/* ─── Base ─────────────────────────────────────────────────── */
:root {
  --bg: #0f172a;
  --bg-card: #1e293b;
  --bg-hover: #334155;
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --warning: #f59e0b;
  --success: #22c55e;
  --border: #334155;
  --radius: 8px;
}

* { 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);
  min-height: 100vh;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ─── Login Page ──────────────────────────────────────────── */
.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-container { width: 100%; max-width: 400px; padding: 20px; }

.login-card {
  background: var(--bg-card);
  border-radius: 12px;
  padding: 40px 32px;
  border: 1px solid var(--border);
}

.login-header { text-align: center; margin-bottom: 32px; }
.login-header .logo { font-size: 48px; margin-bottom: 12px; }
.login-header h1 { font-size: 24px; font-weight: 700; }
.login-header .subtitle { color: var(--text-muted); margin-top: 4px; font-size: 14px; }

/* ─── Forms ───────────────────────────────────────────────── */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; color: var(--text-muted); margin-bottom: 6px; font-weight: 500; }
.form-group input, .form-group select {
  width: 100%;
  padding: 10px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
}
.form-group input:focus, .form-group select:focus { border-color: var(--primary); }

.btn {
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { background: var(--danger-hover); }
.btn-ghost { background: transparent; color: var(--text-muted); border: 1px solid var(--border); }
.btn-ghost:hover { background: var(--bg-hover); color: var(--text); }
.btn-sm { padding: 6px 12px; font-size: 12px; }
.btn-full { width: 100%; justify-content: center; }

.error-msg {
  background: rgba(239,68,68,0.1);
  border: 1px solid var(--danger);
  border-radius: var(--radius);
  padding: 10px 14px;
  color: var(--danger);
  font-size: 13px;
  margin-bottom: 16px;
}

/* ─── Layout ──────────────────────────────────────────────── */
.app-header {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
}

.app-header .brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
}

.app-header nav { display: flex; gap: 8px; align-items: center; }
.app-header nav a {
  padding: 6px 12px;
  border-radius: var(--radius);
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s;
}
.app-header nav a:hover, .app-header nav a.active {
  background: var(--bg-hover);
  color: var(--text);
  text-decoration: none;
}

.app-content { max-width: 1200px; margin: 0 auto; padding: 24px; }

/* ─── Stats Cards ─────────────────────────────────────────── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
}

.stat-card .stat-label { font-size: 13px; color: var(--text-muted); margin-bottom: 4px; }
.stat-card .stat-value { font-size: 32px; font-weight: 700; }
.stat-card .stat-value.danger { color: var(--danger); }
.stat-card .stat-value.warning { color: var(--warning); }
.stat-card .stat-value.success { color: var(--success); }

/* ─── Table ───────────────────────────────────────────────── */
.table-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 24px;
}

.table-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.table-header h2 { font-size: 16px; font-weight: 600; }

table { width: 100%; border-collapse: collapse; }
thead th {
  text-align: left;
  padding: 12px 16px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border);
}
tbody td {
  padding: 12px 16px;
  font-size: 14px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--bg-hover); }

/* ─── Badges ──────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}
.badge-danger { background: rgba(239,68,68,0.15); color: var(--danger); }
.badge-warning { background: rgba(245,158,11,0.15); color: var(--warning); }
.badge-success { background: rgba(34,197,94,0.15); color: var(--success); }

/* ─── Countdown ───────────────────────────────────────────── */
.countdown {
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 15px;
  font-weight: 600;
}
.countdown.overdue { color: var(--danger); }
.countdown.warning { color: var(--warning); }
.countdown.ok { color: var(--success); }

/* ─── Modal ───────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
}

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  width: 100%;
  max-width: 460px;
  margin: 20px;
}

.modal h3 { font-size: 18px; margin-bottom: 16px; }

.modal-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 20px;
}

/* ─── Empty State ─────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}
.empty-state .icon { font-size: 48px; margin-bottom: 12px; }
.empty-state h3 { font-size: 18px; color: var(--text); margin-bottom: 8px; }

/* ─── Pulse Animation ─────────────────────────────────────── */
.pulse-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  display: inline-block;
  animation: pulse 2s infinite;
}
.pulse-dot.red { background: var(--danger); }
.pulse-dot.green { background: var(--success); }
.pulse-dot.yellow { background: var(--warning); }

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

/* ─── Responsive ──────────────────────────────────────────── */
@media (max-width: 768px) {
  .app-header { padding: 12px 16px; flex-wrap: wrap; gap: 8px; }
  .app-content { padding: 16px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  table { font-size: 13px; }
  thead th, tbody td { padding: 8px 10px; }
  .hide-mobile { display: none; }
}

/* ─── User Table ──────────────────────────────────────────── */
.user-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}
.user-card:last-child { border-bottom: none; }
.user-info { display: flex; flex-direction: column; gap: 2px; }
.user-name { font-weight: 600; font-size: 14px; }
.user-email { color: var(--text-muted); font-size: 13px; }
.user-actions { display: flex; gap: 6px; }

/* ─── Toast ───────────────────────────────────────────────── */
.toast-container { position: fixed; top: 20px; right: 20px; z-index: 300; display: flex; flex-direction: column; gap: 8px; }
.toast {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  font-size: 14px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
  animation: slideIn 0.3s;
  max-width: 360px;
}
.toast.success { border-left: 3px solid var(--success); }
.toast.error { border-left: 3px solid var(--danger); }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}