:root {
  --bg: #09090b;
  --bg-subtle: #18181b;
  --bg-card: #1c1c1f;
  --border: #27272a;
  --border-hover: #3f3f46;
  --text: #fafafa;
  --text-muted: #a1a1aa;
  --text-subtle: #71717a;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --gradient-start: #3b82f6;
  --gradient-end: #8b5cf6;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 0;
  background: rgba(9, 9, 11, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

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

.logo {
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.logo span {
  color: var(--accent);
}

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

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: color 0.15s;
}

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

.github-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: all 0.15s;
}

.github-btn:hover {
  background: var(--bg-card);
  border-color: var(--border-hover);
}

.github-btn svg {
  width: 18px;
  height: 18px;
}

/* Hero */
.hero {
  padding: 160px 0 80px;
  text-align: center;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: 100px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 24px;
  transition: all 0.15s;
}

.badge:hover {
  background: rgba(59, 130, 246, 0.2);
  border-color: rgba(59, 130, 246, 0.4);
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 20px;
}

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

.hero .subtitle {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 540px;
  margin: 0 auto 32px;
  line-height: 1.7;
}

/* Install Box */
.install-box {
  max-width: 800px;
  margin: 0 auto 16px;
  background: #0c0c0e;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.install-header {
  padding: 10px 16px;
  background: var(--bg-subtle);
  border-bottom: 1px solid var(--border);
}

.install-label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-muted);
}

.install-content {
  display: flex;
  align-items: center;
  padding: 16px;
  gap: 12px;
}

.install-content code {
  flex: 1;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: #4ade80;
  white-space: nowrap;
  overflow-x: auto;
}

.install-hint {
  text-align: center;
  color: var(--text-subtle);
  font-size: 0.8125rem;
  margin-bottom: 24px;
}

.copy-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s;
  flex-shrink: 0;
}

.copy-btn:hover {
  background: var(--bg);
  border-color: var(--border-hover);
  color: var(--text);
}

.copy-btn.small {
  padding: 4px 10px;
  font-size: 0.75rem;
}

.hero-buttons {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 10px;
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.15s;
  cursor: pointer;
}

.btn-primary {
  background: var(--accent);
  color: white;
  border: none;
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

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

.btn-secondary:hover {
  background: var(--bg-subtle);
  border-color: var(--border-hover);
}

/* Features */
.features {
  padding: 80px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-header h2 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.section-header p {
  color: var(--text-muted);
  font-size: 1.0625rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

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

.feature {
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  transition: all 0.2s;
}

.feature:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.feature-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(59, 130, 246, 0.1);
  border-radius: 12px;
  margin-bottom: 16px;
  font-size: 1.25rem;
}

.feature h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

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

/* Install */
.install {
  padding: 80px 0;
}

.os-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 24px;
}

.os-tab {
  padding: 10px 24px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-muted);
  font-size: 0.9375rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
}

.os-tab:hover {
  background: var(--bg-subtle);
  border-color: var(--border-hover);
  color: var(--text);
}

.os-tab.active {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

.os-content {
  max-width: 640px;
  margin: 0 auto;
}

.os-content.hidden {
  display: none;
}

.prereq-note {
  text-align: center;
  margin-top: 24px;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.prereq-note a {
  color: var(--accent);
  text-decoration: none;
}

.prereq-note a:hover {
  text-decoration: underline;
}

.platforms-grid {
  margin-top: 40px;
  text-align: center;
}

.platforms-grid h4 {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

.platform-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.platform-btn {
  padding: 12px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: all 0.15s;
}

.platform-btn:hover {
  border-color: var(--accent);
  background: var(--bg-subtle);
}

.loading-text {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.no-release {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.no-release a {
  color: var(--accent);
}

.os-note {
  margin-top: 12px;
  color: var(--text-muted);
  font-size: 0.8125rem;
}

.all-downloads {
  margin-top: 48px;
  text-align: center;
}

.downloads-label {
  font-size: 0.8125rem;
  color: var(--text-subtle);
  margin-bottom: 12px;
}

.download-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.download-link {
  padding: 8px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.8125rem;
  transition: all 0.15s;
}

