  cursor: pointer;
  letter-spacing: .02em;
}
a.primary:hover, button.primary:hover {
  background: var(--accent2);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(240,180,41,.25);
}

a.secondary, button.secondary {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  background: transparent;
  color: var(--text);
  font-weight: 600;
  font-size: .9rem;
  padding: .68rem 1.35rem;
  border-radius: 30px;
  border: 1px solid var(--border2);
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
  cursor: pointer;
  letter-spacing: .02em;
}
a.secondary:hover, button.secondary:hover {
  border-color: var(--text3);
  background: var(--surface2);
  transform: translateY(-1px);
}

a.text-link {
  color: var(--accent);
  font-size: .85rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  white-space: nowrap;
  padding: .2rem 0;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), opacity var(--transition);
}
a.text-link:hover { border-color: var(--accent); opacity: .8; }

/* ── Find Grid (ホーム) ── */
.find-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
a.find-card {
  background: var(--surface);
  padding: 2rem 1.75rem;
  display: block;
  transition: background var(--transition);
  position: relative;
}
a.find-card:hover { background: var(--surface2); }
a.find-card .number {
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--accent);
  letter-spacing: .1em;
  display: block;
  margin-bottom: .75rem;
}
a.find-card h3 { font-size: 1.05rem; margin-bottom: .5rem; color: var(--text); }
a.find-card p { font-size: .85rem; color: var(--text3); margin-bottom: 1rem; line-height: 1.6; }
a.find-card strong {
  font-size: .82rem;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: .02em;
}

/* ── Session Card (ホーム) ── */
.session {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.session-main {
  background: var(--surface);
  padding: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}
.session-date {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--accent);
  margin-bottom: .75rem;
  text-transform: uppercase;
}
.session-main h3 { font-size: 1.3rem; margin-bottom: .5rem; }
.session-main p { font-size: .9rem; max-width: 480px; }
.session-details {
  background: var(--surface2);
  padding: 2rem;
  display: grid;
  grid-template-rows: repeat(4, 1fr);
  gap: 1rem;
  min-width: 200px;
}
.session-details > div { display: flex; flex-direction: column; gap: .2rem; }
.session-details span {
  font-family: var(--font-mono);
  font-size: .65rem;
  letter-spacing: .1em;
  color: var(--text3);
  text-transform: uppercase;
}
.session-details b { font-size: .85rem; color: var(--text); font-weight: 600; }

/* ── News List ── */
.news-list { display: flex; flex-direction: column; gap: 0; }
a.news-row {
  display: grid;
  grid-template-columns: 100px 80px 1fr auto;
  align-items: center;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
  border-radius: var(--radius);
  padding-left: .5rem;
  padding-right: .5rem;
}
a.news-row:hover { background: var(--surface2); }
a.news-row time {
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--text3);
  letter-spacing: .05em;
}
a.news-row .tag {
  font-family: var(--font-mono);
  font-size: .65rem;
  letter-spacing: .08em;
  background: var(--accent-light);
  color: var(--accent);
  padding: .2rem .55rem;
  border-radius: 20px;
  text-transform: uppercase;
  white-space: nowrap;
}
a.news-row b { font-weight: 600; font-size: .9rem; color: var(--text); }
a.news-row .arrow { color: var(--text3); font-size: .9rem; flex-shrink: 0; }

/* ── CTA Section ── */
.cta {
  background: linear-gradient(135deg, var(--bg3) 0%, var(--bg2) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 4rem 3rem;
  margin: 2rem 0 4rem;
  position: relative;
  overflow: hidden;
}
.cta::before {
  content: '?';
  position: absolute;
  right: 3rem;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-display);
  font-size: 12rem;
  color: transparent;
  -webkit-text-stroke: 1px rgba(240,180,41,.08);
  pointer-events: none;
}
.cta h2 { font-size: clamp(1.5rem, 4vw, 2.5rem); color: var(--text); margin: .75rem 0 1rem; }
.cta p { color: var(--text2); max-width: 480px; margin-bottom: 2rem; }

/* ── Page Hero ── */
.page-hero {
  background: linear-gradient(135deg, var(--bg2) 0%, var(--bg3) 100%);
  border-bottom: 1px solid var(--border);
  padding: 5rem 1.5rem 4rem;
}
.page-hero .content { position: relative; }
.page-hero h1 { color: var(--text); margin: .5rem 0 1rem; }
.page-hero p { font-size: 1rem; color: var(--text2); max-width: 560px; }

