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

:root {
  --blue-600: #2563eb;
  --blue-700: #1d4ed8;
  --blue-50:  #eff6ff;
  --gray-50:  #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --white:    #ffffff;
  --shadow-sm:  0 1px 2px rgba(0,0,0,.05);
  --shadow-md:  0 4px 6px -1px rgba(0,0,0,.1), 0 2px 4px -2px rgba(0,0,0,.1);
  --shadow-lg:  0 10px 15px -3px rgba(0,0,0,.1), 0 4px 6px -4px rgba(0,0,0,.1);
  --shadow-xl:  0 20px 25px -5px rgba(0,0,0,.1), 0 8px 10px -6px rgba(0,0,0,.1);
  --radius:     12px;
  --radius-lg:  16px;
}

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--gray-800);
  line-height: 1.6;
  background: var(--white);
}

/* ── Typography ───────────────────────────────────── */
h1, h2, h3, h4 { line-height: 1.25; color: var(--gray-900); }
h1 { font-size: 2.75rem; font-weight: 800; letter-spacing: -0.025em; }
h2 { font-size: 2rem; font-weight: 700; }
h3 { font-size: 1.25rem; font-weight: 600; }
p  { color: var(--gray-600); }

a { color: var(--blue-600); text-decoration: none; }
a:hover { text-decoration: underline; }

code {
  font-family: "SF Mono", "Fira Code", "Fira Mono", Menlo, Consolas, monospace;
  font-size: 0.9em;
  background: var(--gray-100);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--gray-800);
}

/* ── Layout ───────────────────────────────────────── */
.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 80px 0;
}

/* ── Shared Header ────────────────────────────────── */
.site-header {
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
  padding: 12px 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .container {
  display: flex;
  align-items: center;
  gap: 16px;
}

.site-header-logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--gray-900);
  font-weight: 700;
  font-size: 1.1rem;
  white-space: nowrap;
}
.site-header-logo:hover { text-decoration: none; }

.site-header-logo img {
  width: 32px;
  height: 32px;
}

.site-header-logo .logo-text { display: inline; }
.site-header-logo .logo-text span { color: var(--blue-600); }

.site-header nav {
  display: flex;
  gap: 24px;
  margin-left: auto;
}

.site-header nav a {
  color: var(--gray-600);
  font-size: .9rem;
  font-weight: 500;
}
.site-header nav a:hover { color: var(--blue-600); text-decoration: none; }

/* ── Hero ─────────────────────────────────────────── */
.hero {
  background: linear-gradient(135deg, #eff6ff 0%, #e0e7ff 50%, #f0f0ff 100%);
  padding: 80px 0 60px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -10%;
  width: 120%;
  height: 200%;
  background: radial-gradient(ellipse at 30% 50%, rgba(59,130,246,.06) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 50%, rgba(99,102,241,.06) 0%, transparent 60%);
  pointer-events: none;
}

.hero .container { position: relative; z-index: 1; }

.hero-logo {
  width: 220px;
  height: auto;
  margin-bottom: 24px;
  filter: drop-shadow(0 4px 12px rgba(0,0,0,.12));
}

.hero h1 { margin-bottom: 8px; }
.hero h1 span { color: var(--blue-600); }

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--gray-500);
  margin-bottom: 12px;
  font-weight: 500;
}

.hero-tagline {
  font-size: 1.25rem;
  color: var(--gray-700);
  max-width: 640px;
  margin: 0 auto 36px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Buttons ──────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  transition: all .2s;
  border: none;
  cursor: pointer;
  text-decoration: none;
}

.btn-primary {
  background: var(--blue-600);
  color: var(--white);
  box-shadow: 0 4px 14px rgba(37,99,235,.35);
}
.btn-primary:hover {
  background: var(--blue-700);
  box-shadow: 0 6px 20px rgba(37,99,235,.4);
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--white);
  color: var(--gray-700);
  border: 1.5px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
}
.btn-secondary:hover {
  background: var(--gray-50);
  border-color: var(--gray-400);
  text-decoration: none;
  transform: translateY(-1px);
}

/* ── Features ─────────────────────────────────────── */
.features { background: var(--white); }
.features h2 { text-align: center; margin-bottom: 48px; }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
}

.feature-card {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 28px;
  transition: box-shadow .2s, transform .2s;
}
.feature-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.feature-icon { font-size: 2rem; margin-bottom: 12px; display: block; }
.feature-card h3 { margin-bottom: 8px; }
.feature-card p  { font-size: .95rem; }

