/* ============================================================
   Browser Relay Landing Page
   ============================================================ */

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

:root {
  --bg: #09090b;
  --bg-raised: #111113;
  --bg-card: #161618;
  --bg-card-hover: #1c1c1f;
  --border: #27272a;
  --border-light: #303033;
  --text: #f0f0f2;
  --text-muted: #9c9ca4;
  --text-dim: #63636e;
  --accent: #e8760a;
  --accent-light: #f59e0b;
  --accent-glow: rgba(245, 158, 11, 0.12);
  --accent-gradient: linear-gradient(135deg, #e8760a 0%, #f59e0b 50%, #fbbf24 100%);
  --green: #22c55e;
  --yellow: #eab308;
  --red: #ef4444;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: 'JetBrains Mono', 'Fira Code', monospace;
  --max-w: 1200px;
  --transition: 0.2s ease;
}

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

a { color: inherit; text-decoration: none; }
code {
  font-family: var(--mono);
  font-size: 0.85em;
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.2);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--accent-light);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font);
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  border-radius: var(--radius-sm);
  padding: 10px 24px;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}
.btn-primary {
  background: var(--accent-gradient);
  color: #fff;
  box-shadow: 0 4px 16px rgba(245, 158, 11, 0.25);
}
.btn-primary:hover {
  box-shadow: 0 6px 24px rgba(245, 158, 11, 0.35);
  transform: translateY(-1px);
}
.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-light);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent-light);
  background: var(--accent-glow);
}
.btn-lg { padding: 14px 32px; font-size: 1.05rem; border-radius: var(--radius); }
.btn-sm { padding: 8px 16px; font-size: 0.85rem; }
.btn-block { width: 100%; }

/* --- Nav --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 0;
  transition: all 0.3s ease;
}
.nav.scrolled {
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
}
.logo-icon {
  width: 28px;
  height: 28px;
  color: var(--accent-light);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-links a {
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--text); }
.nav-link-github {
  display: flex;
  align-items: center;
  opacity: 0.6;
  transition: opacity var(--transition);
}
.nav-link-github:hover { opacity: 1; }
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  cursor: pointer;
}

/* --- Hero --- */
.hero {
  padding: 160px 0 80px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.06) 0%, transparent 70%);
  pointer-events: none;
}
.hero-badge {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent-light);
  background: var(--accent-glow);
  border: 1px solid rgba(245, 158, 11, 0.2);
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 32px;
  letter-spacing: 0.02em;
}
.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}
.gradient-text {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto 40px;
  line-height: 1.7;
}
.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* --- Terminal --- */
.hero-terminal {
  max-width: 640px;
  margin: 56px auto 0;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-raised);
  overflow: hidden;
  text-align: left;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}
.terminal-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
}
.terminal-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}
.terminal-dot.red { background: var(--red); }
.terminal-dot.yellow { background: var(--yellow); }
.terminal-dot.green { background: var(--green); }
.terminal-title {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-left: auto;
  font-family: var(--mono);
}
.terminal-body { padding: 20px; }
.terminal-line {
  font-family: var(--mono);
  font-size: 0.88rem;
  line-height: 1.8;
  display: flex;
  gap: 8px;
}
.terminal-prompt { color: var(--green); font-weight: 500; }
.terminal-cmd { color: var(--text); }
.terminal-output { padding-left: 20px; }
.terminal-muted { color: var(--text-dim); }
.terminal-highlight { color: var(--accent-light); }
.terminal-success { color: var(--green); }
.terminal-cursor {
  display: inline-block;
  width: 8px;
  height: 18px;
  background: var(--accent);
  animation: blink 1.2s step-end infinite;
  margin-left: 2px;
  vertical-align: middle;
}
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

/* --- Social Proof --- */
.social-proof {
  padding: 40px 0 60px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}
.social-proof-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  margin-bottom: 24px;
}
.logo-strip {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 24px 40px;
}
.agent-logo {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
  opacity: 0.5;
  transition: opacity var(--transition);
}
.agent-logo:hover { opacity: 1; }

/* --- Sections --- */
.section {
  padding: 100px 0;
}
.section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  text-align: center;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}
.section-sub {
  text-align: center;
  color: var(--text-muted);
  font-size: 1.1rem;
  max-width: 560px;
  margin: 0 auto 60px;
}