/* ── Schedule List ── */
.schedule-list { display: flex; flex-direction: column; gap: .75rem; }
.schedule-card {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  transition: border-color var(--transition), background var(--transition);
  cursor: default;
}
.schedule-card:hover { border-color: var(--border2); background: var(--surface2); }
.schedule-card time {
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--accent);
  letter-spacing: .06em;
  white-space: nowrap;
  flex-shrink: 0;
}
.schedule-card .badge {
  display: inline-block;
  background: var(--accent-light);
  color: var(--accent);
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .08em;
  padding: .15rem .5rem;
  border-radius: 20px;
  margin-bottom: .35rem;
  text-transform: uppercase;
  font-family: var(--font-mono);
}
.schedule-card h3 { font-size: 1rem; margin-bottom: .3rem; color: var(--text); font-weight: 600; }
.schedule-card p { font-size: .82rem; color: var(--text3); }
.schedule-card .arrow {
  margin-left: auto;
  color: var(--text3);
  font-size: 1rem;
  flex-shrink: 0;
  transition: transform var(--transition);
}
.schedule-card:hover .arrow { transform: translateX(4px); }

/* ── Cards Grid ── */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}
.article-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: .75rem;
  transition: border-color var(--transition), transform var(--transition);
}
.article-card:hover { border-color: var(--border2); transform: translateY(-2px); }
.article-card .tag {
  font-family: var(--font-mono);
  font-size: .65rem;
  letter-spacing: .08em;
  color: var(--accent);
  text-transform: uppercase;
}
.article-card h3 { font-size: 1rem; color: var(--text); font-weight: 600; }
.article-card p { font-size: .85rem; color: var(--text2); flex: 1; }
.article-card time { font-family: var(--font-mono); font-size: .72rem; color: var(--text3); margin-top: auto; }

/* ── Split Layout ── */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}
p.prose { font-size: 1rem; line-height: 1.85; color: var(--text2); }
ul.check-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: .85rem;
  padding-top: .5rem;
}
ul.check-list li {
  display: flex;
  align-items: center;
  gap: .75rem;
  font-size: .9rem;
  color: var(--text2);
}
ul.check-list li::before {
  content: '✓';
  color: var(--accent);
  font-weight: 700;
  font-family: var(--font-mono);
  flex-shrink: 0;
  font-size: .9rem;
}

/* ── Members ── */
.member-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
}
.member {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .75rem;
  transition: border-color var(--transition), transform var(--transition);
}
.member:hover { border-color: var(--accent); transform: translateY(-3px); }
.avatar {
  width: 60px;
  height: 60px;
  background: var(--accent-light);
  border: 2px solid var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent);
}
.member h3 { font-size: 1rem; color: var(--text); }
.member .meta { font-family: var(--font-mono); font-size: .72rem; color: var(--text3); letter-spacing: .05em; }
.member p { font-size: .85rem; color: var(--text2); line-height: 1.65; }

/* ── Guide Grid (入部・見学) ── */
.guide-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 2rem;
}
.guide-grid > div {
  background: var(--surface);
  padding: 2rem 1.75rem;
  display: flex;
  flex-direction: column;
  gap: .75rem;
}
.guide-grid span {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .1em;
  color: var(--accent);
  text-transform: uppercase;
}
.guide-grid h3 { font-size: 1.05rem; color: var(--text); font-weight: 700; }
.guide-grid p { font-size: .85rem; color: var(--text2); line-height: 1.7; flex: 1; }