/* ── Screenshots ──────────────────────────────────── */
.screenshots { background: var(--gray-50); }
.screenshots h2 { text-align: center; margin-bottom: 12px; }
.screenshots > .container > p { text-align: center; margin-bottom: 48px; font-size: 1.05rem; }

.screenshot-block {
  margin-bottom: 56px;
  text-align: center;
}
.screenshot-block:last-child { margin-bottom: 0; }

.screenshot-block h3 {
  font-size: 1.15rem;
  margin-bottom: 8px;
  color: var(--gray-700);
  text-align: left;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.screenshot-block > p {
  font-size: .95rem;
  margin-bottom: 16px;
  text-align: left;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.screenshot-img {
  max-width: 720px;
  width: 100%;
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-lg);
}

/* ── How It Works ─────────────────────────────────── */
.how-it-works { background: var(--white); }
.how-it-works h2 { text-align: center; margin-bottom: 48px; }

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 32px;
  counter-reset: step;
}

.step { text-align: center; position: relative; }

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--blue-600);
  color: var(--white);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.step h3 { margin-bottom: 8px; }
.step p  { font-size: .93rem; max-width: 260px; margin: 0 auto; }

/* ── Themes ────────────────────────────────────────── */
.themes { background: var(--gray-50); }
.themes h2 { text-align: center; margin-bottom: 12px; }
.themes > .container > p { text-align: center; margin-bottom: 48px; font-size: 1.05rem; }

.theme-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
}

.theme-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 20px 16px;
  text-align: center;
  transition: box-shadow .2s, transform .2s;
}
.theme-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.theme-emoji { font-size: 2rem; margin-bottom: 8px; display: block; }
.theme-card h3 { font-size: 1rem; margin-bottom: 4px; }
.theme-card p  { font-size: .85rem; }

/* ── Docs Links ───────────────────────────────────── */
.docs { background: var(--white); }
.docs h2 { text-align: center; margin-bottom: 48px; }

.doc-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
  max-width: 780px;
  margin: 0 auto;
}

.doc-card {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 28px;
  transition: box-shadow .2s, transform .2s;
  text-decoration: none;
  color: inherit;
}
.doc-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  text-decoration: none;
}

.doc-icon { font-size: 2.25rem; flex-shrink: 0; }
.doc-card h3 { margin-bottom: 6px; }
.doc-card p  { font-size: .93rem; }

/* ── License ──────────────────────────────────────── */
.license { background: var(--gray-50); }
.license h2 { text-align: center; margin-bottom: 12px; }
.license > .container > .license-subtitle {
  text-align: center;
  margin-bottom: 40px;
  font-size: 1.05rem;
}

.license-badge {
  display: inline-block;
  background: linear-gradient(135deg, var(--blue-600), var(--blue-700));
  color: var(--white);
  font-weight: 600;
  font-size: .85rem;
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 24px;
}

.license-box {
  max-width: 780px;
  margin: 0 auto;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 36px;
}

.license-box h3 {
  margin-bottom: 16px;
  font-size: 1.1rem;
}

.license-box p {
  font-size: .9rem;
  margin-bottom: 12px;
  line-height: 1.7;
}
.license-box p:last-child { margin-bottom: 0; }

/* ── Footer ────────────────────────────────────────── */
footer {
  background: var(--gray-900);
  color: var(--gray-400);
  padding: 40px 0;
  text-align: center;
  font-size: .9rem;
}
footer p { color: var(--gray-400); }
footer a { color: var(--gray-200); }
footer a:hover { color: var(--white); }

/* ════════════════════════════════════════════════════ */
/* Manual / Documentation Pages                        */
/* ════════════════════════════════════════════════════ */

/* ── Page Hero (smaller for manual pages) ─────────── */
.page-hero {
  background: linear-gradient(135deg, #eff6ff 0%, #e0e7ff 50%, #f0f0ff 100%);
  padding: 48px 0 40px;
  text-align: center;
}

.page-hero h1 {
  font-size: 2.25rem;
  margin-bottom: 8px;
}

.page-hero .page-hero-desc {
  font-size: 1.1rem;
  color: var(--gray-600);
  max-width: 600px;
  margin: 0 auto;
}

/* ── Table of Contents ────────────────────────────── */
.toc {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 24px 32px;
  margin-bottom: 48px;
}

.toc h2 {
  font-size: 1.1rem;
  margin-bottom: 12px;
  color: var(--gray-700);
}

