/* GitSmith Landing Page */

/* ─── Dark theme (default) ─── */
:root {
  --surface-0: #141420;
  --surface-1: #1a1a2e;
  --surface-2: #252540;
  --surface-3: #30304e;
  --surface-hover: #282845;
  --accent: #e8853a;
  --accent-hover: #d4742e;
  --accent-dim: rgba(232, 133, 58, 0.16);
  --border: #4e5170;
  --border-subtle: #3a3a5c;
  --text-primary: #f0f2ff;
  --text-secondary: #cdd4eb;
  --text-muted: #9298b5;
  --green: #b0eeab;
  --green-dim: rgba(176, 238, 171, 0.16);
  --yellow: #ffe6b0;
  --yellow-dim: rgba(255, 230, 176, 0.16);
  --red: #ff96b4;
  --red-dim: rgba(255, 150, 180, 0.16);
  --peach: #ffbe94;
  --mauve: #d4b0ff;
  --mauve-dim: rgba(212, 176, 255, 0.14);
  --header-bg: rgba(20, 20, 32, 0.85);
  --card-shadow: rgba(0, 0, 0, 0.3);
  --hero-shadow: rgba(0, 0, 0, 0.5);
  --accent-glow: rgba(232, 133, 58, 0.3);
}

/* ─── Light theme ─── */
:root[data-theme="light"] {
  --surface-0: #f7f8fc;
  --surface-1: #ebedf4;
  --surface-2: #dfe2ec;
  --surface-3: #ced2e0;
  --surface-hover: #d8dce8;
  --accent: #c4600a;
  --accent-hover: #a85008;
  --accent-dim: rgba(196, 96, 10, 0.1);
  --border: #a8adc0;
  --border-subtle: #c0c4d4;
  --text-primary: #1e2038;
  --text-secondary: #3e4158;
  --text-muted: #6c7090;
  --green: #2e8a1a;
  --green-dim: rgba(46, 138, 26, 0.1);
  --yellow: #b87308;
  --yellow-dim: rgba(184, 115, 8, 0.1);
  --red: #b80a30;
  --red-dim: rgba(184, 10, 48, 0.1);
  --peach: #d85000;
  --mauve: #7028d4;
  --mauve-dim: rgba(112, 40, 212, 0.1);
  --header-bg: rgba(247, 248, 252, 0.85);
  --card-shadow: rgba(0, 0, 0, 0.08);
  --hero-shadow: rgba(0, 0, 0, 0.15);
  --accent-glow: rgba(196, 96, 10, 0.2);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif;
  background: var(--surface-0);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background 0.3s, color 0.3s;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s;
}

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

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

/* ─── Header ─── */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--header-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  transition: background 0.3s;
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

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

.header-right {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

.nav a:hover {
  color: var(--text-primary);
}

/* Theme toggle button */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  background: var(--surface-2);
  color: var(--text-secondary);
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.theme-toggle:hover {
  border-color: var(--border);
  color: var(--text-primary);
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
  width: 18px;
  height: 18px;
}

/* Show/hide sun/moon based on theme */
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
:root[data-theme="light"] .theme-toggle .icon-sun { display: block; }
:root[data-theme="light"] .theme-toggle .icon-moon { display: none; }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

/* ─── Hero ─── */
.hero {
  padding: 140px 0 80px;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: var(--accent-dim);
  color: var(--accent);
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.hero h1 .gradient {
  background: linear-gradient(135deg, var(--accent), var(--peach));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 40px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 60px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-hover);
  color: #fff;
  box-shadow: 0 8px 30px var(--accent-glow);
}

.btn-secondary {
  background: var(--surface-2);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--surface-3);
  color: var(--text-primary);
}

.hero-screenshot {
  max-width: 960px;
  margin: 0 auto;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  box-shadow: 0 20px 60px var(--hero-shadow);
  position: relative;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.screenshot-img {
  display: none;
  width: 100%;
}

.screenshot-img.active {
  display: block;
}

/* ─── Features ─── */
.features {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 80px;
}