.download-link:hover {
  border-color: var(--accent);
  color: var(--text);
}

.step-desc.alt {
  margin-top: 16px;
  font-size: 0.8125rem;
}

/* Notes/Warnings */
.note {
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 0.875rem;
}

.note.warning {
  background: rgba(234, 179, 8, 0.1);
  border: 1px solid rgba(234, 179, 8, 0.3);
  color: #fbbf24;
}

.note.info {
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.3);
  color: #60a5fa;
}

.note code {
  background: rgba(0,0,0,0.3);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.8125rem;
}

/* Setup tabs */
.setup-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 32px;
}

.setup-tab {
  padding: 10px 24px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-muted);
  font-size: 0.9375rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
}

.setup-tab:hover {
  background: var(--bg-subtle);
  border-color: var(--border-hover);
  color: var(--text);
}

.setup-tab.active {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

.setup-content {
  max-width: 720px;
  margin: 0 auto;
}

.setup-content.hidden {
  display: none;
}

.step-desc {
  color: var(--text-muted);
  font-size: 0.9375rem;
  margin-bottom: 12px;
}

.step-desc a {
  color: var(--accent);
}

.step-list {
  padding-left: 20px;
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 1.8;
}

.step-list a {
  color: var(--accent);
}

.step-list code {
  background: var(--bg-card);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.8125rem;
  color: var(--text);
}

.install-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 48px;
}

@media (max-width: 640px) {
  .install-card {
    padding: 32px 24px;
  }
}

.install-card h2 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
  text-align: center;
}

.install-card .detected {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-bottom: 32px;
}

.download-main {
  display: flex;
  justify-content: center;
  margin-bottom: 40px;
}

.download-main .btn {
  padding: 14px 32px;
  font-size: 1rem;
}

.platforms {
  border-top: 1px solid var(--border);
  padding-top: 32px;
}

.platforms h4 {
  text-align: center;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-subtle);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 20px;
}

.platform-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
}

.platform-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 16px;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text);
  text-decoration: none;
  transition: all 0.15s;
}

.platform-btn:hover {
  background: var(--bg);
  border-color: var(--accent);
}

.platform-btn .os {
  font-weight: 600;
  font-size: 0.9375rem;
}

.platform-btn .arch {
  color: var(--text-muted);
  font-size: 0.8125rem;
  margin-top: 2px;
}

/* Setup */
.setup {
  padding: 80px 0;
}

.steps {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.step {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 20px;
}

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

.step-number {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--accent);
}

.step-content h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.code-block {
  background: #0c0c0e;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.code-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: var(--bg-subtle);
  border-bottom: 1px solid var(--border);
}

.code-title {
  flex: 1;
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-left: 8px;
}

.code-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--border);
}

.code-content {
  padding: 20px;
  overflow-x: auto;
}

.code-content code {
  font-family: 'JetBrains Mono', 'SF Mono', Monaco, Consolas, monospace;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: #e4e4e7;
}

.code-content .comment {
  color: var(--text-subtle);
}

.code-content .string {
  color: #86efac;
}

.code-content .key {
  color: #93c5fd;
}

/* Config paths */
.config-paths {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.config-path {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.path-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  min-width: 70px;
}

.config-path code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* Example prompts */
.example-prompts {
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.prompt-intro {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.prompt {
  padding: 12px 16px;
  background: var(--bg-subtle);
  border-radius: 8px;
  font-size: 0.9375rem;
  color: var(--text);
  margin-bottom: 8px;
}

.prompt:last-child {
  margin-bottom: 0;
}

/* Help section */
.help-section {
  margin-top: 48px;
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  text-align: center;
}

.help-section p {
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.help-section a {
  color: var(--accent);
  text-decoration: none;
}

.help-section a:hover {
  text-decoration: underline;
}

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

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

@media (max-width: 640px) {
  footer .container {
    flex-direction: column;
    gap: 16px;
  }
}

footer p {
  color: var(--text-muted);
  font-size: 0.875rem;
}

footer a {
  color: var(--text);
  text-decoration: none;
}

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

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

.footer-links a {
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* Utilities */
.loading {
  opacity: 0.5;
  pointer-events: none;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}