/* Cursor Manual — Apple-inspired design system */
:root {
  --apple-bg: #fbfbfd;
  --apple-bg-secondary: #f5f5f7;
  --apple-surface: #ffffff;
  --apple-text: #1d1d1f;
  --apple-text-secondary: #6e6e73;
  --apple-text-tertiary: #86868b;
  --apple-blue: #0071e3;
  --apple-blue-hover: #0077ed;
  --apple-blue-soft: rgba(0, 113, 227, 0.08);
  --apple-green: #34c759;
  --apple-orange: #ff9500;
  --apple-red: #ff3b30;
  --apple-purple: #af52de;
  --apple-border: rgba(0, 0, 0, 0.06);
  --apple-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --apple-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
  --apple-shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.08);
  --apple-radius: 18px;
  --apple-radius-sm: 12px;
  --apple-radius-pill: 980px;
  --apple-font: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', 'Noto Sans JP', sans-serif;
  --apple-mono: 'SF Mono', 'Menlo', 'Monaco', 'Consolas', monospace;
  --apple-ease: cubic-bezier(0.25, 0.1, 0.25, 1);
  --apple-nav-h: 52px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
body {
  font-family: var(--apple-font);
  background: var(--apple-bg);
  color: var(--apple-text);
  font-size: 17px;
  line-height: 1.58824;
  letter-spacing: -0.022em;
}
a { color: var(--apple-blue); text-decoration: none; transition: color 0.2s var(--apple-ease); }
a:hover { text-decoration: underline; }
code {
  font-family: var(--apple-mono);
  font-size: 0.9em;
  background: var(--apple-bg-secondary);
  padding: 0.15em 0.45em;
  border-radius: 6px;
  color: var(--apple-text);
}
strong { font-weight: 600; }

/* ── Nav (glass) ── */
.topbar {
  position: sticky;
  top: 0;
  z-index: 200;
  height: var(--apple-nav-h);
  padding: 0 max(22px, env(safe-area-inset-right)) 0 max(22px, env(safe-area-inset-left));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: rgba(251, 251, 253, 0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--apple-border);
}
.topbar-logo {
  font-size: 17px;
  font-weight: 600;
  color: var(--apple-text);
  letter-spacing: -0.025em;
}
.topbar-logo span { color: var(--apple-text-secondary); font-weight: 400; }
.topbar-nav { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.topbar-nav a, .topbar-nav button {
  font-family: var(--apple-font);
  font-size: 14px;
  font-weight: 400;
  letter-spacing: -0.016em;
  padding: 7px 16px;
  border-radius: var(--apple-radius-pill);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.25s var(--apple-ease);
}
.btn-back {
  background: transparent;
  color: var(--apple-blue);
}
.btn-back:hover { background: var(--apple-blue-soft); text-decoration: none; }
.btn-print {
  background: var(--apple-blue);
  color: #fff;
}
.btn-print:hover { background: var(--apple-blue-hover); }
.btn-share {
  background: transparent;
  color: var(--apple-blue);
  border: 1px solid rgba(0, 113, 227, 0.35);
}
.btn-share:hover { background: var(--apple-blue-soft); }

