/* Zixir GitHub Pages landing - purple, gold, orange theme */
:root {
  --zixir-purple-400: #818cf8;
  --zixir-purple-500: #6366f1;
  --zixir-purple-600: #4f46e5;
  --zixir-violet: #a855f7;
  --zixir-orange: #f97316;
  --zixir-orange-light: #fb923c;
  --zixir-gold: #facc15;
  --zixir-gold-light: #fde047;
  --zixir-bg: #0f172a;
  --zixir-bg-card: #1e293b;
  --zixir-bg-elevated: #334155;
  --zixir-border: #334155;
  --zixir-text: #e2e8f0;
  --zixir-text-muted: #94a3b8;
  --zixir-gradient: linear-gradient(135deg, #f97316, #a855f7, #facc15);
  --zixir-gradient-subtle: linear-gradient(135deg, rgba(249, 115, 22, 0.15), rgba(168, 85, 247, 0.15), rgba(250, 204, 21, 0.1));
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: var(--zixir-bg);
  color: var(--zixir-text);
  line-height: 1.6;
}

.landing-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 23, 42, 0.9);
  border-bottom: 1px solid var(--zixir-border);
  padding: 0.75rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  justify-content: space-between;
}

.landing-nav a {
  color: var(--zixir-text-muted);
  text-decoration: none;
  font-size: 0.9rem;
}

.landing-nav a:hover {
  color: var(--zixir-purple-400);
}

.landing-nav .nav-links {
  display: flex;
  gap: 1.5rem;
}

.landing-hero {
  text-align: center;
  padding: 4rem 1.5rem 3rem;
  background: var(--zixir-gradient-subtle);
  border-bottom: 1px solid var(--zixir-border);
}

.landing-hero img {
  width: 96px;
  height: 96px;
  margin-bottom: 1rem;
}

.landing-hero h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
  background: var(--zixir-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.landing-hero .tagline {
  font-size: 1.15rem;
  color: var(--zixir-text-muted);
  max-width: 560px;
  margin: 0 auto 0.75rem;
}

.landing-hero .landing-byline {
  font-size: 0.95rem;
  color: var(--zixir-text-muted);
  margin: 0 auto 2rem;
}

.landing-hero .landing-byline a {
  color: var(--zixir-purple-400);
  text-decoration: none;
}

.landing-hero .landing-byline a:hover {
  text-decoration: underline;
}

.landing-install {
  max-width: 640px;
  margin: 0 auto;
  background: var(--zixir-bg-card);
  border: 1px solid var(--zixir-border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.landing-install code {
  flex: 1;
  font-family: ui-monospace, monospace;
  font-size: 0.85rem;
  overflow-x: auto;
  color: var(--zixir-gold-light);
}

.landing-install .copy-btn {
  flex-shrink: 0;
  background: var(--zixir-purple-600);
  color: white;
  border: none;
  padding: 0.4rem 0.75rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.85rem;
}

.landing-install .copy-btn:hover {
  background: var(--zixir-purple-500);
}

.landing-install .copy-btn.copied {
  background: #059669;
}

.landing-os-tabs {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  margin-top: 0.75rem;
}

.landing-os-tabs button {
  background: transparent;
  color: var(--zixir-text-muted);
  border: 1px solid var(--zixir-border);
  padding: 0.35rem 0.75rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.85rem;
}

.landing-os-tabs button.active {
  color: var(--zixir-orange);
  border-color: var(--zixir-orange);
}

.landing-os-tabs button:hover:not(.active) {
  color: var(--zixir-text);
}

.landing-section {
  max-width: 900px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

.landing-section h2 {
  font-size: 1.75rem;
  margin: 0 0 1.5rem;
  color: var(--zixir-text);
}

.landing-section h3 {
  font-size: 1.2rem;
  margin: 1.5rem 0 0.75rem;
  color: var(--zixir-purple-400);
}

.landing-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}

.landing-card {
  background: var(--zixir-bg-card);
  border: 1px solid var(--zixir-border);
  border-radius: 8px;
  padding: 1.25rem;
}

.landing-card h4 {
  margin: 0 0 0.5rem;
  color: var(--zixir-gold);
  font-size: 1rem;
}

.landing-card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--zixir-text-muted);
}

.landing-code {
  background: var(--zixir-bg-card);
  border: 1px solid var(--zixir-border);
  border-radius: 8px;
  padding: 1rem;
  overflow-x: auto;
  font-family: ui-monospace, monospace;
  font-size: 0.9rem;
  color: var(--zixir-gold-light);
}

.landing-code + .landing-code {
  margin-top: 0.5rem;
}

.landing-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.landing-table th,
.landing-table td {
  padding: 0.6rem 0.75rem;
  text-align: left;
  border: 1px solid var(--zixir-border);
}

.landing-table th {
  background: var(--zixir-bg-card);
  color: var(--zixir-purple-400);
}

.landing-table tr:nth-child(even) {
  background: rgba(30, 41, 59, 0.5);
}

.landing-tiers {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin: 1.5rem 0;
}

@media (max-width: 640px) {
  .landing-tiers {
    grid-template-columns: 1fr;
  }
}

.landing-tier {
  background: var(--zixir-bg-card);
  border: 1px solid var(--zixir-border);
  border-radius: 8px;
  padding: 1.25rem;
  text-align: center;
}

.landing-tier strong {
  display: block;
  color: var(--zixir-orange);
  margin-bottom: 0.5rem;
}

.landing-tier span {
  font-size: 0.9rem;
  color: var(--zixir-text-muted);
}

.landing-footer {
  text-align: center;
  padding: 2rem 1.5rem;
  border-top: 1px solid var(--zixir-border);
  color: var(--zixir-text-muted);
  font-size: 0.9rem;
}

.landing-footer a {
  color: var(--zixir-purple-400);
  text-decoration: none;
}

.landing-footer a:hover {
  text-decoration: underline;
}

.landing-footer .author {
  margin-top: 0.5rem;
}

.faq-item {
  margin-bottom: 1rem;
}

.faq-item h4 {
  color: var(--zixir-text);
  margin: 0 0 0.35rem;
  font-size: 1rem;
}

.faq-item p {
  margin: 0;
  color: var(--zixir-text-muted);
  font-size: 0.9rem;
}

.landing-optional {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  background: rgba(168, 85, 247, 0.08);
  border-left: 3px solid var(--zixir-violet);
  border-radius: 0 6px 6px 0;
  font-size: 0.9rem;
  color: var(--zixir-text-muted);
}

.landing-optional a {
  color: var(--zixir-purple-400);
  text-decoration: none;
}

.landing-optional a:hover {
  text-decoration: underline;
}

.landing-section h2 {
  border-bottom: 2px solid var(--zixir-purple-600);
  padding-bottom: 0.35rem;
  display: inline-block;
}

.landing-feature-list {
  list-style: none;
  padding: 0;
  margin: 0 0 1rem;
}

.landing-feature-list li {
  padding: 0.35rem 0;
  padding-left: 1.25rem;
  position: relative;
  color: var(--zixir-text-muted);
  font-size: 0.95rem;
}

.landing-feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  background: var(--zixir-gold);
  border-radius: 50%;
}