:root {
  color-scheme: dark;
  --bg: #0c0d10;
  --bg-elev: #14161c;
  --bg-panel: #1b1f27;
  --accent: #c2a86c;
  --accent-soft: rgba(194, 168, 108, 0.18);
  --border: rgba(255, 255, 255, 0.08);
  --text: #f2f0e8;
  --muted: #b6b3a8;
  --danger: #d66f6f;
  --success: #71c08c;
  --shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
  --serif: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", "Palatino", "Times New Roman", serif;
  --mono: "SFMono-Regular", "Consolas", "Liberation Mono", "Menlo", monospace;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: radial-gradient(circle at top, #1b1a24 0%, #0b0c10 45%, #08090d 100%);
  color: var(--text);
  font-family: "Inter", system-ui, sans-serif;
}

.app-shell {
  padding: 32px clamp(24px, 4vw, 60px) 60px;
}

.hero {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  align-items: center;
  justify-content: space-between;
  background: linear-gradient(135deg, rgba(194, 168, 108, 0.18), transparent 55%);
  border: 1px solid var(--border);
  padding: 28px 32px;
  border-radius: 20px;
  box-shadow: var(--shadow);
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.7rem;
  color: var(--muted);
}

.hero-title h1 {
  margin: 8px 0 6px;
  font-family: var(--serif);
  font-size: clamp(2rem, 4vw, 3.4rem);
}

.subtitle {
  margin: 0;
  color: var(--muted);
  max-width: 520px;
}

.hero-actions {
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-width: min(320px, 100%);
}

.upload-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: var(--bg-panel);
  padding: 16px 18px;
  border-radius: 14px;
  border: 1px solid var(--border);
  font-size: 0.9rem;
}

.upload-card input {
  margin-top: 8px;
}

.upload-card .hint {
  color: var(--muted);
  font-size: 0.75rem;
}

button {
  font: inherit;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  padding: 10px 16px;
  border-radius: 10px;
  cursor: pointer;
  transition: 0.2s ease;
}

button.primary {
  background: var(--accent);
  color: #1a1206;
  border-color: transparent;
  font-weight: 600;
}

button.ghost:hover,
button.primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 18px rgba(0, 0, 0, 0.3);
}

.pipeline {
  margin-top: 28px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.pipeline-step {
  background: var(--bg-elev);
  border-radius: 16px;
  padding: 16px;
  border: 1px solid var(--border);
}

.pipeline-step h2 {
  margin: 0 0 8px;
  font-size: 1rem;
  font-family: var(--mono);
  color: var(--accent);
}

.pipeline-step p {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 0.85rem;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.08);
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
}

.workspace {
  margin-top: 32px;
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.6fr);
  gap: 24px;
}

.reader {
  background: var(--bg-elev);
  border-radius: 18px;
  border: 1px solid var(--border);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-height: 520px;
}

.reader-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.reader-header h2 {
  margin: 0 0 4px;
  font-family: var(--serif);
}

.reader-header .meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.layer-toggles {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.layer-toggle {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 0.8rem;
}

.reader-body {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  gap: 16px;
  min-height: 420px;
}

.chapter-nav {
  border-right: 1px solid var(--border);
  padding-right: 12px;
}

.chapter-nav h3 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.chapter-nav ul {
  list-style: none;
  padding: 0;
  margin: 12px 0 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.chapter-nav button {
  width: 100%;
  text-align: left;
}

.reader-content {
  font-family: var(--serif);
  line-height: 1.75;
  font-size: 1.05rem;
}

.reader-content article {
  padding: 16px 20px;
  border-radius: 14px;
  border: 1px solid transparent;
  margin-bottom: 16px;
  background: rgba(255, 255, 255, 0.02);
  transition: border 0.2s ease, background 0.2s ease;
}

.reader-content article.active {
  border-color: var(--accent);
  background: rgba(194, 168, 108, 0.12);
}

.reader-content article.interjection {
  border-left: 4px solid var(--accent);
  background: rgba(194, 168, 108, 0.08);
  font-style: italic;
}

.reader-content h3 {
  margin-top: 0;
  font-size: 1.4rem;
}

.reader-content p {
  margin: 0 0 1rem;
}

.reader-content code {
  background: rgba(255, 255, 255, 0.08);
  padding: 2px 6px;
  border-radius: 6px;
  font-family: var(--mono);
  font-size: 0.85em;
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.panel {
  background: var(--bg-elev);
  border-radius: 16px;
  border: 1px solid var(--border);
  padding: 16px;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.panel-header h3 {
  margin: 0;
  font-size: 0.95rem;
  font-family: var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.tag {
  background: rgba(255, 255, 255, 0.08);
  padding: 4px 8px;
  border-radius: 999px;
  font-size: 0.7rem;
  color: var(--muted);
}

.layer-notes {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.layer-card {
  border-radius: 12px;
  border: 1px solid var(--border);
  padding: 12px;
  background: var(--bg-panel);
}

.layer-card h4 {
  margin: 0 0 6px;
  font-size: 0.9rem;
  color: var(--accent);
}

.layer-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.layer-card .source {
  display: block;
  margin-top: 8px;
  font-size: 0.75rem;
  color: var(--muted);
  font-family: var(--mono);
}

.chat-window {
  background: rgba(0, 0, 0, 0.3);
  padding: 12px;
  border-radius: 12px;
  min-height: 120px;
}

.chat-input {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}

.chat-input input {
  flex: 1;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 10px;
  border-radius: 10px;
}

.queue {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-size: 0.85rem;
}

.placeholder {
  color: var(--muted);
}

.muted {
  color: var(--muted);
}

@media (max-width: 1100px) {
  .workspace {
    grid-template-columns: 1fr;
  }

  .reader-body {
    grid-template-columns: 1fr;
  }

  .chapter-nav {
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding-bottom: 12px;
    margin-bottom: 12px;
  }
}