:root {
  --bg: #0f0f1a;
  --bg-card: #1a1a2e;
  --bg-input: #12121f;
  --border: #2a2a45;
  --accent: #4f8ef7;
  --accent-hover: #3a7ae0;
  --text: #e8e8f0;
  --text-muted: #8888aa;
  --allow: #22c55e;
  --challenge: #f59e0b;
  --block: #ef4444;
  --font: system-ui, -apple-system, sans-serif;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-size: 15px;
  line-height: 1.6;
}

/* NAV */
.nav {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 0 1.5rem;
  height: 56px;
  display: flex;
  align-items: center;
}
.nav-inner {
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}
.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.15s;
}
.nav-links a:hover { color: var(--text); }

/* MAIN */
.main {
  flex: 1;
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* FOOTER */
.footer {
  border-top: 1px solid var(--border);
  text-align: center;
  padding: 1rem;
  color: var(--text-muted);
  font-size: 0.8rem;
}

/* HERO */
.hero { padding: 4rem 0 3rem; text-align: center; }
.hero-inner { max-width: 680px; margin: 0 auto; }
.hero-badge {
  display: inline-block;
  background: rgba(79,142,247,0.15);
  color: var(--accent);
  border: 1px solid rgba(79,142,247,0.3);
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  margin-bottom: 1.25rem;
}
.hero-title {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.04em;
  margin-bottom: 1rem;
}
.hero-sub { color: var(--text-muted); font-size: 1.1rem; margin-bottom: 2rem; }
.hero-actions { display: flex; gap: 0.75rem; justify-content: center; flex-wrap: wrap; }

/* FEATURES */
.features { padding: 2rem 0 4rem; }
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.5rem;
}
.feature-icon { font-size: 1.75rem; margin-bottom: 0.75rem; }
.feature-card h3 { font-size: 1rem; margin-bottom: 0.4rem; }
.feature-card p { color: var(--text-muted); font-size: 0.875rem; }

/* BUTTONS */
.btn-primary {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 0.55rem 1.25rem;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: background 0.15s;
}
.btn-primary:hover { background: var(--accent-hover); }
.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  padding: 0.55rem 1.25rem;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: border-color 0.15s;
}
.btn-outline:hover { border-color: var(--text-muted); }
.btn-lg { padding: 0.75rem 1.75rem; font-size: 1rem; }
.btn-sm { padding: 0.3rem 0.75rem; font-size: 0.8rem; }
.btn-block { width: 100%; text-align: center; }
.btn-link {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.9rem;
  cursor: pointer;
  padding: 0;
  transition: color 0.15s;
}
.btn-link:hover { color: var(--text); }

/* AUTH */
.auth-wrap {
  display: flex;
  justify-content: center;
  padding: 3rem 0;
}
.auth-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  width: 100%;
  max-width: 420px;
}
.auth-card h2 { font-size: 1.5rem; margin-bottom: 0.25rem; }
.auth-sub { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 1.5rem; }
.auth-form { display: flex; flex-direction: column; gap: 1rem; }
.auth-footer { margin-top: 1.25rem; text-align: center; font-size: 0.875rem; color: var(--text-muted); }
.auth-footer a { color: var(--accent); text-decoration: none; }

/* FIELDS */
.field { display: flex; flex-direction: column; gap: 0.35rem; }
.field label { font-size: 0.85rem; font-weight: 600; color: var(--text-muted); }
.field input, .field select {
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.6rem 0.8rem;
  border-radius: 6px;
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.15s;
  width: 100%;
}
.field input:focus { border-color: var(--accent); }
.field input::placeholder { color: var(--text-muted); }

/* ALERTS */
.alert {
  padding: 0.75rem 1rem;
  border-radius: 6px;
  font-size: 0.875rem;
  margin-bottom: 1rem;
}
.alert-error { background: rgba(239,68,68,0.15); border: 1px solid rgba(239,68,68,0.3); color: #fca5a5; }

/* PAGE HEADER */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.75rem;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.page-header h1 { font-size: 1.75rem; font-weight: 700; }
.page-header p { color: var(--text-muted); font-size: 0.9rem; margin-top: 0.2rem; }

