/* Panorooma 公開サイト共通レイアウト（ヘッダー＋サイドバー） */
:root {
  --site-text: #3d4550;
  --site-text-h: #12161c;
  --site-muted: #5c6670;
  --site-bg: #f3f5f7;
  --site-surface: #fff;
  --site-border: #d8dee6;
  --site-accent: #1f4e79;
  --site-accent-soft: #e8f0f7;
  --site-side-w: 240px;
}

* {
  box-sizing: border-box;
}

body.site {
  margin: 0;
  min-height: 100vh;
  font-family: "Hiragino Sans", "Noto Sans JP", "Segoe UI", sans-serif;
  color: var(--site-text);
  background: var(--site-bg);
  line-height: 1.7;
}

.site a {
  color: var(--site-accent);
}

/* `.site a` より強くし、ボタン文字が青背景に埋もれないようにする */
.site a.site-btn-primary {
  color: #fff;
}

.site a.site-btn-primary:hover,
.site a.site-btn-primary:focus-visible {
  color: #fff;
}

.site a.site-brand {
  color: var(--site-text-h);
}

/* —— Top bar —— */
.site-top {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--site-surface);
  border-bottom: 1px solid var(--site-border);
}

.site-top-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 16px;
  align-items: center;
  justify-content: space-between;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--site-text-h);
  font-weight: 700;
  font-size: 20px;
  text-decoration: none;
}

.site-brand img {
  width: 28px;
  height: 28px;
  display: block;
}

.site-top-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.site-btn {
  display: inline-block;
  padding: 8px 14px;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  font-size: 13px;
  line-height: 1.3;
}

.site-btn-primary {
  background: var(--site-accent);
  color: #fff;
}

.site-btn-primary:hover {
  opacity: 0.92;
  color: #fff;
}

.site-btn-ghost {
  background: transparent;
  color: var(--site-accent);
  border: 1px solid var(--site-border);
}

.site-menu-toggle {
  display: none;
  border: 1px solid var(--site-border);
  background: var(--site-surface);
  color: var(--site-text-h);
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
}

/* —— Body: sidebar + main —— */
.site-body {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: var(--site-side-w) minmax(0, 1fr);
  gap: 0 28px;
  align-items: start;
}

.site-side {
  position: sticky;
  top: 64px;
  padding: 24px 0 40px;
  max-height: calc(100vh - 64px);
  overflow: auto;
}

.site-side-label {
  margin: 18px 0 6px;
  padding: 0 8px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: none;
  color: var(--site-muted);
}

.site-side-label:first-child {
  margin-top: 0;
}

.site-side nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.site-side a {
  display: block;
  padding: 8px 10px;
  border-radius: 6px;
  text-decoration: none;
  color: var(--site-text);
  font-size: 14px;
}

.site-side a:hover {
  background: var(--site-accent-soft);
  color: var(--site-accent);
}

.site-side a[aria-current="page"],
.site-side a.is-active {
  background: var(--site-accent-soft);
  color: var(--site-accent);
  font-weight: 700;
}

.site-main {
  padding: 28px 0 56px;
  min-width: 0;
}

.site-main h1 {
  margin: 0 0 8px;
  color: var(--site-text-h);
  font-size: clamp(28px, 4vw, 36px);
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.site-lead {
  margin: 0 0 20px;
  font-size: 16px;
}

.site-meta {
  margin: 0 0 24px;
  font-size: 13px;
  color: var(--site-muted);
}

.site-panel {
  background: var(--site-surface);
  border: 1px solid var(--site-border);
  border-radius: 8px;
  padding: 22px 20px;
  margin: 0 0 18px;
}

.site-panel h2 {
  margin: 0 0 10px;
  color: var(--site-text-h);
  font-size: 20px;
}

.site-panel h3 {
  margin: 18px 0 8px;
  color: var(--site-text-h);
  font-size: 16px;
}

.site-panel p,
.site-panel li {
  font-size: 15px;
  margin: 0 0 10px;
}

.site-panel ul,
.site-panel ol {
  margin: 0 0 12px;
  padding-left: 1.25em;
}

.site-panel table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  margin: 0 0 12px;
}

.site-panel th,
.site-panel td {
  border: 1px solid var(--site-border);
  padding: 8px 10px;
  text-align: left;
  vertical-align: top;
}

.site-panel th {
  background: var(--site-accent-soft);
  color: var(--site-text-h);
}

.site-panel code,
.site-mono {
  font-family: ui-monospace, "SF Mono", Consolas, monospace;
  font-size: 12px;
  background: #eef1f4;
  padding: 1px 5px;
  border-radius: 3px;
  word-break: break-all;
}

.site-tag {
  display: inline-block;
  background: var(--site-accent-soft);
  color: var(--site-accent);
  font-size: 12px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  margin-bottom: 8px;
}

.site-note,
.site-callout {
  border-radius: 6px;
  padding: 12px 14px;
  margin: 12px 0;
  font-size: 14px;
}

.site-note,
.site-callout-warn {
  background: #fff8e8;
  border: 1px solid #e6d2a0;
}

.site-callout-ok {
  background: #eef7f0;
  border: 1px solid #b7d8c0;
}

.site-copy-box {
  background: #eef1f4;
  border: 1px solid var(--site-border);
  border-radius: 6px;
  padding: 12px 14px;
  font-size: 13px;
  white-space: pre-wrap;
  word-break: break-word;
}

.site-toc {
  background: var(--site-surface);
  border: 1px solid var(--site-border);
  border-radius: 8px;
  padding: 16px 20px;
  margin: 0 0 22px;
}

.site-toc h2 {
  margin: 0 0 8px;
  font-size: 15px;
  color: var(--site-text-h);
}