/* ── Forms ── */
.form-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  max-width: 720px;
}
.form-wrap h2 { font-size: 1.4rem; margin-bottom: .5rem; color: var(--text); }
.form-note { font-size: .82rem; color: var(--text3); margin-bottom: 1.5rem; line-height: 1.6; }
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.field { display: flex; flex-direction: column; gap: .4rem; }
.field.full { grid-column: 1 / -1; }
.field span {
  font-size: .8rem;
  font-weight: 600;
  color: var(--text2);
  display: flex;
  align-items: center;
  gap: .4rem;
}
.field em { font-style: normal; font-size: .7rem; color: var(--red); font-weight: 700; }
.field small { color: var(--text3); font-size: .7rem; }
.field input, .field select, .field textarea {
  background: var(--bg);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: .9rem;
  padding: .6rem .9rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  width: 100%;
}
.field input:focus, .field select:focus, .field textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}
.field textarea { min-height: 100px; resize: vertical; }
.field select { cursor: pointer; }
.field input::placeholder, .field textarea::placeholder { color: var(--text3); }

button.submit {
  background: var(--accent);
  color: #000;
  font-weight: 700;
  font-size: .9rem;
  padding: .75rem 1.75rem;
  border-radius: 30px;
  border: none;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
  letter-spacing: .02em;
}
button.submit:hover { background: var(--accent2); transform: translateY(-1px); }

/* ── Toast ── */
.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--surface);
  border: 1px solid var(--border2);
  color: var(--text);
  font-size: .85rem;
  padding: .75rem 1.5rem;
  border-radius: 30px;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s, transform .3s;
  z-index: 9999;
  white-space: nowrap;
  max-width: 90vw;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ── Footer ── */
.site-footer {
  background: var(--bg2);
  border-top: 1px solid var(--border);
  padding: 4rem 1.5rem 2rem;
  margin-top: 4rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 3rem;
  max-width: var(--max-w);
  margin: 0 auto 3rem;
}
.footer-brand { margin-bottom: 1rem; display: inline-flex; }
.footer-grid > div > p {
  font-size: .85rem;
  color: var(--text3);
  line-height: 1.7;
  margin-top: .75rem;
}
.footer-grid strong {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .12em;
  color: var(--text3);
  text-transform: uppercase;
  display: block;
  margin-bottom: 1rem;
}
.footer-grid a {
  display: block;
  font-size: .85rem;
  color: var(--text2);
  padding: .25rem 0;
  transition: color var(--transition);
}
.footer-grid a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--text3);
  letter-spacing: .03em;
}

/* ── Responsive ── */
@media (max-width: 900px) {
  .desktop-nav { display: none; }
  .join-button { display: none; }
  .menu-button { display: flex; }
  .find-grid { grid-template-columns: 1fr; }
  .session { grid-template-columns: 1fr; }
  .session-details { grid-template-rows: auto; grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr; gap: 2rem; }
  .guide-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  html { font-size: 15px; }
  :root { --header-h: 56px; }

  .site-notice { font-size: .72rem; flex-wrap: wrap; gap: .5rem; }
  .site-header { padding: 0 1rem; }

  .hero { padding: 3rem 1rem; min-height: calc(100svh - 56px - 36px); }
  .hero h1 { font-size: clamp(4rem, 22vw, 7rem); }
  .hero-mark { display: none; }
  .hero-actions { flex-direction: column; align-items: flex-start; }
  a.primary, a.secondary { width: 100%; justify-content: center; }

  .content { padding: 0 1rem; }
  .section { padding: 2.5rem 0; }
  .cta { padding: 2.5rem 1.25rem; }
  .cta::before { display: none; }

  a.news-row { grid-template-columns: 1fr auto; grid-template-rows: auto auto; }
  a.news-row time { grid-column: 1; grid-row: 1; font-size: .7rem; }
  a.news-row .tag { display: none; }
  a.news-row b { grid-column: 1; grid-row: 2; font-size: .85rem; }
  a.news-row .arrow { grid-column: 2; grid-row: 1 / 3; }

  .session-main { flex-direction: column; align-items: flex-start; }
  .session-details { grid-template-columns: 1fr 1fr; }

  .form-wrap { padding: 1.5rem 1rem; }
  .form-grid { grid-template-columns: 1fr; }

  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }

  .page-hero { padding: 3rem 1rem 2.5rem; }
  .schedule-card { flex-wrap: wrap; gap: .75rem; }
  .guide-grid > div { padding: 1.5rem 1.25rem; }
  .cards { grid-template-columns: 1fr; }
  .member-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 400px) {
  .member-grid { grid-template-columns: 1fr; }
}

/* ── Print ── */
@media print {
  .site-notice, .site-header, .mobile-menu, .site-footer, .toast { display: none !important; }
  body { background: #fff; color: #000; }
}

