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

:root {
  --bg: #0a0a0f;
  --surface: #12121a;
  --surface-2: #1a1a26;
  --border: #2a2a3a;
  --text: #e4e4ef;
  --text-muted: #8888a0;
  --accent: #6366f1;
  --accent-light: #818cf8;
  --accent-glow: rgba(99, 102, 241, 0.15);
  --green: #22c55e;
  --radius: 12px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 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;
}

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

a:hover {
  text-decoration: underline;
}

code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.875em;
  background: var(--surface-2);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--accent-light);
}

/* Hero */
.hero {
  text-align: center;
  padding: 100px 24px 80px;
  background: linear-gradient(180deg, rgba(99, 102, 241, 0.08) 0%, transparent 100%);
}

.hero-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-light);
  background: var(--accent-glow);
  border: 1px solid rgba(99, 102, 241, 0.3);
  padding: 4px 14px;
  border-radius: 999px;
  margin-bottom: 24px;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #fff 0%, var(--accent-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto 48px;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 64px;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-num {
  font-size: 2.5rem;
  font-weight: 700;
  color: #fff;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Services */
.services {
  padding: 80px 0;
}

.services h2,
.setup h2,
.security h2,
.troubleshooting h2 {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 48px;
  letter-spacing: -0.01em;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}

.service-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.service-card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 24px var(--accent-glow);
}

.service-icon {
  font-size: 1.8rem;
  margin-bottom: 12px;
}

.service-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.service-card p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Setup */
.setup {
  padding: 80px 0;
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.step {
  display: flex;
  gap: 24px;
  margin-bottom: 48px;
  align-items: flex-start;
}

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

.step-number {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  color: #fff;
  font-size: 1.2rem;
  font-weight: 700;
  border-radius: 50%;
}

.step-content {
  flex: 1;
  min-width: 0;
}

.step-content h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.step-content p {
  color: var(--text-muted);
  margin-bottom: 16px;
}

.code-block {
  position: relative;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 20px;
  margin-bottom: 16px;
  overflow-x: auto;
}

.code-block pre {
  margin: 0;
}

.code-block code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  background: none;
  padding: 0;
  color: var(--text);
  line-height: 1.7;
}

.copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.75rem;
  font-family: 'Inter', sans-serif;
  padding: 4px 12px;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.copy-btn:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.tip {
  background: rgba(99, 102, 241, 0.08);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: 8px;
  padding: 12px 16px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.tip strong {
  color: var(--accent-light);
}

.auth-steps {
  margin: 12px 0 16px 20px;
  color: var(--text-muted);
}

.auth-steps li {
  margin-bottom: 8px;
  font-size: 0.92rem;
}

.auth-steps a {
  font-weight: 500;
}

/* Security */
.security {
  padding: 80px 0;
}

.security-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.security-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.security-item h4 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--green);
}

.security-item p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Troubleshooting */
.troubleshooting {
  padding: 80px 0;
  background: var(--surface);
  border-top: 1px solid var(--border);
}

.faq {
  max-width: 700px;
  margin: 0 auto;
}

details {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 8px;
  overflow: hidden;
  transition: border-color 0.2s;
}

details[open] {
  border-color: var(--accent);
}

summary {
  padding: 16px 20px;
  font-weight: 500;
  cursor: pointer;
  user-select: none;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 12px;
}

summary::before {
  content: '+';
  font-size: 1.2rem;
  font-weight: 300;
  color: var(--text-muted);
  flex-shrink: 0;
  transition: transform 0.2s;
}

details[open] summary::before {
  content: '-';
}

summary::-webkit-details-marker {
  display: none;
}

details > p,
details > .code-block {
  padding: 0 20px 16px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

details > .code-block {
  margin: 0 20px 16px;
  padding: 12px 16px;
}

/* Footer */
footer {
  padding: 40px 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
}

/* Responsive */
@media (max-width: 640px) {
  .hero h1 {
    font-size: 2.2rem;
  }

  .hero-sub {
    font-size: 1rem;
  }

  .hero-stats {
    gap: 32px;
  }

  .stat-num {
    font-size: 2rem;
  }

  .step {
    flex-direction: column;
    gap: 16px;
  }

  .service-grid {
    grid-template-columns: 1fr;
  }

  .security-grid {
    grid-template-columns: 1fr;
  }
}