/* Libyx — shared stylesheet
   Design tokens match the app's light-mode palette (index.html CSS vars).
   Fonts: Georgia italic for headings, system-ui for body. No external fonts.
*/

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

:root {
  --bg:           #F5EFE4;
  --surface:      #FAF6EC;
  --surface-2:    #FFFCF5;
  --accent:       #8A6D3B;
  --accent-hover: #6F562D;
  --accent-soft:  #EFE4CC;
  --text:         #1F1A14;
  --muted:        #6E6557;
  --hint:         #9E948A;
  --border:       #D9D0BE;
  --radius:       4px;
  --radius-lg:    8px;
  --font-serif:   Georgia, 'Times New Roman', serif;
  --font-sans:    system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --max-w:        1100px;
  --content-w:    640px;
}

/* ── Base ───────────────────────────────────────────────────────────── */
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); text-decoration: underline; }
code {
  font-family: ui-monospace, 'SF Mono', Menlo, monospace;
  font-size: 0.875em;
  background: var(--accent-soft);
  padding: 0.1em 0.35em;
  border-radius: var(--radius);
}

/* ── Header ─────────────────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 0 1.5rem;
}

.site-header .inner {
  max-width: var(--max-w);
  margin: 0 auto;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.wordmark {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.35rem;
  font-weight: 400;
  color: var(--text);
  text-decoration: none;
  border-bottom: 2px solid var(--accent);
  padding-bottom: 1px;
  letter-spacing: -0.01em;
}
.wordmark:hover { color: var(--text); text-decoration: none; }

.site-nav {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.site-nav a {
  font-size: 0.875rem;
  color: var(--muted);
}
.site-nav a:hover { color: var(--accent); text-decoration: none; }

/* ── Sections ────────────────────────────────────────────────────────── */
section { padding: 5rem 1.5rem; }
section .inner {
  max-width: var(--max-w);
  margin: 0 auto;
}

/* ── Hero ────────────────────────────────────────────────────────────── */
#hero {
  text-align: center;
  padding-top: 6rem;
  padding-bottom: 5rem;
}

#hero h1 {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.2;
  color: var(--text);
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
}

.hero-sub {
  max-width: 520px;
  margin: 0 auto 2.25rem;
  color: var(--muted);
  font-size: 1.0625rem;
}

.btn-group {
  display: flex;
  gap: 0.875rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.4rem;
  border-radius: var(--radius);
  font-size: 0.9375rem;
  font-family: var(--font-sans);
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border: 1px solid var(--accent);
}
.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #fff;
  text-decoration: none;
}

.btn-secondary {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}
.btn-secondary:hover {
  background: var(--accent-soft);
  color: var(--accent-hover);
  text-decoration: none;
}

.version-line {
  font-size: 0.8125rem;
  color: var(--hint);
}

/* ── Screenshot ──────────────────────────────────────────────────────── */
#screenshot {
  padding-top: 0;
  text-align: center;
}

.screenshot-frame {
  display: inline-block;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 4px 32px rgba(61, 46, 31, 0.10);
  max-width: 800px;
  width: 100%;
}

.screenshot-frame img,
.screenshot-frame object {
  width: 100%;
  height: auto;
  display: block;
}

.screenshot-caption {
  margin-top: 1rem;
  font-size: 0.875rem;
  color: var(--muted);
  font-style: italic;
}

/* ── How it works ────────────────────────────────────────────────────── */
#how-it-works { background: var(--surface); }

#how-it-works h2 {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(1.5rem, 3vw, 2rem);
  text-align: center;
  margin-bottom: 3rem;
  letter-spacing: -0.01em;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.step { display: flex; flex-direction: column; gap: 0.875rem; }

.step-number {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.125rem;
  color: var(--accent);
  font-weight: 400;
  flex-shrink: 0;
}

.step h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

.step p {
  font-size: 0.9375rem;
  color: var(--muted);
  line-height: 1.6;
}

/* ── API key section ─────────────────────────────────────────────────── */
#byok {
  text-align: center;
}

