/* ─── Design Tokens ─── */
:root {
  --bg-base: #1a1a1a;
  --bg-surface: #242424;
  --bg-card: #2d2d2d;
  --bg-card-hover: #363636;
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.15);
  --text-primary: #ffffff;
  --text-secondary: #8e8e93;
  --text-muted: #636366;
  --accent: #007aff;
  --accent-glow: rgba(0, 122, 255, 0.15);
  --accent-2: #28cd41;
  --accent-red: #ff3b30;
  --radius: 12px;
  --radius-lg: 20px;
  --font: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Inter', 'Segoe UI', Roboto, sans-serif;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ─── Reset ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  font-family: var(--font);
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: #0a84ff; }
img { max-width: 100%; display: block; }
code { font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace; }

/* ─── Container ─── */
.container { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* ─── NAV ─── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(26, 26, 26, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}
.nav-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.1rem;
}
.nav-logo { width: 28px; height: 28px; border-radius: 6px; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--text-primary); }
.nav-github { display: flex; align-items: center; }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 1px;
  transition: var(--transition);
}

/* ─── HERO ─── */
.hero {
  position: relative;
  padding: 140px 0 80px;
  overflow: hidden;
}
.hero-glow {
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(ellipse, rgba(0, 122, 255, 0.12) 0%, rgba(0, 122, 255, 0.04) 40%, transparent 70%);
  pointer-events: none;
}
.hero-content { text-align: center; position: relative; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 122, 255, 0.1);
  border: 1px solid rgba(0, 122, 255, 0.2);
  padding: 6px 16px;
  border-radius: 100px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 28px;
  letter-spacing: 0.01em;
}
.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-2);
  animation: pulse-dot 2s infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}
.gradient-text {
  background: linear-gradient(135deg, #007aff 0%, #5856d6 50%, #32ade6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

/* ─── Buttons ─── */
.hero-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font);
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 0 20px rgba(0, 122, 255, 0.3), 0 4px 12px rgba(0, 0, 0, 0.3);
}
.btn-primary:hover {
  background: #0a84ff;
  color: #fff;
  box-shadow: 0 0 30px rgba(0, 122, 255, 0.4), 0 8px 24px rgba(0, 0, 0, 0.3);
  transform: translateY(-1px);
}
.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-hover);
}
.btn-outline:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.2);
  color: var(--text-primary);
  transform: translateY(-1px);
}

/* ─── Hero Terminal (OpenClaw-style) ─── */
.hero-visual { margin-top: 56px; }
.hero-terminal {
  max-width: 720px;
  margin: 0 auto;
  background: #1e1e1e;
  text-align: left;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.03),
    0 25px 80px rgba(0, 0, 0, 0.6),
    0 0 100px rgba(0, 122, 255, 0.06);
}
.ht-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  height: 48px;
  background: rgba(255, 255, 255, 0.025);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.ht-bar-left {
  display: flex;
  align-items: center;
  gap: 8px;
}
.dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}
.dot.red { background: #ff3b30; }
.dot.yellow { background: #ffcc00; }
.dot.green { background: #28cd41; }
.ht-tabs {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: 12px;
}
.ht-tab {
  padding: 6px 14px;
  background: none;
  border: 1px solid transparent;
  border-radius: 6px;
  color: var(--text-muted);
  font-family: var(--font);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}
.ht-tab:hover {
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.04);
}
.ht-tab.active {
  color: var(--text-primary);
  background: rgba(0, 122, 255, 0.15);
  border-color: var(--accent);
}
.ht-bar-right {
  display: flex;
  align-items: center;
  gap: 10px;
}
.ht-platform {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 500;
}
.ht-badge {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 3px 10px;
  border-radius: 4px;
  letter-spacing: 0.02em;
}
/* Panels */
.ht-panel { display: none; padding: 28px 24px; }
.ht-panel.active { display: block; }
.ht-comment {
  font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  line-height: 1.6;
}
.ht-command {
  position: relative;
  font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  font-size: 0.95rem;
  color: var(--text-primary);
  line-height: 1.7;
  padding-right: 48px;
  word-break: break-all;
}
.ht-prompt {
  color: var(--accent-2);
  font-weight: 700;
  margin-right: 6px;
}
.ht-command .copy-btn {
  position: absolute;
  top: 0;
  right: 0;
}
.ht-footer {
  padding: 14px 24px;
  font-size: 0.82rem;
  color: var(--text-muted);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  text-align: center;
}
.t-border { color: var(--text-muted); }
.t-brand { color: var(--accent); font-weight: 600; }
.t-label { color: var(--text-secondary); }
.t-value { color: var(--text-primary); font-weight: 500; }
.t-path { color: #a78bfa; }
.t-green { color: var(--accent-2); }
.t-dim { color: var(--text-muted); }
.t-link { color: var(--accent); text-decoration: underline; text-decoration-style: dotted; text-underline-offset: 2px; }
.t-qr { color: var(--text-muted); font-size: 0.72rem; line-height: 1.1; }

/* ─── Sections ─── */
.section {
  padding: 100px 0;
  position: relative;
}
.section-alt {
  background: var(--bg-surface);
}
.section-label {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}
.section-desc {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 48px;
  max-width: 520px;
}