/* ── Share box ── */
.share-box {
  background: var(--apple-surface);
  border-radius: var(--apple-radius);
  padding: 24px 28px;
  margin-bottom: 16px;
  box-shadow: var(--apple-shadow-lg);
  border: 1px solid var(--apple-border);
  text-align: center;
}
.share-box-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--apple-blue);
  margin-bottom: 10px;
}
.share-box-url {
  margin-bottom: 18px;
}
.share-box-url code {
  display: block;
  font-size: 14px;
  word-break: break-all;
  background: var(--apple-bg-secondary);
  padding: 14px 16px;
  border-radius: var(--apple-radius-sm);
  color: var(--apple-text);
  font-family: var(--apple-mono);
}
.share-box-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}
.btn-share-primary {
  font-family: var(--apple-font);
  font-size: 15px;
  font-weight: 500;
  padding: 12px 24px;
  border-radius: var(--apple-radius-pill);
  border: none;
  cursor: pointer;
  background: var(--apple-blue);
  color: #fff;
  transition: background 0.25s var(--apple-ease);
}
.btn-share-primary:hover { background: var(--apple-blue-hover); }
.btn-share-secondary {
  display: inline-flex;
  align-items: center;
  font-size: 15px;
  font-weight: 500;
  padding: 12px 24px;
  border-radius: var(--apple-radius-pill);
  border: 1px solid var(--apple-border);
  background: var(--apple-surface);
  color: var(--apple-text);
  text-decoration: none;
  transition: background 0.25s var(--apple-ease);
}
.btn-share-secondary:hover {
  background: var(--apple-bg-secondary);
  text-decoration: none;
}
.btn-share-inline {
  font-family: var(--apple-font);
  font-size: 13px;
  padding: 6px 14px;
  border-radius: var(--apple-radius-pill);
  border: 1px solid rgba(0, 113, 227, 0.35);
  background: transparent;
  color: var(--apple-blue);
  cursor: pointer;
}
.btn-share-inline:hover { background: var(--apple-blue-soft); }

.share-links-grid {
  display: grid; gap: 10px; margin-top: 16px;
}
.share-link-item {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  background: #fff; border: 1px solid var(--apple-border);
  border-radius: var(--apple-radius-sm); padding: 10px 12px;
}
.share-link-item-label {
  font-size: 13px; font-weight: 700; color: var(--apple-text);
  min-width: 100px;
}
.share-link-item-url {
  flex: 1; min-width: 180px;
  font-size: 12px; color: var(--apple-text-secondary);
  word-break: break-all;
}
.share-link-item-url code {
  background: var(--apple-bg-secondary); padding: 4px 8px;
  border-radius: 6px; font-size: 11px;
}
.btn-share-section {
  font-family: var(--apple-font); font-size: 12px; font-weight: 600;
  padding: 6px 12px; border-radius: var(--apple-radius-pill);
  border: 1px solid rgba(0, 113, 227, 0.35);
  background: var(--apple-blue-soft); color: var(--apple-blue);
  cursor: pointer; white-space: nowrap;
}
.btn-share-section:hover { background: rgba(0, 113, 227, 0.15); }
.section-share-bar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; flex-wrap: wrap;
  background: var(--apple-blue-soft); border: 1px solid rgba(0,113,227,0.2);
  border-radius: var(--apple-radius-sm); padding: 12px 16px; margin-bottom: 20px;
}
.section-share-bar p { margin: 0; font-size: 14px; color: var(--apple-text-secondary); }
.section-share-bar strong { color: var(--apple-text); }
.section-share-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.btn-line-share {
  font-family: var(--apple-font); font-size: 13px; font-weight: 600;
  padding: 10px 16px; border-radius: var(--apple-radius-pill);
  border: none; background: #06C755; color: #fff; cursor: pointer;
  text-decoration: none; display: inline-block;
}
.btn-line-share:hover { background: #05b04d; }

.share-toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(16px);
  background: rgba(29, 29, 31, 0.92);
  color: #fff;
  padding: 12px 22px;
  border-radius: var(--apple-radius-pill);
  font-size: 14px;
  font-weight: 500;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s var(--apple-ease), transform 0.3s var(--apple-ease);
  z-index: 300;
  backdrop-filter: blur(12px);
}
.share-toast.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ── Device cards (MacBook / iPad) ── */
.device-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin: 24px 0;
}
.device-grid-ipad { margin-top: 20px; }
.device-card {
  background: var(--apple-surface);
  border: 1px solid var(--apple-border);
  border-radius: var(--apple-radius);
  padding: 24px 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  box-shadow: var(--apple-shadow-sm);
  transition: box-shadow 0.3s var(--apple-ease), transform 0.3s var(--apple-ease);
}
.device-card:hover {
  box-shadow: var(--apple-shadow);
  transform: translateY(-2px);
}
.device-icon { font-size: 32px; line-height: 1; }
.device-card h4 {
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.024em;
  color: var(--apple-text);
}
.device-card p {
  font-size: 14px;
  line-height: 1.5;
  color: var(--apple-text-secondary);
  flex: 1;
}
.device-card .btn-dl {
  width: 100%;
  justify-content: center;
  font-size: 14px;
  padding: 12px 16px;
  margin: 0;
}
.device-note {
  font-size: 12px;
  color: var(--apple-text-tertiary);
  margin: 0;
}