#byok h2 {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}

#byok p {
  max-width: 520px;
  margin: 0 auto 1.75rem;
  color: var(--muted);
  font-size: 1rem;
}

.providers {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  font-size: 0.875rem;
  color: var(--hint);
}

.providers span { display: flex; align-items: center; gap: 0.25rem; }
.providers .sep { color: var(--border); }

/* ── Windows section ─────────────────────────────────────────────────── */
#byok { padding-bottom: 2rem; }

#platform-notes {
  padding-top: 2rem;
  padding-bottom: 3rem;
}

.note-card {
  max-width: var(--content-w);
  margin: 0 auto 1.25rem;
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface);
}

.note-card.windows {
  border-left: 4px solid var(--accent);
}

.note-card.macos {
  border-left: 4px solid #5a8a5a;
  background: #f4faf4;
}

.note-card h3 {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 0.625rem;
  color: var(--text);
}

.note-card p, .note-card li {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.6;
}

.note-card ol {
  margin: 0.625rem 0 0 1.25rem;
}

.note-card li + li { margin-top: 0.25rem; }

.note-card.macos h3 { color: #3a6a3a; }
.note-card.macos p  { color: #4a7a4a; }

/* ── Footer ──────────────────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem;
}

.site-footer .inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  font-size: 0.8125rem;
  color: var(--hint);
}

.site-footer a {
  color: var(--muted);
  font-size: 0.8125rem;
}
.site-footer a:hover { color: var(--accent); text-decoration: none; }

.footer-links { display: flex; gap: 1.25rem; }
.footer-support { display: inline-flex; align-items: center; gap: 0.3rem; }
.footer-support svg { color: #DC2626; flex-shrink: 0; }

/* ── Content pages (privacy, terms) ─────────────────────────────────── */
.content-page { padding: 3rem 1.5rem 5rem; }

.content-page .breadcrumb {
  max-width: var(--content-w);
  margin: 0 auto 2.5rem;
  font-size: 0.875rem;
  color: var(--muted);
}

.content-page .breadcrumb a { color: var(--muted); }
.content-page .breadcrumb a:hover { color: var(--accent); }

.content-page article {
  max-width: var(--content-w);
  margin: 0 auto;
}

.content-page h1 {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: 0.375rem;
  letter-spacing: -0.01em;
}

.content-page .effective-date {
  font-size: 0.875rem;
  color: var(--hint);
  margin-bottom: 2.5rem;
}

.content-page h2 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin: 2rem 0 0.625rem;
  color: var(--text);
}

.content-page h3 {
  font-size: 0.9375rem;
  font-weight: 600;
  margin: 1.5rem 0 0.5rem;
  color: var(--text);
}

.content-page p { margin-bottom: 0.875rem; color: var(--muted); font-size: 0.9375rem; }
.content-page p:last-child { margin-bottom: 0; }
.content-page strong { color: var(--text); }

.content-page ul, .content-page ol {
  margin: 0.5rem 0 0.875rem 1.5rem;
  color: var(--muted);
  font-size: 0.9375rem;
}
.content-page li + li { margin-top: 0.3rem; }

.content-page table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  margin: 0.875rem 0;
}
.content-page th, .content-page td {
  text-align: left;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  color: var(--muted);
}
.content-page th {
  background: var(--accent-soft);
  color: var(--text);
  font-weight: 600;
}

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

/* ── Responsive ──────────────────────────────────────────────────────── */
@media (max-width: 640px) {
  .steps { grid-template-columns: 1fr; gap: 1.75rem; }
  .site-nav { gap: 1rem; }
  .btn-group { flex-direction: column; align-items: center; }
  .site-footer .inner { flex-direction: column; text-align: center; }
  .footer-links { justify-content: center; }
}

@media (max-width: 400px) {
  .site-nav { gap: 0.75rem; }
  .site-nav a { font-size: 0.8125rem; }
}