:root {
  --bg-primary: #060e1a;
  --bg-secondary: #0a1628;
  --bg-card: #0d1f35;
  --bg-card-hover: #112842;
  --accent: #00b4d8;
  --accent-hover: #38cfea;
  --accent-warm: #f97316;
  --accent-warm-hover: #fb923c;
  --text-primary: #eaf4f8;
  --text-secondary: #7da1b8;
  --border: rgba(0, 180, 216, 0.1);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --radius: 12px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

/* Layout */
.app-layout {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 260px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
  transition: var(--transition);
}

.sidebar-brand {
  padding: 24px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
}

.sidebar-brand img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.sidebar-brand h1 {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, var(--accent), var(--accent-warm));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: 8px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
}

.nav-item:hover {
  background: rgba(0, 180, 216, 0.1);
  color: var(--accent);
  text-decoration: none;
}

.nav-item.active {
  background: rgba(0, 180, 216, 0.15);
  color: var(--accent);
}

.nav-item svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border);
}

.sidebar-footer a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: 8px;
  color: #ff6b6b;
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
}

.sidebar-footer a svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.sidebar-footer a:hover {
  background: rgba(255, 107, 107, 0.1);
  text-decoration: none;
}

/* Main content */
.main-content {
  flex: 1;
  margin-left: 260px;
  padding: 32px;
  min-height: 100vh;
}

/* Top bar */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
}

.topbar h2 {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.card-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-header h3 {
  font-size: 16px;
  font-weight: 600;
}

.card-body {
  padding: 24px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  line-height: 1;
}

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

.btn-primary:hover {
  background: var(--accent-hover);
  color: white;
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 180, 216, 0.4);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  color: white;
  text-decoration: none;
}

.btn-danger {
  background: rgba(255, 71, 87, 0.15);
  color: #ff4757;
  border: 1px solid rgba(255, 71, 87, 0.2);
}

.btn-danger:hover {
  background: rgba(255, 71, 87, 0.25);
  color: #ff6b81;
  text-decoration: none;
}

.btn-edit {
  background: rgba(54, 162, 235, 0.15);
  color: #36a2eb;
  border: 1px solid rgba(54, 162, 235, 0.2);
}

.btn-edit:hover {
  background: rgba(54, 162, 235, 0.25);
  color: #5bb8f5;
  text-decoration: none;
}

.btn-sm {
  padding: 6px 14px;
  font-size: 13px;
}

/* Table */
.table-container {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

table th {
  padding: 12px 16px;
  text-align: left;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
}

table td {
  padding: 14px 16px;
  font-size: 14px;
  border-bottom: 1px solid var(--border);
}

table tr:last-child td {
  border-bottom: none;
}

table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

.actions {
  display: flex;
  gap: 8px;
}

/* Forms */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-input {
  width: 100%;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 14px;
  transition: var(--transition);
  outline: none;
}

.form-input:focus {
  border-color: var(--accent);
  background: rgba(0, 180, 216, 0.05);
  box-shadow: 0 0 0 3px rgba(0, 180, 216, 0.1);
}

.form-input::placeholder {
  color: var(--text-secondary);
}

/* Login page */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
  background-image:
    radial-gradient(at 20% 80%, rgba(0, 180, 216, 0.08) 0px, transparent 50%),
    radial-gradient(at 80% 20%, rgba(249, 115, 22, 0.06) 0px, transparent 50%);
}

.login-card {
  width: 100%;
  max-width: 420px;
  padding: 40px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow);
}

.login-logo {
  text-align: center;
  margin-bottom: 32px;
}

.login-logo img {
  width: 80px;
  height: 80px;
  border-radius: 16px;
  margin-bottom: 16px;
}

.login-logo h1 {
  font-size: 24px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent), var(--accent-warm));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.login-logo p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-top: 4px;
}

.login-card .btn-primary {
  width: 100%;
  padding: 14px;
  font-size: 15px;
  justify-content: center;
}

.login-footer {
  text-align: center;
  margin-top: 24px;
  font-size: 13px;
  color: var(--text-secondary);
}

.login-footer a {
  color: var(--text-secondary);
  text-decoration: none;
}

.login-footer a:hover {
  color: var(--accent);
}

/* Toast / Alerts */
.toast-container {
  position: fixed;
  top: 24px;
  right: 24px;
  z-index: 9999;
}

.toast {
  padding: 14px 20px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  animation: slideIn 0.3s ease;
  margin-bottom: 8px;
}

.toast-success {
  background: rgba(46, 213, 115, 0.15);
  color: #2ed573;
  border: 1px solid rgba(46, 213, 115, 0.2);
}

.toast-error {
  background: rgba(255, 71, 87, 0.15);
  color: #ff4757;
  border: 1px solid rgba(255, 71, 87, 0.2);
}

@keyframes slideIn {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 200;
}

.modal-overlay.active {
  display: flex;
}

.modal-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  max-width: 420px;
  width: 90%;
  box-shadow: var(--shadow);
}

.modal-box h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.modal-box p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 24px;
}

.modal-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-secondary);
}

.empty-state svg {
  width: 48px;
  height: 48px;
  margin-bottom: 16px;
  opacity: 0.5;
}

.empty-state h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.empty-state p {
  font-size: 14px;
}

/* Mobile toggle */
.mobile-toggle {
  display: none;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 8px;
  border-radius: 8px;
  cursor: pointer;
}

/* Responsive */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .main-content {
    margin-left: 0;
    padding: 20px;
  }

  .mobile-toggle {
    display: flex;
  }

  .topbar h2 {
    font-size: 20px;
  }
}