.section-header h2 {
  font-size: 2.4rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 500px;
  margin: 0 auto;
}

/* Showcase row */
.showcase {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 80px;
}

.showcase--reverse {
  direction: rtl;
}

.showcase--reverse > * {
  direction: ltr;
}

.showcase-text {
  padding: 8px 0;
}

.showcase-label {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 16px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 16px;
}

.showcase-label--accent { background: var(--accent-dim); color: var(--accent); }
.showcase-label--green { background: var(--green-dim); color: var(--green); }
.showcase-label--mauve { background: var(--mauve-dim); color: var(--mauve); }

.showcase-text h3 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 14px;
  line-height: 1.2;
}

.showcase-text p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.75;
}

.showcase-visual {
  background: var(--surface-1);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 24px;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.showcase-visual:hover {
  border-color: var(--border);
  box-shadow: 0 12px 40px var(--card-shadow);
}

.showcase-visual svg {
  width: 100%;
  height: auto;
}

/* "And much more" pill list */
.features-more {
  text-align: center;
  margin-top: 20px;
}

.features-more h3 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 24px;
  color: var(--text-secondary);
}

.features-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  background: var(--surface-1);
  border: 1px solid var(--border-subtle);
  border-radius: 24px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: border-color 0.2s, background 0.2s, color 0.2s;
}

.pill:hover {
  border-color: var(--accent);
  color: var(--text-primary);
  background: var(--accent-dim);
}

.pill svg {
  color: var(--accent);
}

/* ─── Download ─── */
.download {
  padding: 100px 0;
  text-align: center;
}

.download-cards {
  display: flex;
  gap: 24px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 48px;
}

.download-card {
  background: var(--surface-1);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 32px 40px;
  min-width: 220px;
  transition: border-color 0.3s, box-shadow 0.3s, background 0.3s;
}

.download-card:hover {
  border-color: var(--accent);
  box-shadow: 0 8px 30px var(--accent-glow);
}

.download-card .os-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
}

.download-card h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.download-card p {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 20px;
}

.download-card .btn {
  width: 100%;
  justify-content: center;
}

.download-note {
  margin-top: 32px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ─── Footer ─── */
.footer {
  padding: 40px 0;
  border-top: 1px solid var(--border-subtle);
}

.footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-left {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.85rem;
}

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

/* ─── Active nav link ─── */
.nav a.nav-active {
  color: var(--accent);
}

/* ─── Page Hero (subpages) ─── */
.page-hero {
  padding: 140px 0 60px;
  text-align: center;
}

.page-hero h1 {
  font-size: 2.8rem;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.page-hero-subtitle {
  color: var(--text-secondary);
  font-size: 1.15rem;
  max-width: 620px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ─── Page Sections ─── */
.page-section {
  padding: 40px 0;
}

.page-cta {
  padding: 80px 0;
}

/* ─── Content Card ─── */
.content-card {
  background: var(--surface-1);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 40px;
}

.content-card h2 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.content-card p {
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 16px;
}

.content-card--highlight {
  border-color: var(--accent);
  box-shadow: 0 0 40px var(--accent-glow);
}

/* ─── Requirements List ─── */
.req-list {
  list-style: none;
  padding: 0;
}

.req-list li {
  padding: 10px 0;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  line-height: 1.6;
}

.req-list li:last-child {
  border-bottom: none;
}

/* ─── OS Install Card ─── */
.os-install-card {
  background: var(--surface-1);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  overflow: hidden;
}

.os-install-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 28px 40px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border-subtle);
}

.os-install-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0;
}

.os-install-body {
  padding: 32px 40px;
}

.os-install-body h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 24px 0 12px;
  color: var(--text-primary);
}

.os-install-body h3:first-child {
  margin-top: 0;
}

/* ─── Install Steps ─── */
.install-steps {
  padding-left: 24px;
  color: var(--text-secondary);
  line-height: 1.9;
}

