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

:root {
  --bg: #fef9ef;
  --bg-alt: #fff7db;
  --surface: #ffffff;
  --border: #1a1a2e;
  --border-w: 3px;
  --shadow: 5px 5px 0 #1a1a2e;
  --shadow-hover: 7px 7px 0 #1a1a2e;
  --shadow-sm: 3px 3px 0 #1a1a2e;
  --text: #1a1a2e;
  --text-muted: #5c5c78;
  --petal-yellow: #fbbf24;
  --petal-gold: #f59e0b;
  --petal-cream: #fef3c7;
  --stem-green: #65a30d;
  --stem-light: #bef264;
  --leaf-green: #4d7c0f;
  --sky-blue: #7dd3fc;
  --blush-pink: #fda4af;
  --lavender: #c4b5fd;
  --accent: var(--petal-gold);
  --accent-bg: var(--petal-cream);
  --radius: 12px;
  --font-mono: "SF Mono", "Cascadia Code", "JetBrains Mono", "Fira Code", Consolas, monospace;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-display: "Fraunces", Georgia, "Times New Roman", serif;
}

[data-theme="dark"] {
  --bg: #1a1a2e;
  --bg-alt: #16213e;
  --surface: #222244;
  --border: #fbbf24;
  --shadow: 5px 5px 0 #fbbf24;
  --shadow-hover: 7px 7px 0 #fbbf24;
  --shadow-sm: 3px 3px 0 #fbbf24;
  --text: #fef9ef;
  --text-muted: #b8b8d0;
  --accent: var(--petal-yellow);
  --accent-bg: #2a2a4e;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background 0.3s ease, color 0.3s ease;
}

.container {
  max-width: 1060px;
  margin: 0 auto;
  padding: 0 24px;
}

a {
  color: var(--leaf-green);
  text-decoration: none;
  font-weight: 600;
}

[data-theme="dark"] a {
  color: var(--petal-yellow);
}

a:hover {
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--accent-bg);
  padding: 2px 8px;
  border-radius: 4px;
  border: 2px solid var(--border);
}

/* === Theme Toggle === */
.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 100;
  width: 48px;
  height: 48px;
  border: var(--border-w) solid var(--border);
  border-radius: 50%;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  font-size: 1.3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  line-height: 1;
}

.theme-toggle:hover {
  transform: translate(-1px, -1px);
  box-shadow: var(--shadow);
}

.theme-toggle:active {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 var(--border);
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
  pointer-events: none;
}

[data-theme="dark"] .theme-toggle .icon-sun { display: inline; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: inline; }

/* === Ko-fi float === */
.kofi-float {
  position: fixed;
  top: 20px;
  right: 80px;
  z-index: 100;
  transition: transform 0.15s ease;
}
.kofi-float:hover {
  transform: translateY(-2px);
}
.kofi-float img {
  height: 36px;
  display: block;
}

/* === Hero — split layout === */
.hero {
  padding: 72px 0 64px;
  background: var(--bg);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -40px;
  left: -40px;
  right: -40px;
  bottom: -40px;
  background:
    radial-gradient(circle at 10% 40%, var(--petal-cream) 0%, transparent 40%),
    radial-gradient(circle at 90% 70%, #fef3c7 0%, transparent 30%);
  z-index: 0;
}

[data-theme="dark"] .hero::before {
  background:
    radial-gradient(circle at 10% 40%, #fbbf2408 0%, transparent 40%),
    radial-gradient(circle at 90% 70%, #fbbf2405 0%, transparent 30%);
}

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

.hero-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}

.hero-left {
  text-align: left;
}

.hero-flower {
  font-size: 3rem;
  margin-bottom: 12px;
  display: block;
}

.hero-title {
  font-family: var(--font-display), Georgia, serif;
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: 12px;
  line-height: 1.1;
}

.hero-title-accent {
  color: var(--petal-gold);
}

[data-theme="dark"] .hero-title-accent {
  color: var(--petal-yellow);
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text);
  margin-bottom: 6px;
  font-weight: 600;
}

.hero-tagline {
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: 28px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 10px 24px;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 0.95rem;
  border: var(--border-w) solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  cursor: pointer;
}

.btn:hover {
  text-decoration: none;
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow);
}

.btn:active {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 var(--border);
}

