* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Segoe UI', Tahoma, sans-serif; }
:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --bg: #0f172a;
  --bg-light: #1e293b;
  --bg-card: #1e293b;
  --text: #f1f5f9;
  --text-dim: #94a3b8;
  --border: #334155;
}
body { background: var(--bg); color: var(--text); min-height: 100vh; }

/* ===== Login ===== */
.login-bg {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  display: flex; align-items: center; justify-content: center;
}
.login-container { width: 100%; max-width: 420px; padding: 20px; }
.login-card {
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(10px);
  border-radius: 20px;
  padding: 40px;
  box-shadow: 0 25px 50px rgba(0,0,0,0.3);
  color: #1e293b;
}
.login-logo { font-size: 60px; text-align: center; margin-bottom: 10px; }
.login-card h1 { text-align: center; color: #1e293b; margin-bottom: 5px; }
.login-card .subtitle { text-align: center; color: #64748b; margin-bottom: 30px; }
.login-card .form-group label { color: #334155; }
.login-card input { background: #f1f5f9; color: #1e293b; border: 1px solid #cbd5e1; }
.login-card input:focus { border-color: var(--primary); background: #fff; }

/* ===== App Layout ===== */
.app { display: flex; min-height: 100vh; }
.sidebar {
  width: 260px;
  background: var(--bg-light);
  border-left: 1px solid var(--border);
  display: flex; flex-direction: column;
  position: fixed; height: 100vh; right: 0;
}
.sidebar-header {
  padding: 25px 20px;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 12px;
}
.logo { font-size: 32px; }
.sidebar-header h2 { font-size: 18px; color: var(--text); }
.nav-menu { flex: 1; padding: 20px 10px; }
.nav-item {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 18px;
  color: var(--text-dim);
  text-decoration: none;
  border-radius: 10px;
  margin-bottom: 6px;
  transition: all 0.2s;
  font-size: 15px;
}
.nav-item:hover { background: rgba(99,102,241,0.1); color: var(--text); }
.nav-item.active {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  box-shadow: 0 4px 12px rgba(99,102,241,0.4);
}
.nav-item .icon { font-size: 20px; }
.sidebar-footer {
  padding: 20px;
  border-top: 1px solid var(--border);
}
.user-info { color: var(--text-dim); font-size: 14px; margin-bottom: 10px; }

.content { flex: 1; margin-right: 260px; padding: 0; }
.topbar {
  background: var(--bg-light);
  padding: 20px 30px;
  border-bottom: 1px solid var(--border);
  display: flex; justify-content: space-between; align-items: center;
}
.topbar h1 { font-size: 22px; }
.datetime { color: var(--text-dim); font-size: 14px; }

.tab-content { display: none; padding: 30px; }
.tab-content.active { display: block; }

/* ===== Toolbar ===== */
.toolbar {
  display: flex; gap: 10px; margin-bottom: 20px; flex-wrap: wrap;
}

/* ===== Buttons ===== */
.btn {
  padding: 10px 18px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  display: inline-flex; align-items: center; gap: 6px;
  transition: all 0.2s;
  color: white;
}
.btn-primary { background: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); }
.btn-success { background: var(--success); }
.btn-success:hover { background: #059669; }
.btn-warning { background: var(--warning); color: #1e293b; cursor: pointer; }
.btn-warning:hover { background: #d97706; }
.btn-danger { background: var(--danger); }
.btn-danger:hover { background: #dc2626; }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-outline:hover { background: var(--bg-card); }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-block { width: 100%; justify-content: center; padding: 12px; }
.btn-icon { padding: 6px 10px; font-size: 14px; }

/* ===== Cards & Tables ===== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}
.data-table { width: 100%; border-collapse: collapse; }
.data-table th, .data-table td {
  padding: 14px 18px;
  text-align: right;
  border-bottom: 1px solid var(--border);
}
.data-table th {
  background: rgba(99,102,241,0.1);
  color: var(--text);
  font-weight: 600;
  font-size: 14px;
}
.data-table tr:hover { background: rgba(255,255,255,0.02); }
.data-table tr:last-child td { border-bottom: none; }

/* ===== Forms ===== */
.form-group { margin-bottom: 18px; }
.form-group label {
  display: block;
  margin-bottom: 6px;
  font-size: 14px;
  color: var(--text-dim);
  font-weight: 500;
}
input[type="text"], input[type="password"], input[type="number"] {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 14px;
  transition: border 0.2s;
}
input:focus { outline: none; border-color: var(--primary); }

/* ===== Modal ===== */
.modal {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.7);
  z-index: 1000;
  align-items: center; justify-content: center;
  backdrop-filter: blur(4px);
}
.modal.show { display: flex; }
.modal-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  width: 90%; max-width: 480px;
  padding: 25px;
  animation: slideUp 0.3s;
}
@keyframes slideUp {
  from { transform: translateY(30px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}
.modal-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 20px;
}
.modal-header h3 { font-size: 18px; }
.close {
  background: none; border: none; color: var(--text-dim);
  font-size: 28px; cursor: pointer; line-height: 1;
}
.close:hover { color: var(--danger); }

/* ===== Badges ===== */
.badge {
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
}
.badge-active { background: rgba(16,185,129,0.2); color: var(--success); }
.badge-disabled { background: rgba(239,68,68,0.2); color: var(--danger); }

/* ===== Toast ===== */
.toast {
  position: fixed;
  bottom: 30px; left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 14px 24px;
  border-radius: 10px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.4);
  opacity: 0;
  transition: all 0.3s;
  z-index: 2000;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.success { border-color: var(--success); }
.toast.error { border-color: var(--danger); }

.alert { padding: 10px; border-radius: 8px; margin-bottom: 15px; font-size: 14px; }
.alert.error { background: rgba(239,68,68,0.15); color: var(--danger); border: 1px solid var(--danger); }

.actions-cell { display: flex; gap: 6px; }

@media (max-width: 768px) {
  .sidebar { width: 70px; }
  .sidebar-header h2, .nav-item span:not(.icon), .sidebar-footer .user-info { display: none; }
  .content { margin-right: 70px; }
}