/* Architecture & design library — multi-deck PDF viewer */
:root {
  --bg: #050810;
  --surface: #0a1220;
  --surface-2: #0f1a2e;
  --border: rgba(148, 163, 184, 0.22);
  --text: #e8f4ff;
  --text-muted: #8aaabb;
  --text-dim: #5a7a8a;
  --accent: #00e5ff;
  --accent-soft: rgba(0, 229, 255, 0.12);
  --warn: #f59e0b;
  --font-sans: "Space Grotesk", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.55;
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(0, 229, 255, 0.08), transparent),
    linear-gradient(180deg, var(--bg) 0%, #070b12 100%);
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.arch-page {
  max-width: 1280px;
  margin: 0 auto;
  padding: 1.25rem 1.25rem 3rem;
}

.arch-header h1 {
  margin: 0 0 0.35rem;
  font-size: clamp(1.55rem, 4vw, 2.1rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.arch-header .arch-eyebrow {
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.arch-header .arch-lead {
  margin: 0;
  max-width: 52rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.arch-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.arch-meta span {
  padding: 0.25rem 0.55rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--surface);
}

.arch-deck-bar {
  margin-top: 1.5rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
}

.arch-deck-bar-label {
  margin: 0 0 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.arch-deck-picker {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.arch-deck-picker button {
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}

.arch-deck-picker button:hover {
  color: var(--text);
  border-color: rgba(0, 229, 255, 0.3);
}

.arch-deck-picker button.is-active {
  color: var(--accent);
  border-color: rgba(0, 229, 255, 0.5);
  background: var(--accent-soft);
}

.arch-deck-picker button.is-planned {
  opacity: 0.75;
  font-style: italic;
}

.arch-deck-intro {
  margin-top: 1.25rem;
}

.arch-deck-title {
  margin: 0 0 0.35rem;
  font-size: 1.15rem;
  font-weight: 600;
}

.arch-deck-summary {
  margin: 0;
  max-width: 52rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.arch-deck-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.65rem;
}

.arch-deck-tags span {
  padding: 0.2rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-dim);
  background: var(--surface);
}

.arch-planned-panel {
  padding: 2rem 1.5rem;
  border: 1px dashed rgba(245, 158, 11, 0.45);
  border-radius: 10px;
  background: rgba(245, 158, 11, 0.06);
}

.arch-planned-panel h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
}

.arch-planned-panel p {
  margin: 0 0 0.65rem;
  color: var(--text-muted);
  font-size: 0.88rem;
}

.arch-planned-hint {
  font-family: var(--font-mono);
  font-size: 0.72rem !important;
  line-height: 1.5;
}

.arch-planned-hint code {
  color: var(--accent);
}

.arch-layout {
  display: grid;
  grid-template-columns: minmax(0, 260px) minmax(0, 1fr);
  gap: 1.25rem;
  margin-top: 1.25rem;
  align-items: start;
}

.arch-toc {
  position: sticky;
  top: 1rem;
  max-height: calc(100vh - 2rem);
  overflow: auto;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
}

.arch-toc h2 {
  margin: 0 0 0.75rem;
  font-size: 0.72rem;
  font-family: var(--font-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
  font-weight: 500;
}

.arch-toc ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.arch-toc li {
  margin: 0;
}

.arch-toc button {
  display: block;
  width: 100%;
  margin: 0 0 0.2rem;
  padding: 0.4rem 0.5rem;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-size: 0.78rem;
  line-height: 1.35;
  text-align: left;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.arch-toc button:hover {
  background: var(--accent-soft);
  color: var(--text);
}

.arch-toc button.is-active {
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
}

.arch-toc-num {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--text-dim);
  margin-right: 0.35rem;
}

.arch-main {
  min-width: 0;
}

.arch-viewer-wrap {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  overflow: hidden;
}

.arch-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.65rem;
  padding: 0.65rem 0.85rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
}

.arch-slide-title {
  margin: 0;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text);
  flex: 1;
  min-width: 12rem;
}

.arch-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.arch-controls button {
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}

.arch-controls button:hover:not(:disabled) {
  border-color: rgba(0, 229, 255, 0.45);
  color: var(--accent);
  background: var(--accent-soft);
}

.arch-controls button:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.arch-slide-status {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-dim);
  min-width: 4.5rem;
  text-align: center;
}

.arch-slide-stage {
  position: relative;
  min-height: min(72vh, 720px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: var(--bg);
  background-image: radial-gradient(
    ellipse 70% 55% at 50% 40%,
    rgba(0, 229, 255, 0.06),
    transparent 70%
  );
}

.arch-slide-stage canvas {
  display: block;
  max-width: 100%;
  height: auto;
  box-shadow:
    0 0 0 1px var(--border),
    0 12px 40px rgba(0, 0, 0, 0.55);
  border-radius: 4px;
}

.arch-slide-loading {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  background: rgba(5, 8, 16, 0.92);
}

.arch-slide-blocked {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  padding: 1.5rem;
  text-align: center;
  background: #050810;
  border: 1px dashed rgba(0, 229, 255, 0.22);
  border-radius: 4px;
}

.arch-slide-blocked[hidden] {
  display: none;
}

.arch-slide-blocked-title {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  color: #e8f4ff;
}

.arch-slide-blocked-note {
  margin: 0;
  max-width: 22rem;
  font-size: 0.85rem;
  line-height: 1.5;
  color: #8aaabb;
}

.arch-slide-loading[hidden] {
  display: none;
}

.arch-legal-disclaimer {
  margin-top: 1.25rem;
  max-width: 52rem;
  padding: 0.85rem 1rem;
  border-left: 3px solid rgba(245, 158, 11, 0.55);
  border-radius: 0 8px 8px 0;
  background: rgba(245, 158, 11, 0.1);
  font-size: 0.8rem;
  line-height: 1.55;
  color: var(--text-muted);
}

.arch-legal-disclaimer-label {
  margin: 0 0 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--warn);
  font-weight: 500;
}

.arch-legal-disclaimer p:last-child {
  margin: 0;
}

.arch-legal-disclaimer strong {
  color: var(--text);
  font-weight: 600;
}

.arch-note {
  margin: 1rem 0 0;
  padding: 0.85rem 1rem;
  border-radius: 8px;
  border: 1px solid rgba(245, 158, 11, 0.35);
  background: rgba(245, 158, 11, 0.08);
  font-size: 0.82rem;
  color: var(--text-muted);
}

.arch-note--nav {
  border-color: var(--border);
  background: var(--accent-soft);
}

.arch-note strong {
  color: var(--warn);
}

.arch-note--nav strong {
  color: var(--text);
}

.arch-footer {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--text-dim);
}

@media (max-width: 900px) {
  .arch-layout {
    grid-template-columns: 1fr;
  }

  .arch-toc {
    position: static;
    max-height: none;
  }

  .arch-toc ol {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(11rem, 1fr));
    gap: 0.25rem;
  }
}