.btn-primary {
  background: var(--petal-yellow);
  color: #1a1a2e;
}

.btn-secondary {
  background: var(--surface);
  color: var(--text);
}

[data-theme="dark"] .btn-secondary {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border);
}

[data-theme="dark"] .btn-primary {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border);
}

.hero-install {
  display: inline-block;
  background: var(--surface);
  border: var(--border-w) solid var(--border);
  border-radius: var(--radius);
  padding: 8px 20px;
  box-shadow: var(--shadow-sm);
}

.hero-install code {
  background: none;
  padding: 0;
  border: none;
  font-size: 0.9rem;
  color: var(--stem-green);
  font-weight: 600;
}

[data-theme="dark"] .hero-install code {
  color: #86efac;
}

.hero-right .code-block {
  max-width: none;
}

/* === Sections === */
.section {
  padding: 72px 0;
}

.section-alt {
  background: var(--bg-alt);
}

.section h2 {
  font-family: var(--font-display), Georgia, serif;
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 12px;
  text-align: center;
  letter-spacing: -0.02em;
}

.section-intro {
  text-align: center;
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 40px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

/* === Code Blocks === */
.code-block {
  background: #1e1e2e;
  border: var(--border-w) solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  max-width: 700px;
  box-shadow: var(--shadow);
}

.code-block-center {
  margin: 0 auto;
}

.code-header {
  background: #14141f;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: var(--border-w) solid var(--border);
}

.code-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid #1a1a2e;
}

.code-dot.red { background: #f87171; }
.code-dot.yellow { background: #fbbf24; }
.code-dot.green { background: #4ade80; }

.code-filename {
  margin-left: 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: #8b8bac;
  font-weight: 600;
}

.code-block pre {
  padding: 16px 20px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.65;
  color: #e6e6fa;
}

.code-block code {
  background: none;
  padding: 0;
  font-size: inherit;
  border: none;
}

/* Syntax — always dark */
.kw { color: #ff7b72; }
.str { color: #a5d6ff; }
.type { color: #d2a8ff; }
.fn { color: #d2a8ff; }
.ivar { color: #ffa657; }
.num { color: #79c0ff; }
.sym { color: #7ee787; }
.comment { color: #6e6e8a; font-style: italic; }

/* === Architecture Steps === */
.arch-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.arch-step {
  text-align: center;
  background: var(--surface);
  border: var(--border-w) solid var(--border);
  border-radius: var(--radius);
  padding: 20px 14px;
  box-shadow: var(--shadow-sm);
}

.arch-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: var(--border-w) solid var(--border);
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 1rem;
  margin-bottom: 10px;
}

.arch-step:nth-child(1) .arch-num { background: var(--petal-cream); color: var(--petal-gold); }
.arch-step:nth-child(2) .arch-num { background: #ecfccb; color: var(--stem-green); }
.arch-step:nth-child(3) .arch-num { background: #dbeafe; color: #2563eb; }
.arch-step:nth-child(4) .arch-num { background: #f5d0fe; color: #a855f7; }

[data-theme="dark"] .arch-step:nth-child(1) .arch-num { background: #422006; }
[data-theme="dark"] .arch-step:nth-child(2) .arch-num { background: #1a2e05; }
[data-theme="dark"] .arch-step:nth-child(3) .arch-num { background: #172554; }
[data-theme="dark"] .arch-step:nth-child(4) .arch-num { background: #3b0764; }

.arch-step h3 {
  font-size: 0.95rem;
  margin-bottom: 6px;
  font-weight: 700;
}

.arch-step p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* === Batteries Included === */
.batteries-examples {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 36px;
}

.batteries-examples .code-block {
  max-width: none;
}

.batteries-examples .code-block pre {
  font-size: 0.78rem;
  line-height: 1.6;
  padding: 14px 16px;
}

/* Command tags grid */
.commands-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.cmd-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 6px 14px;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: 6px;
  box-shadow: 2px 2px 0 var(--border);
  color: var(--text);
  transition: transform 0.1s ease, box-shadow 0.1s ease;
}

a.cmd-tag {
  color: var(--text);
  text-decoration: none;
}

a.cmd-tag:hover {
  text-decoration: none;
  transform: translate(-1px, -1px);
  box-shadow: 3px 3px 0 var(--border);
  background: var(--petal-cream);
}

