/* ============================================================
   Narrator App — Design System
   Tokens from wiki/design.md
   ============================================================ */

/* ── Design tokens ─────────────────────────────────────────── */
:root {
  /* Colors */
  --color-primary:      #17171c;
  --color-brand-black:  #000000;
  --color-ink:          #212121;
  --color-deep-green:   #003c33;
  --color-dark-navy:    #071829;
  --color-canvas:       #ffffff;
  --color-soft-stone:   #eeece7;
  --color-pale-green:   #edfce9;
  --color-pale-blue:    #f1f5ff;
  --color-hairline:     #d9d9dd;
  --color-border-light: #e5e7eb;
  --color-card-border:  #f2f2f2;
  --color-muted:        #93939f;
  --color-slate:        #75758a;
  --color-body-muted:   #616161;
  --color-action-blue:  #1863dc;
  --color-focus-blue:   #4c6ee6;
  --color-coral:        #ff7759;
  --color-coral-soft:   #ffad9b;
  --color-form-focus:   #9b60aa;
  --color-on-dark:      #ffffff;
  --color-error:        #b30000;

  /* Typography */
  --font-display: 'Space Grotesk', Inter, ui-sans-serif, system-ui;
  --font-body:    Inter, Arial, ui-sans-serif, system-ui;
  --font-mono:    'JetBrains Mono', 'Fira Code', ui-monospace, monospace;

  /* Radius */
  --r-xs:   4px;
  --r-sm:   8px;
  --r-md:   16px;
  --r-lg:   22px;
  --r-xl:   30px;
  --r-pill: 32px;
  --r-full: 9999px;

  /* Spacing */
  --sp-xs:  6px;
  --sp-sm:  8px;
  --sp-md:  12px;
  --sp-lg:  16px;
  --sp-xl:  24px;
  --sp-xxl: 32px;
  --sp-section: 80px;

  /* Layout */
  --container-max: 1120px;
  --container-pad: clamp(1rem, 5vw, 3rem);
}


/* ── Reset ──────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  color: var(--color-ink);
  background: var(--color-canvas);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

/* ── Layout ─────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}


/* ── Navigation ─────────────────────────────────────────────── */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-hairline);
}

.nav-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--sp-xxl);
}

.nav-links a {
  font-size: 0.875rem;
  color: var(--color-ink);
  transition: color 0.15s;
}
.nav-links a:hover { color: var(--color-primary); }


/* ── Buttons ─────────────────────────────────────────────────── */
.btn-primary {
  display: inline-block;
  background: var(--color-primary);
  color: var(--color-on-dark);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.71;
  border-radius: var(--r-pill);
  padding: 12px 28px;
  border: none;
  cursor: pointer;
  transition: opacity 0.15s;
  white-space: nowrap;
}
.btn-primary:hover { opacity: 0.85; color: var(--color-on-dark); }

.btn-secondary {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: var(--color-ink);
  text-decoration: underline;
  text-underline-offset: 3px;
  cursor: pointer;
  transition: color 0.15s;
}
.btn-secondary:hover { color: var(--color-primary); }


/* ── Hero ────────────────────────────────────────────────────── */
.hero {
  padding: var(--sp-section) 0 calc(var(--sp-section) * 0.75);
  text-align: center;
}

.hero-headline {
  font-family: var(--font-display);
  font-size: clamp(2.75rem, 6vw, 4.5rem);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.04em;
  color: var(--color-primary);
  margin-bottom: 1.25rem;
}

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.125rem);
  color: var(--color-body-muted);
  max-width: 540px;
  margin: 0 auto 2rem;
  line-height: 1.6;
}

.hero-ctas {
  display: flex;
  gap: var(--sp-xl);
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}


/* ── App preview card ─────────────────────────────────────────── */
.app-preview-card {
  background: var(--color-primary);
  border-radius: var(--r-lg);
  max-width: 620px;
  margin: 0 auto;
  overflow: hidden;
  text-align: left;
}

.preview-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 16px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.preview-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,0.15);
  display: inline-block;
}

.preview-title {
  margin-left: auto;
  margin-right: auto;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: rgba(255,255,255,0.35);
  letter-spacing: 0.03em;
}

.preview-body {
  padding: 1.25rem 1.5rem 1.5rem;
}

.preview-line {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.8;
  color: var(--color-soft-stone);
  white-space: pre;
}
.preview-line.dim   { color: rgba(238,236,231,0.35); }
.preview-line.accent{ color: rgba(238,236,231,0.75); }
.preview-line.done  { color: #a3d9a5; }