/* ── Hero ── */
.hero {
  text-align: center;
  padding: 72px 24px 88px;
  background: var(--apple-bg);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(0, 113, 227, 0.12), transparent),
    radial-gradient(ellipse 60% 40% at 80% 60%, rgba(175, 82, 222, 0.06), transparent);
  pointer-events: none;
}
.hero > * { position: relative; }
.hero-tag {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--apple-blue);
  margin-bottom: 16px;
}
.hero h1 {
  font-size: clamp(40px, 6vw, 56px);
  font-weight: 700;
  letter-spacing: -0.045em;
  line-height: 1.05;
  color: var(--apple-text);
  margin-bottom: 16px;
}
.hero-desc {
  font-size: clamp(19px, 2.5vw, 21px);
  font-weight: 400;
  line-height: 1.47;
  letter-spacing: -0.022em;
  color: var(--apple-text-secondary);
  max-width: 640px;
  margin: 0 auto 32px;
}
.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}
.hero-badge {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--apple-text-secondary);
  background: var(--apple-surface);
  border: 1px solid var(--apple-border);
  padding: 8px 16px;
  border-radius: var(--apple-radius-pill);
  box-shadow: var(--apple-shadow-sm);
}

/* ── TOC ── */
.toc-wrap {
  max-width: 980px;
  margin: -44px auto 0;
  padding: 0 22px;
  position: relative;
  z-index: 10;
}
.toc {
  background: var(--apple-surface);
  border-radius: var(--apple-radius);
  padding: 32px 36px;
  box-shadow: var(--apple-shadow-lg);
  border: 1px solid var(--apple-border);
}
.toc h2 {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
  color: var(--apple-text);
}
.toc ol {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 2px;
}
.toc li { margin: 0; }
.toc a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: var(--apple-radius-sm);
  font-size: 16px;
  font-weight: 400;
  color: var(--apple-text);
  text-decoration: none;
  transition: background 0.2s var(--apple-ease);
}
.toc a::before {
  content: attr(data-num);
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--apple-bg-secondary);
  color: var(--apple-text-secondary);
  font-size: 13px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
}
.toc a:hover {
  background: var(--apple-bg-secondary);
  text-decoration: none;
}
.toc a:hover::before {
  background: var(--apple-blue);
  color: #fff;
}

/* ── Main ── */
.main {
  max-width: 980px;
  margin: 0 auto;
  padding: 56px 22px 100px;
}

/* ── Chapter ── */
.chapter {
  background: var(--apple-surface);
  border-radius: var(--apple-radius);
  padding: 44px 40px;
  margin-bottom: 28px;
  box-shadow: var(--apple-shadow);
  border: 1px solid var(--apple-border);
  scroll-margin-top: calc(var(--apple-nav-h) + 16px);
}
.chapter-num {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--apple-blue);
  margin-bottom: 10px;
}
.chapter h2 {
  font-size: clamp(28px, 4vw, 36px);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.1;
  margin-bottom: 12px;
  color: var(--apple-text);
}
.chapter-lead {
  font-size: 19px;
  line-height: 1.47;
  letter-spacing: -0.022em;
  color: var(--apple-text-secondary);
  margin-bottom: 32px;
}
.section-head {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin: 36px 0 14px;
  color: var(--apple-text);
}
.section-subhead {
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.024em;
  margin: 24px 0 10px;
  color: var(--apple-text);
}

/* ── Term box ── */
.term-box {
  background: var(--apple-bg-secondary);
  border-radius: var(--apple-radius-sm);
  padding: 20px 24px;
  margin: 24px 0;
  font-size: 17px;
  border: none;
}
.term-box strong {
  display: block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--apple-text-secondary);
  margin-bottom: 8px;
}