/* --- How It Works --- */
.how-it-works { background: var(--bg-raised); }
.steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 16px;
}
.step {
  flex: 1;
  max-width: 300px;
  text-align: center;
  padding: 32px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  position: relative;
  transition: all var(--transition);
}
.step:hover {
  border-color: var(--accent);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(245, 158, 11, 0.1);
}
.step-number {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  width: 28px;
  height: 28px;
  background: var(--accent-gradient);
  color: #fff;
  font-weight: 700;
  font-size: 0.8rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.step-icon {
  width: 48px;
  height: 48px;
  margin: 8px auto 16px;
  color: var(--accent-light);
}
.step h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.step p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
}
.step-arrow {
  flex: 0 0 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-dim);
  margin-top: 80px;
}
.step-arrow svg { width: 24px; height: 24px; }

/* --- Features --- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: all var(--transition);
}
.feature-card:hover {
  border-color: var(--accent);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(245, 158, 11, 0.1);
}
.feature-icon {
  width: 40px;
  height: 40px;
  margin-bottom: 16px;
  color: var(--accent-light);
}
.feature-icon svg { width: 100%; height: 100%; }
.feature-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.feature-card p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* --- Tools --- */
.tools { background: var(--bg-raised); }
.tool-categories {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}
.tool-cat {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
}
.tool-cat h4 {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--accent-light);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.tool-cat h4 svg { flex-shrink: 0; }
.tool-cat ul { list-style: none; }
.tool-cat li {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  padding: 4px 0;
  border-bottom: 1px solid rgba(34, 34, 51, 0.5);
}
.tool-cat li:last-child { border-bottom: none; }
.tool-cat li code {
  background: none;
  border: none;
  padding: 0;
  color: var(--text-muted);
  font-size: inherit;
}

/* --- Code Example --- */
.code-example { border-top: 1px solid var(--border); }
.code-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.code-text h2 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}
.code-text p {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 24px;
  line-height: 1.7;
}
.check-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.check-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  color: var(--text);
}
.check-list svg { color: var(--green); flex-shrink: 0; }
.code-block-wrapper {
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-raised);
  overflow: hidden;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}
.code-block {
  padding: 24px;
  font-family: var(--mono);
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--text);
  overflow-x: auto;
}

/* --- Pricing --- */
.pricing { border-top: 1px solid var(--border); }
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  align-items: start;
}
.price-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  position: relative;
  transition: all var(--transition);
}
.price-card:hover {
  border-color: var(--border-light);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}
.price-card.featured {
  border-color: var(--accent);
  background: linear-gradient(180deg, rgba(245, 158, 11, 0.05) 0%, var(--bg-card) 100%);
  box-shadow: 0 8px 40px rgba(245, 158, 11, 0.12);
}
.price-card.featured:hover {
  box-shadow: 0 12px 48px rgba(245, 158, 11, 0.2);
}
.price-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-gradient);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 100px;
  white-space: nowrap;
}
.price-tier {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 8px;
}
.price-amount {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
}
.price-amount span {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-dim);
}
.price-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  line-height: 1.5;
}
.price-features {
  list-style: none;
  margin-bottom: 28px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.price-features li {
  font-size: 0.88rem;
  color: var(--text-muted);
  padding-left: 22px;
  position: relative;
}
.price-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--green);
  font-weight: 600;
  font-size: 0.85rem;
}

/* --- CTA --- */
.cta {
  text-align: center;
  background: var(--bg-raised);
  border-top: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
.cta::before {
  content: '';
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.05) 0%, transparent 70%);
  pointer-events: none;
}
.cta h2 {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 800;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}
.cta p {
  color: var(--text-muted);
  font-size: 1.1rem;
  margin-bottom: 32px;
}

/* --- Footer --- */
.footer {
  padding: 60px 0 0;
  border-top: 1px solid var(--border);
}
.footer-inner {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 60px;
  padding-bottom: 40px;
}
.footer-brand .logo { margin-bottom: 8px; }
.footer-tagline {
  font-size: 0.85rem;
  color: var(--text-dim);
}
.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}
.footer-links h5 {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.footer-links a {
  display: block;
  font-size: 0.88rem;
  color: var(--text-dim);
  padding: 4px 0;
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--text); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
}
.footer-bottom p {
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1024px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .tool-categories { grid-template-columns: repeat(3, 1fr); }
  .pricing-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border);
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }

  .hero { padding: 120px 0 60px; }
  .hero-title { font-size: 2.2rem; }
  .hero-sub { font-size: 1rem; }

  .steps { flex-direction: column; align-items: center; }
  .step-arrow { transform: rotate(90deg); margin: 0; }
  .step { max-width: 100%; }

  .feature-grid { grid-template-columns: 1fr; }
  .tool-categories { grid-template-columns: 1fr; }
  .code-split { grid-template-columns: 1fr; gap: 32px; }
  .pricing-grid { grid-template-columns: 1fr; }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .footer-links { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .hero-title { font-size: 1.8rem; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  .footer-links { grid-template-columns: 1fr; gap: 24px; }
}