/* ── Focus Visible ── */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ── Scrollbar (Chromium) ── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text3); }

/* ================================================================
   QUEST v2 — 追加スタイル（アニメーション・強化コンポーネント）
   ================================================================ */

/* ── Scroll Reveal Animation ── */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s cubic-bezier(.16,1,.3,1), transform .6s cubic-bezier(.16,1,.3,1);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}
[data-reveal="left"]  { transform: translateX(-24px); }
[data-reveal="left"].is-visible  { transform: translateX(0); }
[data-reveal="right"] { transform: translateX(24px); }
[data-reveal="right"].is-visible { transform: translateX(0); }
[data-reveal="scale"] { transform: scale(.95) translateY(12px); }
[data-reveal="scale"].is-visible { transform: scale(1) translateY(0); }

/* ── Stagger delay ── */
[data-delay="1"] { transition-delay: .08s; }
[data-delay="2"] { transition-delay: .16s; }
[data-delay="3"] { transition-delay: .24s; }
[data-delay="4"] { transition-delay: .32s; }
[data-delay="5"] { transition-delay: .40s; }
[data-delay="6"] { transition-delay: .48s; }

/* ── Hero Stats bar ── */
.hero-stats {
  display: flex;
  gap: 2.5rem;
  margin-top: 3rem;
  flex-wrap: wrap;
}
.hero-stat { display: flex; flex-direction: column; gap: .15rem; }
.hero-stat b {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}
.hero-stat span { font-family: var(--font-mono); font-size: .65rem; letter-spacing: .1em; color: var(--text3); text-transform: uppercase; }

/* ── Ticker / Marquee ── */
.ticker-wrap {
  overflow: hidden;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: .65rem 0;
  background: var(--bg2);
}
.ticker {
  display: flex;
  gap: 3rem;
  animation: ticker 28s linear infinite;
  white-space: nowrap;
  width: max-content;
}
.ticker:hover { animation-play-state: paused; }
.ticker span {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .12em;
  color: var(--text3);
  text-transform: uppercase;
  flex-shrink: 0;
}
.ticker span em { color: var(--accent); font-style: normal; }
@keyframes ticker { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

/* ── Feature Strip (between sections) ── */
.feature-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin: 2rem 0;
}
.feature-strip > article {
  background: var(--surface);
  padding: 2rem 1.75rem;
  transition: background var(--transition);
  position: relative;
}
.feature-strip > article:hover { background: var(--surface2); }
.feature-strip .feat-icon {
  font-size: .65rem;
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--accent);
  margin-bottom: 1rem;
  display: block;
  line-height: 1;
  background: var(--accent-light);
  border: 1px solid var(--accent);
  border-radius: 4px;
  padding: 3px 8px;
  width: fit-content;
}
.feature-strip h3 { font-size: 1.05rem; margin-bottom: .5rem; color: var(--text); }
.feature-strip p { font-size: .85rem; color: var(--text2); line-height: 1.65; }
@media (max-width: 640px) {
  .feature-strip { grid-template-columns: 1fr; }
}

/* ── Stat Grid ── */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.stat-grid > div {
  background: var(--surface);
  padding: 2rem 1.5rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .5rem;
}
.stat-grid .num {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}
.stat-grid .label { font-family: var(--font-mono); font-size: .65rem; letter-spacing: .1em; color: var(--text3); text-transform: uppercase; }
.stat-grid .desc { font-size: .8rem; color: var(--text2); }
@media (max-width: 640px) {
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ── Testimonial ── */
.testimonials {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}
.testimonial {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: border-color var(--transition), transform var(--transition);
}
.testimonial:hover { border-color: var(--accent); transform: translateY(-2px); }
.testimonial blockquote {
  font-size: .95rem;
  color: var(--text);
  line-height: 1.75;
  flex: 1;
  position: relative;
  padding-left: 1.25rem;
}
.testimonial blockquote::before {
  content: '"';
  position: absolute;
  left: 0;
  top: -.1rem;
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--accent);
  line-height: 1;
}
.testimonial cite {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .08em;
  color: var(--text3);
  font-style: normal;
}