/* ── Section typography ──────────────────────────────────────── */
.section-heading {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 400;
  letter-spacing: -0.03em;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.section-sub {
  font-size: 1rem;
  color: var(--color-muted);
  margin-bottom: 2.5rem;
}


/* ── Docs section ─────────────────────────────────────────────── */
.docs-section {
  padding: var(--sp-section) 0;
  border-top: 1px solid var(--color-hairline);
}

.doc-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-xl);
  margin-bottom: var(--sp-xxl);
}

/* Capability card */
.capability-card {
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--r-sm);
  padding: var(--sp-xxl);
  cursor: pointer;
  transition: border-color 0.15s, box-shadow 0.15s;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.capability-card:hover {
  border-color: var(--color-ink);
}
.capability-card.active {
  border-color: var(--color-primary);
  box-shadow: inset 0 0 0 1px var(--color-primary);
}

.card-icon {
  font-size: 1.25rem;
  margin-bottom: 0.25rem;
}

.card-title {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 400;
  letter-spacing: -0.02em;
  color: var(--color-primary);
}

.card-desc {
  font-size: 0.875rem;
  color: var(--color-body-muted);
  line-height: 1.5;
}

.card-cta {
  margin-top: auto;
  font-size: 0.8125rem;
  color: var(--color-action-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}


/* ── Doc reading panel ───────────────────────────────────────── */
.doc-panel {
  border: 1px solid var(--color-hairline);
  border-radius: var(--r-md);
  overflow: hidden;
  margin-top: var(--sp-sm);
  transition: opacity 0.2s;
}
.doc-panel.hidden { display: none; }

.doc-panel-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.875rem 1.5rem;
  border-bottom: 1px solid var(--color-hairline);
  background: var(--color-soft-stone);
}

.doc-panel-title {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-muted);
  letter-spacing: 0.03em;
}

.doc-panel-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-xl);
}

.doc-close {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-muted);
  font-size: 0.9rem;
  padding: 0;
  line-height: 1;
  transition: color 0.15s;
}
.doc-close:hover { color: var(--color-primary); }

.doc-content {
  padding: 2rem 2.5rem 2.5rem;
}

.doc-loading {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-muted);
}

/* Rendered markdown styles */
.doc-content h1,
.doc-content h2,
.doc-content h3,
.doc-content h4 {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: -0.02em;
  color: var(--color-primary);
  margin: 2rem 0 0.75rem;
}
.doc-content h1 { font-size: 1.75rem; margin-top: 0; }
.doc-content h2 { font-size: 1.375rem; padding-top: 1rem; border-top: 1px solid var(--color-hairline); }
.doc-content h3 { font-size: 1.125rem; }
.doc-content h4 { font-size: 1rem; }

.doc-content p   { margin-bottom: 1rem; line-height: 1.65; color: var(--color-ink); }
.doc-content ul,
.doc-content ol  { margin: 0 0 1rem 1.5rem; }
.doc-content li  { margin-bottom: 0.3rem; line-height: 1.6; color: var(--color-ink); }

.doc-content a {
  color: var(--color-action-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.doc-content strong { font-weight: 500; }

.doc-content code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--color-soft-stone);
  border-radius: var(--r-xs);
  padding: 0.15em 0.4em;
}

/* Terminal block — code fences */
.doc-content .terminal-block {
  background: var(--color-primary);
  color: var(--color-soft-stone);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.6;
  border-radius: var(--r-sm);
  padding: 1rem 1.25rem;
  margin: 1.25rem 0;
  overflow-x: auto;
}
.doc-content .terminal-block code {
  background: none;
  padding: 0;
  font-size: inherit;
  color: inherit;
}

.doc-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0;
  font-size: 0.875rem;
}
.doc-content th {
  text-align: left;
  font-weight: 500;
  font-size: 0.8125rem;
  color: var(--color-muted);
  border-bottom: 1px solid var(--color-hairline);
  padding: 0.5rem 0.75rem;
}
.doc-content td {
  border-bottom: 1px solid var(--color-card-border);
  padding: 0.6rem 0.75rem;
  vertical-align: top;
  line-height: 1.5;
}
.doc-content td code {
  font-size: 0.8125rem;
}

.doc-content blockquote {
  border-left: 3px solid var(--color-hairline);
  padding-left: 1rem;
  margin: 1rem 0;
  color: var(--color-body-muted);
}

.doc-content hr {
  border: none;
  border-top: 1px solid var(--color-hairline);
  margin: 2rem 0;
}


/* ── Voice samples section ────────────────────────────────────── */
.samples-section {
  padding: var(--sp-section) 0;
  border-top: 1px solid var(--color-hairline);
}