/* STATS */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem;
  text-align: center;
}
.stat-value { font-size: 2.25rem; font-weight: 800; letter-spacing: -0.04em; }
.stat-label { color: var(--text-muted); font-size: 0.8rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; margin-top: 0.25rem; }
.stat-allow .stat-value { color: var(--allow); }
.stat-challenge .stat-value { color: var(--challenge); }
.stat-block .stat-value { color: var(--block); }

/* SECTION HEADER */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.section-header h2 { font-size: 1.2rem; font-weight: 700; }

/* TABLE */
.table-wrap { overflow-x: auto; }
.table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  font-size: 0.875rem;
}
.table th {
  text-align: left;
  padding: 0.75rem 1rem;
  background: rgba(255,255,255,0.03);
  color: var(--text-muted);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--border);
}
.table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--text);
}
.table tr:last-child td { border-bottom: none; }
.table tr:hover td { background: rgba(255,255,255,0.02); }

/* BADGES */
.badge {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.badge-allow { background: rgba(34,197,94,0.15); color: var(--allow); border: 1px solid rgba(34,197,94,0.3); }
.badge-challenge { background: rgba(245,158,11,0.15); color: var(--challenge); border: 1px solid rgba(245,158,11,0.3); }
.badge-block { background: rgba(239,68,68,0.15); color: var(--block); border: 1px solid rgba(239,68,68,0.3); }

/* CARD */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.5rem;
}
.card h2 { font-size: 1.1rem; margin-bottom: 0.5rem; }
.card h3 { font-size: 0.95rem; margin-bottom: 0.5rem; }

/* KEY BOX */
.key-box {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.6rem 1rem;
}
.key-box code {
  flex: 1;
  font-family: monospace;
  font-size: 0.875rem;
  color: var(--accent);
  word-break: break-all;
}

/* CODE BLOCK */
.code-block {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1rem;
}
.code-block pre {
  font-family: monospace;
  font-size: 0.85rem;
  color: #a8d8ff;
  white-space: pre-wrap;
  word-break: break-all;
}

/* MISC */
.mono { font-family: monospace; font-size: 0.8rem; }
.link { color: var(--accent); text-decoration: none; font-size: 0.875rem; }
.link:hover { text-decoration: underline; }
.empty-state {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 2.5rem;
  text-align: center;
  color: var(--text-muted);
}
.empty-state a { color: var(--accent); text-decoration: none; }
code { font-family: monospace; background: rgba(255,255,255,0.07); padding: 0.1em 0.4em; border-radius: 3px; font-size: 0.875em; }
a { color: var(--accent); text-decoration: none; }

/* Admin stats grid — 6 columns on desktop */
.admin-stats-grid {
  grid-template-columns: repeat(6, 1fr);
}

/* Fix button colours in nav */
.nav-links .btn-primary { color: #fff; }
.nav-links .btn-primary:hover { color: #fff; }
.nav-links .btn-outline {
  color: var(--text);
  padding: 0.4rem 0.9rem;
  font-size: 0.88rem;
}
.nav-links .btn-outline:hover { color: #fff; }

/* MOBILE RESPONSIVE */
@media (max-width: 600px) {
  .nav {
    padding: 0 1rem;
    height: auto;
    min-height: 56px;
  }
  .nav-inner {
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 0.6rem 0;
  }
  .nav-brand {
    font-size: 1rem;
  }
  .nav-links {
    gap: 0.75rem;
  }
  .nav-links a {
    font-size: 0.82rem;
  }
  .nav-links .btn-primary {
    padding: 0.4rem 0.85rem;
    font-size: 0.82rem;
  }
  .main {
    padding: 1.25rem 1rem;
  }
  .hero {
    padding: 2rem 0 1.5rem;
  }
  .hero-title {
    font-size: 2rem;
    letter-spacing: -0.02em;
  }
  .hero-sub {
    font-size: 0.95rem;
  }
  .auth-card {
    padding: 1.5rem 1rem;
  }
  .page-header h1 {
    font-size: 1.4rem;
  }
  .stat-value {
    font-size: 1.75rem;
  }
  .table th, .table td {
    padding: 0.6rem 0.75rem;
    font-size: 0.8rem;
  }
  .admin-stats-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .table-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
}