/* ========================================
   Docs Pages — docs.css
   Styles for the usage guide / documentation
   ======================================== */

:root {
  /* Docs Specific Light Variables */
  --docs-section-num-bg: linear-gradient(135deg, rgba(0,209,255,0.12), rgba(0,209,255,0.04));
  --docs-tip-bg: linear-gradient(135deg, rgba(0,209,255,0.08), rgba(0,209,255,0.02));
  --docs-tip-border: rgba(0,209,255,0.15);
  --docs-caution-bg: linear-gradient(135deg, rgba(255,214,0,0.10), rgba(255,214,0,0.03));
  --docs-caution-border: rgba(255,214,0,0.2);
}

:root[data-theme="dark"] {
  /* Docs Specific Dark Variables */
  --docs-section-num-bg: linear-gradient(135deg, rgba(0,209,255,0.18), rgba(0,209,255,0.06));
  --docs-tip-bg: linear-gradient(135deg, rgba(0,209,255,0.12), rgba(0,209,255,0.04));
  --docs-tip-border: rgba(0,209,255,0.2);
  --docs-caution-bg: linear-gradient(135deg, rgba(255,214,0,0.12), rgba(255,214,0,0.04));
  --docs-caution-border: rgba(255,214,0,0.25);
}

.docs {
  padding: 100px 24px 80px;
  min-height: calc(100vh - 200px);
}

.docs__inner {
  max-width: 760px;
  margin: 0 auto;
}

.docs__title {
  font-weight: 800;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.docs__lead {
  font-size: 1.05rem;
  color: var(--text-sub);
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

/* ---------- Table of Contents ---------- */
.docs__toc {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 32px;
  margin-bottom: 56px;
}

.docs__toc-title {
  font-weight: 800;
  font-size: 1rem;
  letter-spacing: -0.01em;
  margin-bottom: 16px;
  color: var(--text);
}

.docs__toc-list {
  list-style: none;
  counter-reset: toc-counter;
  padding-left: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px 32px;
}

.docs__toc-list li {
  counter-increment: toc-counter;
  font-size: 0.9rem;
  line-height: 2;
}

.docs__toc-list li a {
  color: var(--text-sub);
  transition: color 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.docs__toc-list li a::before {
  content: counter(toc-counter, decimal-leading-zero);
  font-family: var(--font-en);
  font-weight: 700;
  font-size: 0.75rem;
  color: var(--primary);
  opacity: 0.6;
  min-width: 20px;
}

.docs__toc-list li a:hover {
  color: var(--primary);
}

/* ---------- Section ---------- */
.docs__section {
  margin-bottom: 48px;
  scroll-margin-top: 80px;
}

.docs__section-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
}

.docs__section-number {
  font-family: var(--font-en);
  font-weight: 800;
  font-size: 0.85rem;
  color: var(--primary);
  background: var(--docs-section-num-bg);
  border-radius: 8px;
  padding: 4px 10px;
  letter-spacing: 0.04em;
  flex-shrink: 0;
}

.docs__section-header h2 {
  font-weight: 700;
  font-size: 1.3rem;
  letter-spacing: -0.01em;
}

/* ---------- Content ---------- */
.docs__content {
  padding-left: 52px;
}

.docs__content p {
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--text-sub);
  margin-bottom: 12px;
}

.docs__content p strong {
  color: var(--text);
  font-weight: 600;
}

.docs__content h3 {
  font-weight: 600;
  font-size: 1rem;
  margin-top: 24px;
  margin-bottom: 10px;
  color: var(--text);
  padding-left: 12px;
  border-left: 3px solid var(--primary);
}

/* ---------- Lists ---------- */
.docs__list {
  padding-left: 24px;
  margin-bottom: 16px;
}

.docs__list li {
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--text-sub);
  margin-bottom: 4px;
}

.docs__list li strong {
  color: var(--text);
  font-weight: 600;
}

.docs__list--ordered {
  list-style-type: decimal;
}

/* ---------- Tip / Caution boxes ---------- */
.docs__tip,
.docs__caution {
  display: flex;
  gap: 12px;
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  margin-top: 16px;
  margin-bottom: 8px;
}

.docs__tip {
  background: var(--docs-tip-bg);
  border: 1px solid var(--docs-tip-border);
}

.docs__caution {
  background: var(--docs-caution-bg);
  border: 1px solid var(--docs-caution-border);
}

.docs__tip-icon,
.docs__caution-icon {
  font-size: 1.2rem;
  flex-shrink: 0;
  line-height: 1.85;
}

.docs__tip p,
.docs__caution p {
  margin-bottom: 0;
}

/* ---------- FAQ ---------- */
.docs__faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px 24px;
  margin-bottom: 12px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.docs__faq-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.docs__faq-item h3 {
  font-weight: 700;
  font-size: 0.95rem;
  margin-top: 0;
  margin-bottom: 8px;
  padding-left: 0;
  border-left: none;
  color: var(--text);
}

.docs__faq-item p {
  margin-bottom: 0;
}

/* ---------- Contact CTA ---------- */
.docs__section--cta {
  margin-top: 56px;
  margin-bottom: 0;
}

.docs__cta-card {
  background: linear-gradient(135deg, #00D1FF, #0090CC);
  color: #FFFFFF;
  border-radius: var(--radius);
  padding: 48px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.docs__cta-card::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 50%, rgba(255,214,0,0.10) 0%, transparent 50%),
              radial-gradient(circle at 70% 30%, rgba(255,255,255,0.06) 0%, transparent 40%);
  pointer-events: none;
}