.sample-post-preview {
  border: 1px solid var(--color-hairline);
  border-radius: var(--r-md);
  overflow: hidden;
  margin-bottom: 32px;
  background: var(--color-canvas);
}

.sample-post-header {
  display: flex;
  align-items: center;
  padding: 0.875rem 1.5rem;
  border-bottom: 1px solid var(--color-hairline);
  background: var(--color-soft-stone);
}

.sample-post-label {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-muted);
  letter-spacing: 0.03em;
}

.sample-post-content {
  padding: 2rem 2.5rem;
  max-height: 280px;
  overflow-y: auto;
}

.sample-post-content h1,
.sample-post-content h2,
.sample-post-content h3,
.sample-post-content h4 {
  font-family: var(--font-display);
  font-weight: 500;
  color: var(--color-ink);
  margin-bottom: 0.75rem;
}

.sample-post-content p {
  margin-bottom: 1rem;
  line-height: 1.65;
  color: var(--color-ink);
}

.sample-post-content em { font-style: italic; }

.sample-post-content strong { font-weight: 500; }

.sample-post-content blockquote {
  border-left: 3px solid var(--color-hairline);
  margin: 0 0 1rem;
  padding: 4px 0 4px 1rem;
  color: var(--color-muted);
  font-style: italic;
}

.sample-post-content a {
  color: var(--color-action-blue);
  text-decoration: none;
}

.sample-post-content::-webkit-scrollbar { width: 4px; }
.sample-post-content::-webkit-scrollbar-track { background: transparent; }
.sample-post-content::-webkit-scrollbar-thumb {
  background: var(--color-hairline);
  border-radius: 2px;
}

.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-sm);
  margin-bottom: 2rem;
}

/* Voice filter chip */
.voice-filter-chip {
  display: inline-block;
  background: transparent;
  border: 1px solid var(--color-coral);
  color: var(--color-coral);
  font-family: var(--font-body);
  font-size: 0.875rem;
  border-radius: var(--r-sm);
  padding: 6px 14px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  user-select: none;
}
.voice-filter-chip:hover,
.voice-filter-chip.active {
  background: var(--color-coral);
  color: var(--color-primary);
}

/* Voice grid */
.voice-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-xl);
}

/* Audio player card */
.audio-player-card {
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--r-md);
  padding: var(--sp-xl);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: border-color 0.15s;
}
.audio-player-card:hover {
  border-color: var(--color-slate);
}
.audio-player-card.hidden { display: none; }

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-sm);
  flex-wrap: wrap;
}

/* Voice tag chip */
.voice-tag-chip {
  display: inline-block;
  background: var(--color-soft-stone);
  color: var(--color-ink);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.02em;
  border-radius: var(--r-full);
  padding: 4px 10px;
  white-space: nowrap;
}

.voice-accent {
  font-size: 0.8125rem;
  color: var(--color-muted);
  white-space: nowrap;
}


.audio-player-card audio {
  width: 100%;
  height: 36px;
  border-radius: var(--r-xs);
  accent-color: var(--color-primary);
}


/* ── Footer ──────────────────────────────────────────────────── */
.site-footer {
  background: var(--color-primary);
  padding: 2rem 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--sp-lg);
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-on-dark);
  letter-spacing: -0.02em;
}

.footer-license {
  font-size: 0.8125rem;
  color: var(--color-muted);
}

.footer-github {
  font-size: 0.8125rem;
  color: var(--color-muted);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.15s;
}
.footer-github:hover { color: var(--color-on-dark); }


/* ── Responsive ──────────────────────────────────────────────── */

/* Tablet — 768px */
@media (max-width: 1024px) {
  .voice-grid { grid-template-columns: repeat(2, 1fr); }
}

/* Large mobile — 768px */
@media (max-width: 768px) {
  .doc-grid   { grid-template-columns: 1fr; }
  .voice-grid { grid-template-columns: repeat(2, 1fr); }
  .doc-content { padding: 1.5rem; }
  .hero-headline { font-size: 2.5rem; }
}

/* Mobile — 640px */
@media (max-width: 640px) {
  .voice-grid { grid-template-columns: 1fr; }

  .nav-links a:not(#nav-github) { display: none; }

  .hero-ctas { flex-direction: column; align-items: center; }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }

  .doc-panel-bar {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--sp-sm);
  }
}

/* Small mobile — 425px */
@media (max-width: 425px) {
  .hero-headline { font-size: 2rem; }
  .preview-body  { padding: 1rem; }
  .preview-line  { font-size: 0.75rem; }
}

/* ── Focus styles ─────────────────────────────────────────────── */
:focus-visible {
  outline: 2px solid var(--color-focus-blue);
  outline-offset: 2px;
}