/* ─── Value Props ─── */
.values-section { border-top: 1px solid var(--border); }
.values-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 48px 64px;
}
.value-item h3 {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 10px;
  letter-spacing: -0.02em;
}
.value-item p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ─── App Preview ─── */
.preview-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.preview-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
}
.preview-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4), 0 0 60px rgba(0, 122, 255, 0.06);
}
.preview-label {
  padding: 14px 20px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border);
}
.preview-card img {
  width: 100%;
  height: auto;
  display: block;
}
.preview-grid .reveal:nth-child(1) { transition-delay: 0ms; }
.preview-grid .reveal:nth-child(2) { transition-delay: 120ms; }

/* ─── Steps ─── */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.step-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  text-align: center;
  transition: all var(--transition);
}
.step-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}
.step-number {
  position: absolute;
  top: 16px;
  right: 20px;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.04);
  width: 24px;
  height: 24px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.step-icon {
  color: var(--accent);
  margin-bottom: 18px;
}
.step-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}
.step-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ─── Features ─── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 26px;
  transition: all var(--transition);
}
.feature-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}
.feature-icon {
  color: var(--accent);
  margin-bottom: 16px;
  width: 48px;
  height: 48px;
  background: var(--accent-glow);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.feature-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}
.feature-card p {
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.6;
}

/* (Install block styles removed — replaced by hero-terminal) */
.copy-btn {
  position: absolute;
  top: 14px;
  right: 14px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-muted);
  padding: 6px;
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}
.copy-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.1);
}
.copy-btn.copied { color: var(--accent-2); }
.install-note {
  padding: 16px 24px;
  font-size: 0.82rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
}

/* ─── Download ─── */
.download-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}
.download-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 24px;
  transition: all var(--transition);
  color: var(--text-primary);
}
.download-card:hover {
  border-color: var(--accent);
  background: var(--bg-card-hover);
  color: var(--text-primary);
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(0, 122, 255, 0.1);
}
.download-icon {
  color: var(--accent);
  margin-bottom: 16px;
  opacity: 0.7;
}
.download-platform {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 6px;
}
.download-platform svg { opacity: 0.6; }
.download-file {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-family: 'SF Mono', 'Fira Code', monospace;
}
.download-arrow {
  position: absolute;
  top: 16px;
  right: 18px;
  font-size: 1rem;
  color: var(--text-muted);
  transition: all var(--transition);
}
.download-card:hover .download-arrow { color: var(--accent); transform: translate(2px, -2px); }
.download-note {
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* ─── CLI Table ─── */
.cli-table-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  overflow-x: auto;
  max-width: 700px;
}
.cli-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
.cli-table th {
  text-align: left;
  padding: 14px 20px;
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.02);
  border-bottom: 1px solid var(--border);
}
.cli-table td {
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
}
.cli-table tr:last-child td { border-bottom: none; }
.cli-table code {
  background: rgba(0, 122, 255, 0.1);
  color: var(--accent);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.82rem;
}

/* ─── Footer ─── */
.footer {
  padding: 48px 0 36px;
  border-top: 1px solid var(--border);
}
.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-primary);
}
.footer-logo { width: 22px; height: 22px; border-radius: 4px; }
.footer-links {
  display: flex;
  gap: 24px;
}
.footer-links a {
  color: var(--text-secondary);
  font-size: 0.88rem;
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--text-primary); }
.footer-copy {
  color: var(--text-muted);
  font-size: 0.82rem;
}
.footer-copy a { color: var(--text-secondary); }

/* ─── Animations ─── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1), transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger feature cards */
.features-grid .reveal:nth-child(1) { transition-delay: 0ms; }
.features-grid .reveal:nth-child(2) { transition-delay: 60ms; }
.features-grid .reveal:nth-child(3) { transition-delay: 120ms; }
.features-grid .reveal:nth-child(4) { transition-delay: 180ms; }
.features-grid .reveal:nth-child(5) { transition-delay: 240ms; }
.features-grid .reveal:nth-child(6) { transition-delay: 300ms; }

.steps-grid .reveal:nth-child(1) { transition-delay: 0ms; }
.steps-grid .reveal:nth-child(2) { transition-delay: 100ms; }
.steps-grid .reveal:nth-child(3) { transition-delay: 200ms; }

/* ─── Mobile ─── */
@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(26, 26, 26, 0.95);
    backdrop-filter: blur(20px);
    padding: 20px 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border);
  }
  .nav-links.open { display: flex; }

  .hero { padding: 120px 0 60px; }
  .hero-title { font-size: 2rem; }
  .hero-sub { font-size: 1rem; }
  .hero-actions { flex-direction: column; align-items: center; }
  .hero-actions .btn { width: 100%; max-width: 280px; justify-content: center; }

  .terminal-preview { font-size: 0.7rem; }
  .terminal-body { padding: 16px; }
  .terminal-body pre { font-size: 0.68rem; }

  .steps-grid { grid-template-columns: 1fr; gap: 16px; }
  .features-grid { grid-template-columns: 1fr; gap: 16px; }
  .download-grid { grid-template-columns: 1fr; gap: 16px; }
  .values-grid { grid-template-columns: 1fr; gap: 32px; }
  .preview-grid { grid-template-columns: 1fr; gap: 16px; }

  .section { padding: 64px 0; }
  .section-label { font-size: 1.3rem; }

  .install-tabs { flex-wrap: wrap; }
  .install-tab { padding: 10px 14px; font-size: 0.82rem; }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .steps-grid { grid-template-columns: repeat(3, 1fr); }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .download-grid { grid-template-columns: repeat(3, 1fr); }
}