:root {
  --bg: #0a0c10;
  --bg2: #12151c;
  --card: #1a1f2e;
  --text: #eef1f6;
  --muted: #8b93a7;
  --accent: #4f8cff;
  --accent2: #34d399;
  --warn: #fbbf24;
  --danger: #f87171;
  --border: #2a3145;
  --radius: 14px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

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

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 28px;
  border-bottom: 1px solid var(--border);
  background: rgba(10, 12, 16, 0.9);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 100;
}

.brand {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.nav-user {
  color: var(--muted);
  font-size: 0.9rem;
  margin-right: 4px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.9rem;
  border: none;
  cursor: pointer;
  transition: 0.2s;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover { filter: brightness(1.1); }

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

.btn-ghost:hover { background: var(--card); }

.hero {
  max-width: 1100px;
  margin: 0 auto;
  padding: 70px 28px 50px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.15;
  margin-bottom: 18px;
}

.hero p.lead {
  color: var(--muted);
  font-size: 1.1rem;
  margin-bottom: 28px;
}

.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }

.hero-card {
  background: linear-gradient(145deg, var(--card), #222a3d);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.35);
}

.hero-card .stat-row {
  display: flex;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

.hero-card .stat-row:last-child { border-bottom: none; }

.features {
  max-width: 1100px;
  margin: 0 auto;
  padding: 20px 28px 70px;
}

.features h2 {
  text-align: center;
  margin-bottom: 32px;
  font-size: 1.8rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.feature-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.feature-card .icon { font-size: 1.8rem; margin-bottom: 10px; }
.feature-card h3 { margin-bottom: 8px; font-size: 1.05rem; }
.feature-card p { color: var(--muted); font-size: 0.92rem; }

.auth-page {
  max-width: 460px;
  margin: 50px auto;
  padding: 0 20px 60px;
}

.auth-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
}

.auth-card h1 {
  margin-bottom: 8px;
  font-size: 1.5rem;
}

.auth-card .sub {
  color: var(--muted);
  margin-bottom: 24px;
  font-size: 0.92rem;
}

.form-group { margin-bottom: 16px; }

.form-group label {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 6px;
}

.form-group input {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg2);
  color: var(--text);
  font-size: 0.95rem;
}

.form-error {
  background: rgba(248,113,113,0.12);
  border: 1px solid var(--danger);
  color: var(--danger);
  padding: 10px 14px;
  border-radius: 8px;
  margin-bottom: 16px;
  font-size: 0.9rem;
}

.auth-footer {
  text-align: center;
  margin-top: 18px;
  color: var(--muted);
  font-size: 0.9rem;
}

.flash {
  max-width: 900px;
  margin: 12px auto;
  padding: 12px 18px;
  border-radius: 8px;
  text-align: center;
}

.flash-success { background: rgba(52,211,153,0.15); border: 1px solid var(--accent2); }
.flash-error { background: rgba(248,113,113,0.15); border: 1px solid var(--danger); }

.site-footer {
  text-align: center;
  padding: 30px;
  color: var(--muted);
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
}

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
}