/* ── FAQ Accordion ── */
.faq-list { display: flex; flex-direction: column; gap: .5rem; }
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--transition);
}
.faq-item:hover { border-color: var(--border2); }
.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  cursor: pointer;
  font-weight: 600;
  font-size: .95rem;
  color: var(--text);
  gap: 1rem;
  user-select: none;
  list-style: none;
}
.faq-q::marker, .faq-q::-webkit-details-marker { display: none; }
.faq-q .faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1px solid var(--border2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .8rem;
  color: var(--text3);
  flex-shrink: 0;
  transition: transform var(--transition), border-color var(--transition), color var(--transition);
}
details[open] .faq-q .faq-icon {
  transform: rotate(45deg);
  border-color: var(--accent);
  color: var(--accent);
}
.faq-a {
  padding: 0 1.5rem 1.25rem;
  font-size: .9rem;
  color: var(--text2);
  line-height: 1.75;
}

/* ── Gallery ── */
.gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 2rem;
}
.gallery-item {
  aspect-ratio: 4/3;
  border-radius: var(--radius);
  background: var(--surface2);
  border: 1px solid var(--border);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  transition: border-color var(--transition);
}
.gallery-item:hover { border-color: var(--border2); }
.gallery-item .gallery-icon { font-size: 2.5rem; opacity: .4; }
.gallery-item span { font-family: var(--font-mono); font-size: .65rem; letter-spacing: .1em; color: var(--text3); text-transform: uppercase; }
@media (max-width: 640px) {
  .gallery { grid-template-columns: repeat(2, 1fr); }
}

/* ── Timeline ── */
.timeline { display: flex; flex-direction: column; gap: 0; }
.timeline-item {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 1.5rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border);
  position: relative;
}
.timeline-item:last-child { border-bottom: none; }
.timeline-date {
  display: flex;
  flex-direction: column;
  gap: .2rem;
  padding-top: .2rem;
}
.timeline-date time {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .06em;
  color: var(--accent);
}
.timeline-date span { font-family: var(--font-mono); font-size: .6rem; color: var(--text3); text-transform: uppercase; }
.timeline-body h3 { font-size: 1rem; color: var(--text); margin-bottom: .35rem; font-weight: 600; }
.timeline-body p { font-size: .85rem; color: var(--text2); line-height: 1.65; }
.timeline-body .badge {
  display: inline-block;
  background: var(--accent-light);
  color: var(--accent);
  font-size: .65rem;
  font-weight: 700;
  letter-spacing: .08em;
  padding: .15rem .5rem;
  border-radius: 20px;
  margin-bottom: .5rem;
  text-transform: uppercase;
  font-family: var(--font-mono);
}

/* ── Progress Bar ── */
.progress-row { display: flex; flex-direction: column; gap: .4rem; margin-bottom: 1rem; }
.progress-label { display: flex; justify-content: space-between; font-size: .82rem; color: var(--text2); }
.progress-label b { color: var(--text); font-weight: 600; }
.progress-bar {
  height: 6px;
  background: var(--surface2);
  border-radius: 3px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 3px;
  transition: width 1s cubic-bezier(.16,1,.3,1);
  width: 0;
}
.progress-fill.is-animated { width: var(--w, 0%); }

/* ── Tab Component ── */
.tab-list {
  display: flex;
  gap: .25rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.5rem;
  overflow-x: auto;
  -ms-overflow-style: none;
  scrollbar-width: none;
}
.tab-list::-webkit-scrollbar { display: none; }
.tab-btn {
  padding: .6rem 1rem;
  font-size: .85rem;
  font-weight: 600;
  color: var(--text3);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: color var(--transition), border-color var(--transition);
  margin-bottom: -1px;
}
.tab-btn:hover { color: var(--text2); }
.tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ── Contact Info Card ── */
.contact-info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}
.contact-info-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: .5rem;
}
.contact-info-card .ci-icon {
  font-size: .6rem;
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--accent);
  background: var(--accent-light);
  border: 1px solid var(--accent);
  border-radius: 4px;
  padding: 2px 6px;
  margin-bottom: .25rem;
  display: inline-block;
}
.contact-info-card span { font-family: var(--font-mono); font-size: .65rem; letter-spacing: .1em; color: var(--accent); text-transform: uppercase; }
.contact-info-card strong { font-size: .95rem; color: var(--text); }
.contact-info-card p { font-size: .82rem; color: var(--text3); line-height: 1.6; }