.install-steps li {
  margin-bottom: 4px;
}

.install-steps ul {
  padding-left: 20px;
  margin: 4px 0;
}

/* ─── Code Block ─── */
.code-block {
  background: var(--surface-0);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 16px 20px;
  margin: 12px 0;
  overflow-x: auto;
}

.code-block code {
  font-family: "Fira Code", "Cascadia Code", "JetBrains Mono", monospace;
  font-size: 0.9rem;
  color: var(--text-primary);
  white-space: pre;
  display: block;
  line-height: 1.7;
}

/* ─── Callout ─── */
.callout {
  border-radius: 10px;
  padding: 16px 20px;
  margin: 20px 0 0;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.callout--warning {
  background: var(--yellow-dim);
  border-left: 4px solid var(--yellow);
}

.callout--info {
  background: var(--accent-dim);
  border-left: 4px solid var(--accent);
}

/* ─── Feature Grid (features page) ─── */
.feature-category {
  margin-bottom: 64px;
}

.feature-category-header {
  margin-bottom: 28px;
}

.feature-category-header h2 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-top: 8px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.feature-item {
  background: var(--surface-1);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 24px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.feature-item:hover {
  border-color: var(--border);
  box-shadow: 0 4px 20px var(--card-shadow);
}

.feature-item h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-item p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.65;
}

.feature-item code {
  background: var(--surface-2);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.85rem;
}

/* ─── AI Feature Rows (ai-integration page) ─── */
.ai-feature-row {
  display: flex;
  gap: 32px;
  align-items: flex-start;
  padding: 40px 0;
  border-bottom: 1px solid var(--border-subtle);
}

.ai-feature-row:last-child {
  border-bottom: none;
}

.ai-feature-number {
  font-size: 3rem;
  font-weight: 800;
  color: var(--accent);
  opacity: 0.3;
  line-height: 1;
  min-width: 80px;
  text-align: center;
}

.ai-feature-content h3 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.ai-feature-content p {
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 16px;
}

.ai-feature-details {
  list-style: none;
  padding: 0;
}

.ai-feature-details li {
  position: relative;
  padding-left: 24px;
  color: var(--text-secondary);
  line-height: 1.8;
  font-size: 0.95rem;
}

.ai-feature-details li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.6;
}

.ai-feature-details code {
  background: var(--surface-2);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.85rem;
}

/* ─── Provider Grid ─── */
.provider-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.provider-card {
  background: var(--surface-2);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 24px;
  text-align: center;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.provider-card:hover {
  border-color: var(--border);
  box-shadow: 0 4px 20px var(--card-shadow);
}

.provider-icon {
  margin-bottom: 12px;
}

.provider-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 4px;
}

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

/* ─── MCP Columns ─── */
.mcp-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-top: 24px;
}

.mcp-column h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.mcp-column ul {
  list-style: none;
  padding: 0;
}

.mcp-column li {
  padding: 6px 0;
  padding-left: 20px;
  position: relative;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.mcp-column li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.5;
}

/* ─── Animations ─── */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

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

  .showcase--reverse {
    direction: ltr;
  }
}

@media (max-width: 640px) {
  .hero h1 {
    font-size: 2.2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .showcase-text h3 {
    font-size: 1.3rem;
  }

  .nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--surface-1);
    border-bottom: 1px solid var(--border-subtle);
    padding: 16px 24px;
    gap: 16px;
  }

  .nav.open {
    display: flex;
  }

  .hamburger {
    display: flex;
  }

  .download-cards {
    flex-direction: column;
    align-items: center;
  }

  .download-card {
    width: 100%;
    max-width: 320px;
  }

  .footer .container {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  .page-hero h1 {
    font-size: 2rem;
  }

  .content-card,
  .os-install-header,
  .os-install-body {
    padding: 24px;
  }

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

  .ai-feature-row {
    flex-direction: column;
    gap: 16px;
  }

  .ai-feature-number {
    min-width: auto;
    font-size: 2rem;
    text-align: left;
  }

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

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