/* =============================================
   Cowork Landing Page Styles
   Dark theme, developer tool aesthetic
   ============================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

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

:root {
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #21262d;
  --bg-card: #1c2128;
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #6e7681;
  --accent: #e8713a;
  --accent-hover: #f07e48;
  --accent-dim: rgba(232, 113, 58, 0.18);
  --border: #30363d;
  --border-light: #21262d;
  --success: #3fb950;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px rgba(232, 113, 58, 0.15);
}

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

body {
  font-family:
    'Inter',
    -apple-system,
    BlinkMacSystemFont,
    'Segoe UI',
    Roboto,
    Oxygen,
    Ubuntu,
    sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ---- Background grid ---- */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(88, 166, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(88, 166, 255, 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  z-index: 0;
}

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

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

/* ---- Layout ---- */
.container {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px 0 60px;
}

/* ---- Hero ---- */
.hero {
  text-align: center;
  width: 100%;
}

.logo-area {
  margin-bottom: 32px;
}

.logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 88px;
  height: 88px;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, #1c2128 0%, #21262d 100%);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-glow), var(--shadow-lg);
  margin-bottom: 20px;
  position: relative;
  overflow: hidden;
}

.logo-icon::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(135deg, rgba(232, 113, 58, 0.12) 0%, transparent 60%);
  pointer-events: none;
}

.logo-icon svg {
  width: 48px;
  height: 48px;
  position: relative;
  z-index: 1;
}

.app-name {
  font-size: 3.2rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--text-primary);
  line-height: 1.1;
  margin-bottom: 8px;
}

.version-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background: var(--accent-dim);
  border: 1px solid rgba(232, 113, 58, 0.3);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.02em;
  margin-bottom: 28px;
}

.version-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 6px var(--success);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.4;
  }
}

.tagline {
  font-size: 1.2rem;
  color: var(--text-secondary);
  font-weight: 400;
  max-width: 480px;
  margin: 0 auto 48px;
  line-height: 1.5;
}

/* ---- CTA Buttons ---- */
.cta-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  margin-bottom: 48px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  background: var(--accent);
  color: #0d1117;
  font-size: 1rem;
  font-weight: 700;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  box-shadow: 0 0 0 0 rgba(88, 166, 255, 0);
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.15) 0%, transparent 50%);
  pointer-events: none;
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(232, 113, 58, 0.45);
  color: #0d1117;
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-primary svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
}

.btn-secondary:hover {
  background: var(--bg-card);
  color: var(--text-primary);
  border-color: var(--text-muted);
}

.btn-secondary svg {
  width: 16px;
  height: 16px;
}

/* ---- Features ---- */
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  width: 100%;
  max-width: 640px;
  margin-bottom: 48px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 20px;
  text-align: center;
  transition:
    border-color 0.2s ease,
    box-shadow 0.2s ease;
}

.feature-card:hover {
  border-color: var(--border);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--accent-dim);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
}

.feature-icon svg {
  width: 20px;
  height: 20px;
  color: var(--accent);
}

.feature-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.feature-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* ---- GitHub Stars ---- */
.github-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  transition: all 0.2s ease;
}

.github-link:hover {
  border-color: var(--text-muted);
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

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

/* ---- Footer ---- */
footer {
  text-align: center;
  padding: 24px;
  border-top: 1px solid var(--border-light);
  color: var(--text-muted);
  font-size: 0.8rem;
  position: relative;
  z-index: 1;
}

footer a {
  color: var(--text-muted);
}

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

/* ---- Responsive ---- */
@media (max-width: 640px) {
  .app-name {
    font-size: 2.4rem;
  }

  .tagline {
    font-size: 1rem;
  }

  .features {
    grid-template-columns: 1fr;
    max-width: 320px;
  }

  main {
    padding: 60px 0 40px;
  }

  .container {
    padding: 0 20px;
  }
}

@media (max-width: 480px) {
  .app-name {
    font-size: 2rem;
  }

  .cta-group {
    width: 100%;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
    justify-content: center;
  }
}