/* ── Steps ── */
.steps { list-style: none; counter-reset: step; padding: 0; margin: 24px 0; }
.steps > li {
  counter-increment: step;
  position: relative;
  padding: 0 0 32px 56px;
  border-left: 1px solid var(--apple-border);
  margin-left: 16px;
}
.steps > li:last-child { border-left-color: transparent; padding-bottom: 0; }
.steps > li::before {
  content: counter(step);
  position: absolute;
  left: -18px;
  top: 0;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--apple-text);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
}
.step-title {
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.024em;
  margin-bottom: 8px;
  color: var(--apple-text);
}
.step-body { font-size: 17px; color: var(--apple-text-secondary); }

/* ── Notes ── */
.note {
  border-radius: var(--apple-radius-sm);
  padding: 18px 22px;
  margin: 24px 0;
  font-size: 16px;
  line-height: 1.5;
}
.note-warn {
  background: rgba(255, 59, 48, 0.06);
  border: 1px solid rgba(255, 59, 48, 0.15);
  color: #d70015;
}
.note-tip {
  background: rgba(52, 199, 89, 0.06);
  border: 1px solid rgba(52, 199, 89, 0.15);
  color: #248a3d;
}
.note-info {
  background: rgba(0, 113, 227, 0.06);
  border: 1px solid rgba(0, 113, 227, 0.12);
  color: #0066cc;
}
.note strong {
  display: block;
  margin-bottom: 6px;
  font-size: 15px;
  font-weight: 600;
}

/* ── Buttons ── */
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; margin: 24px 0; }
.btn-dl {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--apple-blue);
  color: #fff !important;
  text-decoration: none !important;
  padding: 14px 22px;
  border-radius: var(--apple-radius-pill);
  font-size: 16px;
  font-weight: 500;
  letter-spacing: -0.016em;
  box-shadow: none;
  transition: background 0.25s var(--apple-ease), transform 0.2s var(--apple-ease);
}
.btn-dl:hover {
  background: var(--apple-blue-hover);
  transform: scale(1.02);
  text-decoration: none !important;
}
.btn-dl.mac { background: var(--apple-text); }
.btn-dl.mac:hover { background: #333; }
.btn-dl.win { background: #0078d4; }
.btn-dl.green { background: var(--apple-green); }

/* ── OS tabs (segmented control) ── */
.os-tabs {
  display: inline-flex;
  gap: 0;
  margin: 16px 0;
  padding: 3px;
  background: var(--apple-bg-secondary);
  border-radius: var(--apple-radius-pill);
}
.os-tab {
  padding: 8px 20px;
  border-radius: var(--apple-radius-pill);
  border: none;
  background: transparent;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  font-family: var(--apple-font);
  color: var(--apple-text-secondary);
  transition: all 0.25s var(--apple-ease);
}
.os-tab.active {
  background: var(--apple-surface);
  color: var(--apple-text);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
}
.os-panel { display: none; }
.os-panel.active { display: block; }

/* ── Screen mockups ── */
.screen {
  background: var(--apple-bg-secondary);
  border-radius: var(--apple-radius);
  padding: 16px;
  margin: 28px 0;
  border: 1px solid var(--apple-border);
}
.screen-cap {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--apple-text-tertiary);
  text-align: center;
  margin-bottom: 12px;
}
.screen img {
  width: 100%;
  border-radius: var(--apple-radius-sm);
  margin-bottom: 14px;
  border: 1px solid var(--apple-border);
}
.screen-window {
  background: var(--apple-surface);
  border-radius: var(--apple-radius-sm);
  overflow: hidden;
  box-shadow: var(--apple-shadow);
}
.screen-bar {
  background: var(--apple-bg-secondary);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid var(--apple-border);
}
.screen-dot { width: 11px; height: 11px; border-radius: 50%; }
.screen-dot.r { background: #ff5f57; }
.screen-dot.y { background: #febc2e; }
.screen-dot.g { background: #28c840; }
.screen-title {
  font-size: 12px;
  color: var(--apple-text-tertiary);
  margin-left: 6px;
  font-weight: 500;
}
.screen-body { padding: 20px; min-height: 100px; }

