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

:root {
  --bg: #f5f5f5;
  --card-bg: #fff;
  --text: #222;
  --muted: #777;
  --border: #ddd;
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --success: #16a34a;
  --warning: #d97706;
  --danger: #dc2626;
  --info: #0284c7;
  --radius: 8px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1rem;
}

/* Navbar */
.navbar {
  background: var(--text);
  color: #fff;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.nav-brand { font-weight: 700; font-size: 1.1rem; }
.nav-links { display: flex; gap: 1rem; flex-wrap: wrap; }
.nav-links a { color: #ccc; text-decoration: none; font-size: 0.9rem; }
.nav-links a:hover, .nav-links a.active { color: #fff; }
.btn-link { background: none; border: none; cursor: pointer; }

/* Cards */
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}
.card h3 { margin-bottom: 0.75rem; }

/* Auth */
.auth-card {
  max-width: 400px;
  margin: 4rem auto;
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  text-align: center;
}
.auth-card h1 { margin-bottom: 0.5rem; }
.auth-card p { color: var(--muted); margin-bottom: 1.5rem; }
.auth-card form { text-align: left; }

/* Forms */
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; font-weight: 600; margin-bottom: 0.25rem; font-size: 0.9rem; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.95rem;
}
.form-row { display: flex; gap: 1rem; flex-wrap: wrap; }
.form-row .form-group { flex: 1; min-width: 180px; }

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.5rem 1rem;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.9rem;
  text-decoration: none;
  text-align: center;
  transition: opacity 0.15s;
}
.btn:hover { opacity: 0.85; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-success { background: var(--success); color: #fff; }
.btn-warning { background: var(--warning); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-block { display: block; width: 100%; }
.btn-sm { padding: 0.3rem 0.6rem; font-size: 0.8rem; }
.btn-lg { padding: 0.75rem 1.5rem; font-size: 1rem; }

/* Tables */
.table-responsive { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
th, td { padding: 0.5rem 0.75rem; text-align: left; border-bottom: 1px solid var(--border); }
th { font-weight: 600; background: #fafafa; }
.disabled-row { opacity: 0.5; }
.small-text { font-size: 0.8rem; max-width: 200px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.error-cell { font-size: 0.8rem; color: var(--danger); max-width: 250px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* Alerts */
.alert {
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  margin-bottom: 1rem;
  font-size: 0.9rem;
}
.alert-error { background: #fef2f2; color: var(--danger); border: 1px solid #fecaca; }
.alert-success { background: #f0fdf4; color: var(--success); border: 1px solid #bbf7d0; }
.alert-info { background: #eff6ff; color: var(--info); border: 1px solid #bfdbfe; }

/* Badges */
.badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}
.badge-success, .badge-valid { background: #dcfce7; color: var(--success); }
.badge-failed, .badge-expired, .badge-manual_required { background: #fef2f2; color: var(--danger); }
.badge-pending, .badge-monitoring, .badge-expires_soon { background: #fef9c3; color: var(--warning); }
.badge-waitlisted { background: #eff6ff; color: var(--info); }
.badge-needs_review, .badge-no_session { background: #f3f4f6; color: var(--muted); }

.status-badge {
  display: inline-block;
  padding: 0.35rem 1rem;
  border-radius: 20px;
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}
.badge-valid { background: #dcfce7; color: var(--success); }
.badge-expires_soon { background: #fef9c3; color: var(--warning); }
.badge-expired { background: #fef2f2; color: var(--danger); }
.badge-manual_required { background: #fef2f2; color: var(--danger); }
.badge-no_session { background: #f3f4f6; color: var(--muted); }

.session-card { border-left: 4px solid var(--muted); }
.session-card.status-valid { border-left-color: var(--success); }
.session-card.status-expires_soon { border-left-color: var(--warning); }
.session-card.status-expired { border-left-color: var(--danger); }
.session-card.status-manual_required { border-left-color: var(--danger); }

.muted { color: var(--muted); font-size: 0.85rem; }

/* Info box */
.info-box {
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 1rem;
}
.info-box ol { padding-left: 1.5rem; }
.info-box li { margin-bottom: 0.35rem; }

/* Mobile */
@media (max-width: 640px) {
  .navbar { flex-direction: column; align-items: flex-start; }
  .nav-links { width: 100%; justify-content: flex-start; }
  .form-row { flex-direction: column; }
  .form-row .form-group { min-width: 100%; }
  .btn-lg { width: 100%; }
}