@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --bg: #f0eee9;
  --surface: #ffffff;
  --surface-muted: #f7f5f0;
  --ink: #0E1220;
  --ink-2: #2A2F3F;
  --muted: #6A7083;
  --hairline: rgba(14, 18, 32, 0.08);
  --accent: #1E3AED;
  --accent-soft: rgba(30, 58, 237, 0.08);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }

/* ------- Review index ------- */

.page {
  max-width: 1200px;
  margin: 0 auto;
  padding: 56px 32px 96px;
}

.header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: 48px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 9px;
  background: var(--accent);
  display: grid;
  place-items: center;
  color: white;
  font-weight: 600;
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
  letter-spacing: -0.02em;
}

.brand-title {
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1;
}

.brand-subtitle {
  font-size: 14px;
  color: var(--muted);
  margin-top: 6px;
  letter-spacing: -0.005em;
}

.header-actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: var(--ink);
  color: white;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.005em;
  transition: transform 0.06s ease, opacity 0.15s ease;
}

.btn:hover { opacity: 0.9; }
.btn:active { transform: translateY(1px); }

.btn-secondary {
  background: var(--surface);
  color: var(--ink);
  border: 1px solid var(--hairline);
}

.intro {
  padding: 20px 24px;
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: 14px;
  margin-bottom: 40px;
  font-size: 14px;
  line-height: 1.55;
  color: var(--ink-2);
}

.intro strong { color: var(--ink); font-weight: 600; }

.intro code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12.5px;
  background: var(--bg);
  padding: 2px 6px;
  border-radius: 4px;
}

.section {
  margin-top: 44px;
}

.section-header {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--hairline);
}

.section-title {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 600;
  color: var(--ink);
}

.section-count {
  font-size: 12px;
  color: var(--muted);
  font-family: 'JetBrains Mono', monospace;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: 14px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: transform 0.12s ease, box-shadow 0.12s ease, border-color 0.12s ease;
}

.card:hover {
  transform: translateY(-2px);
  border-color: rgba(30, 58, 237, 0.25);
  box-shadow: 0 8px 24px rgba(14, 18, 32, 0.06);
}

.card-code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.04em;
}

.card-title {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.3;
  color: var(--ink);
}

.card-meta {
  font-size: 12.5px;
  color: var(--muted);
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--hairline);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-meta-actions { display: flex; gap: 8px; }

.tag {
  font-size: 11px;
  padding: 3px 7px;
  border-radius: 5px;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 500;
  letter-spacing: 0.01em;
}

.link-pill {
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--surface-muted);
  color: var(--ink);
  font-weight: 500;
  border: 1px solid var(--hairline);
}

.link-pill:hover { background: var(--ink); color: white; border-color: var(--ink); }

footer {
  margin-top: 80px;
  padding-top: 24px;
  border-top: 1px solid var(--hairline);
  font-size: 12.5px;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

footer code {
  font-family: 'JetBrains Mono', monospace;
  background: var(--surface);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--hairline);
}

/* ------- Prototype shell ------- */

.proto {
  display: grid;
  grid-template-columns: 320px 1fr;
  height: 100vh;
  overflow: hidden;
}

.proto-sidebar {
  background: var(--surface);
  border-right: 1px solid var(--hairline);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.proto-sidebar-header {
  padding: 24px 24px 18px;
  border-bottom: 1px solid var(--hairline);
}

.proto-sidebar-title {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 10px;
}

.proto-sidebar-sub {
  font-size: 12px;
  color: var(--muted);
  margin-top: 6px;
}

.proto-search {
  margin: 14px 24px 0;
  padding: 9px 12px;
  border-radius: 8px;
  border: 1px solid var(--hairline);
  background: var(--bg);
  font-size: 13px;
  font-family: inherit;
  color: var(--ink);
  outline: none;
}

.proto-search:focus { border-color: var(--accent); }

.proto-nav {
  flex: 1;
  overflow-y: auto;
  padding: 16px 12px 24px;
}

.proto-nav-section {
  margin-bottom: 18px;
}

.proto-nav-section-title {
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-weight: 600;
  color: var(--muted);
  padding: 8px 12px;
}

.proto-nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  color: var(--ink);
  transition: background 0.1s;
  margin: 2px 0;
}

.proto-nav-item:hover { background: var(--surface-muted); }

.proto-nav-item.active {
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 500;
}

.proto-nav-item-code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--muted);
  font-weight: 500;
  flex-shrink: 0;
  min-width: 42px;
}

.proto-nav-item.active .proto-nav-item-code { color: var(--accent); }

.proto-nav-item-name {
  font-size: 13.5px;
  letter-spacing: -0.005em;
  line-height: 1.3;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.proto-main {
  display: flex;
  flex-direction: column;
  background: var(--bg);
  overflow: hidden;
}

.proto-toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  background: var(--surface);
  border-bottom: 1px solid var(--hairline);
}

.proto-tb-title {
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.01em;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.proto-tb-code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 3px 8px;
  border-radius: 4px;
  font-weight: 500;
}

.proto-tb-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--hairline);
  border-radius: 8px;
  background: var(--surface);
  color: var(--ink);
  font-size: 14px;
  cursor: pointer;
}

.proto-tb-btn:hover { background: var(--surface-muted); }
.proto-tb-btn:disabled { opacity: 0.4; cursor: default; }

.proto-tb-link {
  font-size: 12.5px;
  color: var(--muted);
  text-decoration: none;
  padding: 6px 10px;
  border-radius: 6px;
}

.proto-tb-link:hover { background: var(--surface-muted); color: var(--ink); }

.proto-frame-wrap {
  flex: 1;
  display: grid;
  place-items: center;
  overflow: auto;
  padding: 0;
}

.proto-frame {
  width: 100%;
  height: 100%;
  border: 0;
  background: var(--bg);
  display: block;
}

.proto-empty {
  text-align: center;
  color: var(--muted);
  padding: 60px 40px;
}

.proto-empty h2 {
  font-size: 20px;
  font-weight: 600;
  color: var(--ink);
  margin: 0 0 8px;
}

.proto-empty p { margin: 0; font-size: 14px; line-height: 1.5; }

@media (max-width: 860px) {
  .proto { grid-template-columns: 1fr; grid-template-rows: auto 1fr; }
  .proto-sidebar { max-height: 40vh; }
}