/* Cursor mock */
.cursor-mock { display: grid; grid-template-columns: 180px 1fr; min-height: 220px; }
.cursor-sidebar { background: #1e1e1e; padding: 12px; }
.cursor-sidebar-item {
  font-size: 11px;
  color: rgba(255, 255, 255, 0.45);
  padding: 6px 10px;
  border-radius: 6px;
  margin-bottom: 2px;
}
.cursor-sidebar-item.on { background: rgba(255, 255, 255, 0.08); color: #fff; }
.cursor-main { background: #1e1e1e; display: grid; grid-template-rows: 1fr auto; }
.cursor-code { padding: 16px; font-family: var(--apple-mono); font-size: 11px; color: #d4d4d4; }
.cursor-chat { background: #252526; border-top: 1px solid rgba(255, 255, 255, 0.06); padding: 12px 16px; }
.cursor-chat-label { font-size: 11px; color: #569cd6; font-weight: 600; margin-bottom: 6px; }
.cursor-chat-input {
  background: rgba(255, 255, 255, 0.06);
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.65);
}

/* ── Tables ── */
.compare-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 24px 0;
  font-size: 15px;
  border-radius: var(--apple-radius-sm);
  overflow: hidden;
  border: 1px solid var(--apple-border);
}
.compare-table th {
  background: var(--apple-bg-secondary);
  color: var(--apple-text);
  padding: 14px 18px;
  text-align: left;
  font-weight: 600;
  font-size: 13px;
  letter-spacing: -0.01em;
  border-bottom: 1px solid var(--apple-border);
}
.compare-table td {
  padding: 14px 18px;
  vertical-align: top;
  border-bottom: 1px solid var(--apple-border);
  color: var(--apple-text-secondary);
}
.compare-table tr:last-child td { border-bottom: none; }
.compare-table tr:nth-child(even) td { background: rgba(0, 0, 0, 0.015); }
.compare-table td strong { color: var(--apple-text); }

/* ── Code ── */
.code-block {
  background: #1d1d1f;
  color: #f5f5f7;
  border-radius: var(--apple-radius-sm);
  padding: 20px 22px;
  font-family: var(--apple-mono);
  font-size: 13px;
  line-height: 1.6;
  overflow-x: auto;
  margin: 20px 0;
  white-space: pre-wrap;
  word-break: break-all;
}
.code-block .comment { color: #86868b; }

/* ── Lang cards ── */
.lang-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin: 24px 0;
}
.lang-card {
  border: 1px solid var(--apple-border);
  border-radius: var(--apple-radius);
  padding: 24px;
  background: var(--apple-surface);
  transition: box-shadow 0.3s var(--apple-ease), transform 0.3s var(--apple-ease);
}
.lang-card:hover {
  box-shadow: var(--apple-shadow);
  transform: translateY(-2px);
}
.lang-card h3 {
  font-size: 21px;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
}
.lang-card .analogy {
  font-size: 14px;
  color: var(--apple-text-tertiary);
  margin-bottom: 12px;
}
.lang-card p { font-size: 15px; color: var(--apple-text-secondary); }

/* ── Prompt box ── */
.prompt-box {
  background: var(--apple-bg-secondary);
  border: 1px solid var(--apple-border);
  border-radius: var(--apple-radius-sm);
  padding: 22px 24px;
  margin: 16px 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--apple-text-secondary);
}
.prompt-box .label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--apple-purple);
  margin-bottom: 10px;
}

/* ── Accordion (iOS Settings style) ── */
.accordion-group { display: flex; flex-direction: column; gap: 8px; margin: 24px 0; }
.accordion {
  border-radius: var(--apple-radius-sm);
  overflow: hidden;
  background: var(--apple-surface);
  border: 1px solid var(--apple-border);
}
.accordion > summary {
  list-style: none;
  cursor: pointer;
  padding: 16px 20px;
  font-size: 17px;
  font-weight: 500;
  letter-spacing: -0.022em;
  color: var(--apple-text);
  background: var(--apple-surface);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  transition: background 0.2s var(--apple-ease);
}
.accordion > summary:hover { background: var(--apple-bg-secondary); }
.accordion > summary::-webkit-details-marker { display: none; }
.accordion > summary::after {
  content: '+';
  font-size: 22px;
  font-weight: 300;
  color: var(--apple-text-tertiary);
  line-height: 1;
  transition: transform 0.25s var(--apple-ease);
}
.accordion[open] > summary::after {
  content: '−';
  color: var(--apple-blue);
}
.accordion[open] > summary {
  border-bottom: 1px solid var(--apple-border);
}
.accordion-body { padding: 16px 20px 20px; background: var(--apple-bg); }