.site-toc ol {
  margin: 0;
  padding-left: 1.25em;
  font-size: 14px;
}

.site-toc li {
  margin: 0 0 4px;
}

.site-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin: 0 0 24px;
}

.site-card {
  background: var(--site-surface);
  border: 1px solid var(--site-border);
  border-radius: 8px;
  padding: 18px 16px;
  text-decoration: none;
  color: inherit;
  display: block;
}

.site-card:hover {
  border-color: var(--site-accent);
}

.site-card h3 {
  margin: 0 0 8px;
  color: var(--site-accent);
  font-size: 16px;
}

.site-card p {
  margin: 0;
  font-size: 14px;
  color: var(--site-text);
}

.site-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 24px;
}

.site-crumb {
  margin: 0 0 12px;
  font-size: 13px;
  color: var(--site-muted);
}

.site-crumb a {
  text-decoration: none;
}

.site-crumb a:hover {
  text-decoration: underline;
}

/* —— Footer —— */
.site-foot {
  border-top: 1px solid var(--site-border);
  background: var(--site-surface);
  padding: 18px 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  justify-content: center;
  font-size: 13px;
}

.site-foot a {
  text-decoration: none;
}

.site-foot a:hover {
  text-decoration: underline;
}

/* Home-only hero tweaks */
.site-home-title {
  font-size: clamp(36px, 6vw, 48px) !important;
}

.site-en {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--site-border);
  font-size: 14px;
  color: var(--site-muted);
}

.site-en h2 {
  font-size: 16px;
  color: var(--site-text-h);
  margin: 0 0 8px;
}

/* —— Teacher deck (presentation-style) —— */
.site-deck-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin: 0 0 12px;
  padding: 10px 12px;
  background: var(--site-surface);
  border: 1px solid var(--site-border);
  border-radius: 8px;
}

.site-deck-toolbar .site-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.site-deck-progress {
  margin: 0;
  font-size: 13px;
  font-weight: 700;
  color: var(--site-muted);
  font-variant-numeric: tabular-nums;
}

.site-deck-dots {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 14px;
}

.site-deck-dot {
  width: 10px;
  height: 10px;
  padding: 0;
  border: 1px solid var(--site-border);
  border-radius: 50%;
  background: var(--site-surface);
  cursor: pointer;
}

.site-deck-dot.is-active {
  background: var(--site-accent);
  border-color: var(--site-accent);
}

.site-deck {
  margin: 0 0 18px;
}

.site-slide {
  background: var(--site-surface);
  border: 1px solid var(--site-border);
  border-radius: 8px;
  padding: 28px 24px 24px;
  min-height: 320px;
}

.site-slide-num {
  margin: 0 0 10px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--site-muted);
  text-transform: none;
}

.site-slide-title {
  margin: 0 0 12px;
  color: var(--site-text-h);
  font-size: clamp(24px, 3.5vw, 32px);
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.site-slide-kicker {
  margin: 0 0 18px;
  font-size: 17px;
  color: var(--site-text);
}

.site-slide-points {
  margin: 0 0 14px;
  padding-left: 1.25em;
  font-size: 16px;
}

.site-slide-points li {
  margin: 0 0 10px;
}

.site-slide-ol {
  padding-left: 1.35em;
}

.site-slide-note {
  margin: 16px 0 0;
  font-size: 13px;
  color: var(--site-muted);
}

.site-slide .site-compare {
  margin-top: 4px;
}

.site-slide .site-cards {
  margin-top: 8px;
  margin-bottom: 8px;
}

@media print {
  .site-top,
  .site-side,
  .site-deck-toolbar,
  .site-deck-dots,
  .site-menu-toggle,
  .site-foot {
    display: none !important;
  }

  .site-body {
    display: block;
    max-width: none;
    padding: 0;
  }

  .site-slide {
    display: block !important;
    min-height: 0;
    page-break-after: always;
    border: none;
    padding: 12px 0;
  }

  .site-slide[hidden] {
    display: block !important;
  }
}

/* How-it-works: plain-language flow & compare */
.site-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.site-flow-step {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 12px;
  align-items: start;
  margin: 0;
  padding: 14px 14px 6px;
  background: var(--site-accent-soft);
  border-radius: 8px;
}

.site-flow-step p {
  margin: 4px 0 10px;
}

.site-flow-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--site-accent);
  color: #fff;
  font-weight: 700;
  font-size: 14px;
}

.site-compare {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  margin: 8px 0 0;
}

.site-compare-ok,
.site-compare-no {
  border-radius: 8px;
  padding: 14px 16px 6px;
  border: 1px solid var(--site-border);
}

.site-compare-ok {
  background: #eef7f0;
  border-color: #b7d8c0;
}

.site-compare-no {
  background: #fff8e8;
  border-color: #e6d2a0;
}

.site-compare h3 {
  margin: 0 0 8px;
  font-size: 15px;
}

/* Mobile: sidebar as collapsible panel */
@media (max-width: 860px) {
  .site-menu-toggle {
    display: inline-block;
  }

  .site-body {
    grid-template-columns: 1fr;
    padding: 0;
  }

  .site-side {
    position: static;
    max-height: none;
    display: none;
    padding: 12px 20px 8px;
    border-bottom: 1px solid var(--site-border);
    background: var(--site-surface);
  }

  body.site-nav-open .site-side {
    display: block;
  }

  .site-main {
    padding: 24px 20px 48px;
  }

  .site-side nav {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 4px;
  }

  .site-side-label {
    grid-column: 1 / -1;
    margin-top: 12px;
  }

  .site-side-label:first-child {
    margin-top: 0;
  }
}