.docs__cta-card h2 {
  font-weight: 800;
  font-size: 1.4rem;
  margin-bottom: 8px;
  position: relative;
}

.docs__cta-card p {
  font-size: 0.95rem;
  opacity: 0.9;
  margin-bottom: 24px;
  color: #FFFFFF;
  position: relative;
}

.docs__cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.2);
  color: #FFFFFF;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 14px 28px;
  border-radius: 50px;
  backdrop-filter: blur(8px);
  transition: background 0.3s ease, transform 0.3s ease;
  position: relative;
}

.docs__cta-btn:hover {
  background: rgba(255,255,255,0.35);
  transform: translateY(-2px);
}

/* ---------- Active nav link ---------- */
.header__link--active {
  color: var(--primary) !important;
}

/* ---------- Responsive ---------- */
@media (max-width: 600px) {
  .docs {
    padding: 80px 16px 60px;
  }

  .docs__content {
    padding-left: 0;
  }

  .docs__section-header {
    gap: 10px;
  }

  .docs__section-number {
    font-size: 0.78rem;
    padding: 3px 8px;
  }

  .docs__section-header h2 {
    font-size: 1.1rem;
  }

  .docs__toc {
    padding: 20px 20px;
  }

  .docs__toc-list {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .docs__cta-card {
    padding: 36px 24px;
  }

  .docs__faq-item {
    padding: 16px 18px;
  }
}

/* ========================================
   図（figures.js が kit/ の部品で描く）
   ======================================== */

.docs-figs {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
  margin: 24px 0 8px;
}

.docs-fig {
  margin: 24px auto 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  max-width: 100%;
}

.docs-figs .docs-fig {
  margin: 0;
}

.docs-fig__stage {
  position: relative;
  overflow: hidden;
  border-radius: 22px;
  background: var(--surface);
  box-shadow: 0 0 0 1px var(--border), 0 18px 40px -12px rgba(0, 60, 80, 0.25);
}

.docs-fig__screen {
  position: absolute;
  left: 0;
  top: 0;
  transform-origin: 0 0;
  pointer-events: none;
}

.docs-fig__box {
  position: absolute;
  border: 3px solid #F25C5C;
  border-radius: 12px;
  pointer-events: none;
}

.docs-fig__pin {
  position: absolute;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #F25C5C;
  color: #fff;
  font: 700 13px/24px var(--font-en);
  text-align: center;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.25);
}

.docs-fig figcaption {
  margin-top: 12px;
  font-size: 0.82rem;
  color: var(--text-sub);
  text-align: center;
}

/* 図の番号と対応する説明 */
.docs__pins {
  list-style: none;
  padding: 0;
  margin: 16px 0;
  counter-reset: none;
}

.docs__pins li {
  position: relative;
  padding-left: 34px;
  margin-bottom: 10px;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--text-sub);
}

.docs__pins li::before {
  content: attr(data-n);
  position: absolute;
  left: 0;
  top: 3px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #F25C5C;
  color: #fff;
  font: 700 12px/22px var(--font-en);
  text-align: center;
}

.docs__pins li strong {
  color: var(--text);
}

/* HTML だけで描く図（流れ・ボタンの並び・ヒートマップ） */
.docs-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin: 24px 0 8px;
}

.docs-flow__step {
  flex: 0 1 150px;
  text-align: center;
  padding: 16px 12px;
  border-radius: 16px;
  background: var(--card-bg);
  border: 1px solid var(--border);
}

.docs-flow__icon {
  display: inline-flex;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  background: rgba(0, 209, 255, 0.12);
  margin-bottom: 8px;
}

.docs-flow__step b {
  display: block;
  font-size: 0.9rem;
  color: var(--text);
}

.docs-flow__step span {
  display: block;
  font-size: 0.78rem;
  color: var(--text-sub);
  margin-top: 4px;
  line-height: 1.5;
}

.docs-flow__arrow {
  color: var(--text-sub);
  opacity: 0.6;
  display: inline-flex;
}

.docs-bar {
  display: flex;
  justify-content: center;
  gap: 4px;
  margin: 24px auto 8px;
  padding: 14px 10px;
  max-width: 420px;
  border-radius: 18px;
  background: #111;
}

.docs-bar__btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  color: #fff;
  font-size: 0.72rem;
  font-weight: 600;
}

.docs-bar__btn--warn { color: #FFD600; }
.docs-bar__btn--danger { color: #FF6B6B; }
.docs-bar__btn--accent { color: #00D1FF; }

.docs-heat {
  margin: 24px auto 8px;
  max-width: 460px;
  padding: 18px;
  border-radius: 18px;
  background: var(--card-bg);
  border: 1px solid var(--border);
}

.docs-heat__grid {
  display: grid;
  grid-template-rows: repeat(7, 1fr);
  grid-auto-flow: column;
  gap: 3px;
}

.docs-heat__grid i {
  display: block;
  aspect-ratio: 1;
  border-radius: 3px;
  background: var(--border);
}

.docs-heat__grid i.on { background: #00D1FF; }
.docs-heat__grid i.on2 { background: rgba(0, 209, 255, 0.45); }

.docs-heat__legend {
  display: flex;
  justify-content: space-between;
  margin-top: 10px;
  font-size: 0.78rem;
  color: var(--text-sub);
}

@media (max-width: 600px) {
  .docs-flow__arrow { transform: rotate(90deg); }
  .docs-flow__step { flex-basis: 70%; }
}