.toc ol {
  padding-left: 20px;
  columns: 2;
  column-gap: 40px;
}

.toc li {
  margin-bottom: 6px;
  font-size: .93rem;
  color: var(--gray-600);
}

.toc a {
  color: var(--blue-600);
}

/* ── Manual Prose ─────────────────────────────────── */
.manual {
  padding: 56px 0 80px;
}

.manual .container {
  max-width: 820px;
}

.manual h2 {
  font-size: 1.75rem;
  margin: 56px 0 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--gray-200);
}

.manual h2:first-of-type {
  margin-top: 0;
}

.manual h3 {
  font-size: 1.2rem;
  margin: 32px 0 12px;
  color: var(--gray-800);
}

.manual h4 {
  font-size: 1.05rem;
  margin: 24px 0 8px;
  color: var(--gray-700);
}

.manual p {
  margin-bottom: 16px;
  font-size: .97rem;
  line-height: 1.75;
}

.manual ul, .manual ol {
  margin: 0 0 16px 24px;
  color: var(--gray-600);
}

.manual li {
  margin-bottom: 6px;
  font-size: .95rem;
  line-height: 1.65;
}

.manual li strong {
  color: var(--gray-800);
}

.manual strong {
  color: var(--gray-800);
}

.manual hr {
  border: none;
  border-top: 1px solid var(--gray-200);
  margin: 48px 0;
}

/* ── Blockquotes (Tips / Notes) ───────────────────── */
.manual blockquote {
  border-left: 4px solid var(--blue-600);
  background: var(--blue-50);
  padding: 16px 20px;
  margin: 16px 0 20px;
  border-radius: 0 8px 8px 0;
}

.manual blockquote p {
  margin-bottom: 0;
  color: var(--gray-700);
  font-size: .93rem;
}

/* ── Code Blocks ──────────────────────────────────── */
.manual pre {
  background: var(--gray-900);
  color: #e5e7eb;
  padding: 20px 24px;
  border-radius: 10px;
  overflow-x: auto;
  margin: 16px 0 20px;
  font-size: .88rem;
  line-height: 1.6;
}

.manual pre code {
  background: transparent;
  padding: 0;
  border-radius: 0;
  color: inherit;
  font-size: inherit;
}

/* ── Tables ───────────────────────────────────────── */
.manual table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0 24px;
  font-size: .93rem;
}

.manual th {
  background: var(--gray-100);
  font-weight: 600;
  text-align: left;
  padding: 10px 14px;
  border: 1px solid var(--gray-200);
  color: var(--gray-700);
}

.manual td {
  padding: 10px 14px;
  border: 1px solid var(--gray-200);
  color: var(--gray-600);
}

.manual tr:hover td {
  background: var(--gray-50);
}

/* ── Section Emoji Icons ──────────────────────────── */
.manual .section-icon {
  font-size: 1.5rem;
  margin-right: 8px;
  vertical-align: middle;
}

/* ── Directory Tree ───────────────────────────────── */
.manual .tree {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: 10px;
  padding: 20px 24px;
  margin: 16px 0 20px;
  font-family: "SF Mono", "Fira Code", Menlo, Consolas, monospace;
  font-size: .88rem;
  line-height: 1.7;
  color: var(--gray-700);
  white-space: pre;
  overflow-x: auto;
}

/* ── Keyboard Shortcut Keys ───────────────────────── */
kbd {
  display: inline-block;
  padding: 2px 8px;
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: .85em;
  background: var(--gray-100);
  border: 1px solid var(--gray-200);
  border-radius: 4px;
  box-shadow: 0 1px 0 var(--gray-200);
  color: var(--gray-700);
}

/* ── Responsive ───────────────────────────────────── */
@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
  section { padding: 56px 0; }
  .hero { padding: 56px 0 40px; }
  .hero-logo { width: 160px; }
  .hero-tagline { font-size: 1.05rem; }
  .btn { padding: 12px 22px; font-size: .95rem; }
  .feature-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .theme-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
  .doc-cards { grid-template-columns: 1fr; }
  .toc ol { columns: 1; }
  .page-hero h1 { font-size: 1.75rem; }
  .site-header nav { gap: 16px; }
  .site-header nav a { font-size: .85rem; }
}

@media (max-width: 480px) {
  .steps { grid-template-columns: 1fr; }
  .hero-buttons { flex-direction: column; align-items: center; }
  .site-header .container { flex-wrap: wrap; }
}