/* ── Loading Skeleton ── */
.skeleton {
  background: linear-gradient(90deg, var(--surface) 25%, var(--surface2) 50%, var(--surface) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius);
}
@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ── Announcement Banner (enhanced) ── */
.announce-banner {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 1rem 1.5rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.announce-banner .an-icon {
  font-size: .6rem;
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--accent);
  background: var(--accent-light);
  border: 1px solid var(--accent);
  border-radius: 4px;
  padding: 2px 7px;
  flex-shrink: 0;
  margin-top: .1rem;
  white-space: nowrap;
}
.announce-banner h4 { font-size: .9rem; font-weight: 700; color: var(--text); margin-bottom: .25rem; }
.announce-banner p { font-size: .85rem; color: var(--text2); line-height: 1.65; }
.announce-banner time { font-family: var(--font-mono); font-size: .68rem; color: var(--text3); margin-top: .35rem; display: block; }

/* ── Page transition ── */
#main { animation: fade-in .3s ease; }
@keyframes fade-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

/* ── Back-to-top ── */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 1.5rem;
  width: 44px;
  height: 44px;
  background: var(--surface);
  border: 1px solid var(--border2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  cursor: pointer;
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition), transform var(--transition);
  z-index: 100;
  color: var(--text2);
  text-decoration: none;
}
.back-to-top.show { opacity: 1; pointer-events: auto; }
.back-to-top:hover { transform: translateY(-3px); border-color: var(--accent); color: var(--accent); }

/* ── Activity Log item ── */
.activity-log {
  display: flex;
  flex-direction: column;
  gap: .25rem;
}
.log-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: .85rem 1rem;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  font-size: .85rem;
  transition: background var(--transition);
}
.log-item:hover { background: var(--surface2); }
.log-item .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}
.log-item .log-time { font-family: var(--font-mono); font-size: .7rem; color: var(--text3); white-space: nowrap; }
.log-item .log-msg { color: var(--text2); flex: 1; }

/* ── Search box ── */
.search-box {
  display: flex;
  align-items: center;
  gap: .5rem;
  background: var(--surface);
  border: 1px solid var(--border2);
  border-radius: 30px;
  padding: .5rem 1rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.search-box:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}
.search-box input {
  background: none;
  border: none;
  outline: none;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: .9rem;
  flex: 1;
  min-width: 0;
}
.search-box input::placeholder { color: var(--text3); }
.search-box .search-icon { color: var(--text3); font-size: .85rem; flex-shrink: 0; }

/* ── Chip Tags ── */
.chips { display: flex; gap: .4rem; flex-wrap: wrap; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: .25rem .75rem;
  font-size: .78rem;
  color: var(--text2);
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
  font-family: var(--font-mono);
  letter-spacing: .04em;
}
.chip:hover, .chip.active { background: var(--accent-light); border-color: var(--accent); color: var(--accent); }

/* ── Hero gradient overlay update ── */
.hero-scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .5rem;
  opacity: .4;
  animation: bounce-y 2s ease infinite;
}
.hero-scroll-hint span { font-family: var(--font-mono); font-size: .6rem; letter-spacing: .14em; color: var(--text3); text-transform: uppercase; }
.hero-scroll-hint .arrow-down { font-size: .8rem; color: var(--text3); }
@keyframes bounce-y { 0%,100%{transform:translateX(-50%) translateY(0);} 50%{transform:translateX(-50%) translateY(6px);} }

/* ── Reading progress bar ── */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  background: var(--accent);
  z-index: 9999;
  width: 0%;
  transition: width .1s linear;
  pointer-events: none;
}

/* ── Responsive additions ── */
@media (max-width: 900px) {
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  /* Hero stats: 2×2 grid on mobile */
  .hero-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem 2rem; margin-top: 2rem; }
  .hero-stat b { font-size: 1.75rem; }
  .hero-stat span { font-size: .7rem; }
  .contact-info-grid { grid-template-columns: 1fr; }
  .timeline-item { grid-template-columns: 60px 1fr; gap: 1rem; }
  .back-to-top { bottom: 5rem; right: 1rem; }
  /* Feature strip: single column */
  .feature-strip { grid-template-columns: 1fr; }
  /* Find grid: single column */
  .find-grid { grid-template-columns: 1fr; }
}