.api-card {
  border-radius: var(--apple-radius-sm);
  padding: 18px 20px;
  margin-bottom: 10px;
  background: var(--apple-surface);
  border: 1px solid var(--apple-border);
}
.api-card:last-child { margin-bottom: 0; }
.api-card h4 {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.022em;
  margin-bottom: 6px;
  color: var(--apple-text);
}
.api-card .api-use { font-size: 14px; color: var(--apple-text-tertiary); margin-bottom: 10px; }
.api-card .api-meta { font-size: 14px; line-height: 1.6; color: var(--apple-text-secondary); }
.api-card code { background: var(--apple-bg-secondary); }
.api-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: var(--apple-radius-pill);
  margin-right: 6px;
  margin-bottom: 6px;
}
.api-tag.ai { background: rgba(175, 82, 222, 0.12); color: #8944ab; }
.api-tag.data { background: rgba(52, 199, 89, 0.12); color: #248a3d; }
.api-tag.pay { background: rgba(255, 149, 0, 0.12); color: #c93400; }
.api-tag.infra { background: rgba(0, 113, 227, 0.1); color: #0066cc; }

/* ── Score card ── */
.score-card {
  background: linear-gradient(145deg, #1d1d1f 0%, #2d2d2f 100%);
  color: #f5f5f7;
  border-radius: var(--apple-radius);
  padding: 36px 32px;
  margin: 28px 0;
  text-align: center;
  box-shadow: var(--apple-shadow-lg);
}
.score-num {
  font-size: 64px;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: #ffd60a;
  line-height: 1;
}
.score-label { font-size: 15px; color: rgba(255, 255, 255, 0.55); margin-top: 10px; }
.score-bar-wrap {
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--apple-radius-pill);
  height: 6px;
  margin: 24px 0;
  overflow: hidden;
}
.score-bar {
  height: 100%;
  background: linear-gradient(90deg, #ff3b30, #ffd60a, #34c759);
  border-radius: var(--apple-radius-pill);
}
.score-items { text-align: left; margin-top: 24px; }
.score-item {
  display: flex;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 15px;
}
.score-item:last-child { border-bottom: none; }

/* ── Meeting mock ── */
.meeting-mock {
  background: var(--apple-bg-secondary);
  border-radius: var(--apple-radius);
  padding: 24px;
  margin: 24px 0;
  border: 1px solid var(--apple-border);
}
.meeting-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.ceo-card {
  background: var(--apple-surface);
  border-radius: var(--apple-radius-sm);
  padding: 20px 16px;
  text-align: center;
  border: 1px solid var(--apple-border);
  transition: transform 0.3s var(--apple-ease);
}
.ceo-card:hover { transform: translateY(-3px); box-shadow: var(--apple-shadow); }
.ceo-avatar { font-size: 40px; margin-bottom: 10px; }
.ceo-name { font-size: 15px; font-weight: 600; margin-bottom: 4px; }
.ceo-role { font-size: 12px; color: var(--apple-text-tertiary); margin-bottom: 12px; }
.ceo-bubble {
  background: var(--apple-bg-secondary);
  border-radius: var(--apple-radius-sm);
  padding: 12px 14px;
  font-size: 13px;
  text-align: left;
  line-height: 1.55;
  color: var(--apple-text-secondary);
}

/* ── Terminal ── */
.terminal-mock {
  background: #1d1d1f;
  color: #f5f5f7;
  border-radius: var(--apple-radius-sm);
  padding: 18px 20px;
  font-family: var(--apple-mono);
  font-size: 13px;
  line-height: 1.65;
  margin: 16px 0;
}
.terminal-prompt { color: var(--apple-green); }
.terminal-cmd { color: #fff; }
.terminal-out { color: #86868b; }