[data-theme="dark"] a.cmd-tag:hover {
  background: #2a2a4e;
}

/* === Gem Cards === */
.gem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.gem-card-full {
  grid-column: 1 / -1;
}

a.gem-card {
  display: block;
  color: inherit;
  font-weight: inherit;
  text-decoration: none;
}

a.gem-card:hover {
  text-decoration: none;
}

.gem-card {
  background: var(--surface);
  border: var(--border-w) solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
  box-shadow: var(--shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.gem-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-hover);
}

.gem-card h3 {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  margin-bottom: 4px;
}

.gem-card:nth-child(1) h3 { color: var(--petal-gold); }
.gem-card:nth-child(2) h3 { color: var(--stem-green); }
.gem-card:nth-child(3) h3 { color: #c026d3; }
.gem-card:nth-child(4) h3 { color: var(--sky-blue); }

[data-theme="dark"] .gem-card:nth-child(1) h3 { color: var(--petal-yellow); }
[data-theme="dark"] .gem-card:nth-child(2) h3 { color: #86efac; }
[data-theme="dark"] .gem-card:nth-child(3) h3 { color: #e879f9; }
[data-theme="dark"] .gem-card:nth-child(4) h3 { color: var(--sky-blue); }

.gem-role {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 2px 10px;
  border-radius: 4px;
  border: 2px solid var(--border);
  margin-bottom: 12px;
  color: var(--text);
}

.gem-card:nth-child(1) .gem-role { background: var(--petal-cream); }
.gem-card:nth-child(2) .gem-role { background: #ecfccb; }
.gem-card:nth-child(3) .gem-role { background: #f5d0fe; }
.gem-card:nth-child(4) .gem-role { background: #e0f2fe; }

[data-theme="dark"] .gem-card:nth-child(1) .gem-role { background: #422006; }
[data-theme="dark"] .gem-card:nth-child(2) .gem-role { background: #1a2e05; }
[data-theme="dark"] .gem-card:nth-child(3) .gem-role { background: #3b0764; }
[data-theme="dark"] .gem-card:nth-child(4) .gem-role { background: #0c4a6e; }

.gem-card > p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 14px;
}

.gem-highlights {
  list-style: none;
  margin-bottom: 14px;
}

.gem-highlights li {
  font-size: 0.82rem;
  color: var(--text);
  padding: 3px 0;
  font-weight: 500;
}

.gem-highlights li::before {
  content: "~ ";
  color: var(--petal-gold);
  font-family: var(--font-mono);
  font-weight: 700;
}

[data-theme="dark"] .gem-highlights li::before {
  color: var(--petal-yellow);
}

.gem-link {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* === Components === */
.component-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  max-width: 760px;
  margin: 0 auto;
}

.component {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 16px;
  background: var(--surface);
  border: var(--border-w) solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.component:hover {
  transform: translate(-1px, -1px);
  box-shadow: var(--shadow);
}

.component-name {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--stem-green);
  white-space: nowrap;
  min-width: 96px;
}

[data-theme="dark"] .component-name {
  color: #86efac;
}

.component-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.component-full {
  grid-column: 1 / -1;
}

/* === Footer === */
.footer {
  padding: 40px 0;
  border-top: var(--border-w) solid var(--border);
  text-align: center;
  background: var(--bg-alt);
}

.footer-links {
  display: flex;
  gap: 28px;
  justify-content: center;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.footer-links a {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 600;
}

.footer-links a:hover {
  color: var(--accent);
}

.footer-copy {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* === Responsive === */
@media (max-width: 900px) {
  .hero-split {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .hero-left {
    text-align: center;
  }

  .hero-actions {
    justify-content: center;
  }

  .batteries-examples {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.5rem;
  }

  .gem-grid {
    grid-template-columns: 1fr;
  }

  .arch-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .component-grid {
    grid-template-columns: 1fr;
  }

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

  .section {
    padding: 48px 0;
  }

  .section h2 {
    font-size: 1.8rem;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 56px 0 40px;
  }

  .hero-title {
    font-size: 2rem;
  }

  .arch-grid {
    grid-template-columns: 1fr;
  }

  .theme-toggle {
    top: 12px;
    right: 12px;
    width: 40px;
    height: 40px;
    font-size: 1.1rem;
  }

  .kofi-float {
    top: 12px;
    right: 56px;
  }
  .kofi-float img {
    height: 28px;
  }
}