/* ── Summary chapter ── */
.chapter-summary {
  background: linear-gradient(180deg, var(--apple-bg-secondary) 0%, var(--apple-surface) 100%) !important;
  border: 1px solid var(--apple-border) !important;
}
.chapter-summary h2 { text-align: center; }
.chapter-summary ol {
  padding-left: 1.2em;
  font-size: 17px;
  font-weight: 400;
  color: var(--apple-text-secondary);
}
.chapter-summary ol strong { color: var(--apple-text); }
.chapter-summary p { text-align: center; color: var(--apple-text-tertiary); }

.chapter > img {
  width: 100%;
  border-radius: var(--apple-radius);
  margin: 28px 0;
  border: 1px solid var(--apple-border);
  box-shadow: var(--apple-shadow);
}

/* ── レベル別（何ができるか） ── */
.level-nav {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
  margin: 28px 0;
}
.level-card {
  display: block;
  text-decoration: none !important;
  color: inherit;
  background: var(--apple-surface);
  border: 1px solid var(--apple-border);
  border-radius: var(--apple-radius);
  padding: 22px 20px;
  transition: box-shadow 0.3s var(--apple-ease), transform 0.3s var(--apple-ease);
}
.level-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--apple-shadow-lg);
  text-decoration: none !important;
}
.level-card.lv-beginner { border-top: 4px solid var(--apple-green); }
.level-card.lv-basic { border-top: 4px solid var(--apple-blue); }
.level-card.lv-middle { border-top: 4px solid var(--apple-orange); }
.level-card.lv-advanced { border-top: 4px solid var(--apple-purple); }
.level-tag {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 8px;
  display: block;
}
.lv-beginner .level-tag { color: var(--apple-green); }
.lv-basic .level-tag { color: var(--apple-blue); }
.lv-middle .level-tag { color: var(--apple-orange); }
.lv-advanced .level-tag { color: var(--apple-purple); }
.level-card h3 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
  color: var(--apple-text);
}
.level-card p { font-size: 14px; line-height: 1.55; color: var(--apple-text-secondary); margin: 0; }
.can-list { list-style: none; padding: 0; margin: 16px 0; display: grid; gap: 10px; }
.can-list li {
  display: flex; gap: 12px; align-items: flex-start;
  padding: 14px 16px; background: var(--apple-bg-secondary);
  border-radius: var(--apple-radius-sm); font-size: 16px; line-height: 1.55;
  color: var(--apple-text-secondary);
}
.can-list li strong { color: var(--apple-text); display: block; margin-bottom: 2px; }
.can-icon {
  flex-shrink: 0; width: 32px; height: 32px; border-radius: 8px;
  background: var(--apple-surface); display: flex; align-items: center; justify-content: center;
  font-size: 16px; border: 1px solid var(--apple-border);
}
.link-card-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.link-card {
  flex: 1; min-width: 220px; padding: 18px 20px; border-radius: var(--apple-radius-sm);
  border: 1px solid var(--apple-border); background: var(--apple-bg-secondary);
  text-decoration: none !important; color: var(--apple-text); transition: background 0.2s;
}
.link-card:hover { background: var(--apple-blue-soft); text-decoration: none !important; }
.link-card strong { display: block; font-size: 15px; margin-bottom: 4px; }
.link-card span { font-size: 13px; color: var(--apple-text-secondary); }

/* ── コピペプロンプト ── */
.copy-prompt-wrap { margin: 14px 0 20px; }
.copy-prompt-head {
  display: flex; align-items: center; justify-content: space-between;
  gap: 10px; margin-bottom: 8px; flex-wrap: wrap;
}
.copy-prompt-head strong { font-size: 15px; color: var(--apple-text); }
.copy-prompt-head span { font-size: 12px; color: var(--apple-text-tertiary); }
.btn-copy-prompt {
  font-family: var(--apple-font);
  font-size: 13px; font-weight: 600;
  padding: 7px 14px; border-radius: var(--apple-radius-pill);
  border: 1px solid rgba(0, 113, 227, 0.35);
  background: var(--apple-blue-soft);
  color: var(--apple-blue);
  cursor: pointer;
  transition: background 0.2s;
}
.btn-copy-prompt:hover { background: rgba(0, 113, 227, 0.15); }
.btn-copy-prompt.copied { background: rgba(52, 199, 89, 0.15); color: var(--apple-green); border-color: rgba(52, 199, 89, 0.35); }
.copy-prompt-text {
  background: #1d1d1f; color: #f5f5f7;
  border-radius: var(--apple-radius-sm);
  padding: 18px 20px;
  font-size: 14px; line-height: 1.65;
  white-space: pre-wrap; word-break: break-word;
  font-family: var(--apple-font);
  max-height: 320px; overflow-y: auto;
}

/* ── プロンプト＋画面セット ── */
.prompt-block { margin: 28px 0 36px; }
.prompt-block-label {
  font-size: 13px; font-weight: 700; color: var(--apple-blue);
  letter-spacing: 0.04em; text-transform: uppercase;
  margin-bottom: 10px;
}
.flow-steps {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px; margin: 16px 0 24px;
}
.flow-step {
  background: var(--apple-bg-secondary); border-radius: var(--apple-radius-sm);
  padding: 14px 12px; text-align: center; border: 1px solid var(--apple-border);
}
.flow-step-num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--apple-blue); color: #fff;
  font-size: 14px; font-weight: 700; margin-bottom: 8px;
}
.flow-step p { font-size: 13px; line-height: 1.5; color: var(--apple-text-secondary); margin: 0; }
.flow-arrow { display: none; }
.prompt-nav-pills {
  display: flex; flex-wrap: wrap; gap: 8px; margin: 20px 0 28px;
}
.prompt-nav-pill {
  display: inline-block; padding: 8px 14px; border-radius: var(--apple-radius-pill);
  background: var(--apple-bg-secondary); border: 1px solid var(--apple-border);
  font-size: 14px; font-weight: 600; color: var(--apple-text);
  text-decoration: none; transition: background 0.2s;
}
.prompt-nav-pill:hover { background: var(--apple-blue-soft); border-color: rgba(0,113,227,0.3); }
.plain-word {
  background: #F0FDF4; border-left: 4px solid var(--apple-green);
  padding: 12px 16px; border-radius: 0 var(--apple-radius-sm) var(--apple-radius-sm) 0;
  font-size: 15px; margin: 12px 0;
}
.plain-word strong { color: #166534; }

/* ── Footer ── */
.footer {
  text-align: center;
  padding: 48px 24px;
  font-size: 12px;
  color: var(--apple-text-tertiary);
  background: var(--apple-bg-secondary);
  border-top: 1px solid var(--apple-border);
}
.footer a { color: var(--apple-blue); }

/* ── Inline mock helpers (override inline styles) ── */
.screen-body[style] { font-size: 15px !important; }
.screen-window .screen-body div[style*="background:#2DA44E"],
.screen-window .screen-body div[style*="background: #2DA44E"] {
  border-radius: var(--apple-radius-pill) !important;
  font-weight: 500 !important;
}
.screen-window .screen-body div[style*="background:#2563EB"],
.screen-window .screen-body div[style*="background: #2563EB"] {
  border-radius: var(--apple-radius-pill) !important;
  font-weight: 500 !important;
}

@media (max-width: 734px) {
  body { font-size: 16px; }
  .hero { padding: 56px 20px 72px; }
  .chapter { padding: 32px 22px; }
  .toc { padding: 24px 20px; }
  .steps > li { padding-left: 48px; margin-left: 12px; }
  .steps > li::before { width: 32px; height: 32px; left: -16px; font-size: 14px; }
  .cursor-mock { grid-template-columns: 1fr; }
  .meeting-row { grid-template-columns: 1fr; }
  .compare-table { font-size: 14px; }
  .compare-table th, .compare-table td { padding: 12px 14px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

@media print {
  .topbar, .no-print { display: none !important; }
  body { background: #fff; font-size: 11pt; }
  .chapter { break-inside: avoid; box-shadow: none; border: 1px solid #ddd; }
  .hero::before { display: none; }
}