* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

:root {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-card: #1e293b;
  --bg-hover: #334155;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --border: #334155;
  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #0ea5e9;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-main);
  height: 100vh;
  overflow: hidden;
}

/* Overlay & Login */
.overlay {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(8px);
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.overlay.active {
  display: flex !important;
}

.login-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  padding: 36px;
  border-radius: 12px;
  width: 100%;
  maxWidth: 420px;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
}

.login-header {
  text-align: center;
  margin-bottom: 24px;
}

.brand-logo {
  font-size: 44px;
  margin-bottom: 12px;
}

.login-header h2 {
  font-size: 20px;
  margin-bottom: 6px;
}

.login-header p {
  color: var(--text-muted);
  font-size: 14px;
}

/* App Layout */
.app-container {
  display: flex;
  height: 100vh;
}

.sidebar {
  width: 260px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
}

.sidebar-brand {
  padding: 24px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 18px;
  font-weight: 700;
  border-bottom: 1px solid var(--border);
}

.sidebar-nav {
  flex: 1;
  padding: 20px 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: transparent;
  color: var(--text-muted);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  text-align: left;
  transition: all 0.2s;
}

.nav-item:hover {
  background: var(--bg-hover);
  color: var(--text-main);
}

.nav-item.active {
  background: var(--accent);
  color: white;
}

.sidebar-footer {
  padding: 16px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.admin-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.avatar {
  width: 36px;
  height: 36px;
  background: var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.details {
  display: flex;
  flex-direction: column;
}

.admin-name {
  font-size: 13px;
  font-weight: 600;
}

.admin-role {
  font-size: 11px;
  color: var(--text-muted);
}

.btn-logout {
  background: transparent;
  border: 1px solid var(--border);
  padding: 6px 10px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 16px;
}

/* Main Area */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  background: var(--bg-primary);
}

.topbar {
  padding: 20px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
}

.topbar h1 {
  font-size: 22px;
  font-weight: 700;
}

.tab-content {
  display: none;
  padding: 32px;
}

.tab-content.active {
  display: block;
}

/* Stats Cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
}

.icon-blue { background: rgba(14, 165, 233, 0.15); color: #0ea5e9; }
.icon-green { background: rgba(16, 185, 129, 0.15); color: #10b981; }
.icon-purple { background: rgba(99, 102, 241, 0.15); color: #6366f1; }
.icon-orange { background: rgba(245, 158, 11, 0.15); color: #f59e0b; }
.icon-red { background: rgba(239, 68, 68, 0.15); color: #ef4444; }

.stat-info {
  display: flex;
  flex-direction: column;
}

.stat-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.stat-value {
  font-size: 24px;
  font-weight: 700;
}

/* Panels */
.dashboard-sections {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
}

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

.quick-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Forms & Buttons */
.form-group {
  margin-bottom: 16px;
}

.form-row {
  display: flex;
  gap: 16px;
}

.form-group.col {
  flex: 1;
}

label {
  display: block;
  font-size: 13px;
  margin-bottom: 6px;
  color: var(--text-muted);
}

input[type="text"],
input[type="password"],
input[type="number"],
input[type="date"],
select,
textarea {
  width: 100%;
  padding: 10px 14px;
  background: #090d16;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-main);
  font-size: 14px;
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.checkbox-group label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  color: var(--text-main);
}

.btn {
  padding: 10px 18px;
  border-radius: 6px;
  border: none;
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
}

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

.btn-secondary { background: var(--bg-hover); color: var(--text-main); }
.btn-secondary:hover { background: #475569; }

.btn-success { background: var(--success); color: white; }
.btn-purple { background: #8b5cf6; color: white; }
.btn-danger { background: var(--danger); color: white; }
.btn-warning { background: var(--warning); color: #000; }
.btn-sm { padding: 6px 10px; font-size: 12px; }
.btn-block { width: 100%; }

/* Table */
.table-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.tip-text {
  font-size: 13px;
  color: var(--text-muted);
}

.table-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 13px;
}

th, td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
}

th {
  background: #141d2e;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  font-size: 11px;
}

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

/* Badges */
.badge {
  display: inline-block;
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
}

.badge-success { background: rgba(16, 185, 129, 0.2); color: #10b981; }
.badge-warning { background: rgba(245, 158, 11, 0.2); color: #f59e0b; }
.badge-danger { background: rgba(239, 68, 68, 0.2); color: #ef4444; }
.badge-info { background: rgba(14, 165, 233, 0.2); color: #0ea5e9; }

/* Modals */
.modal {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  z-index: 2000;
  align-items: center;
  justify-content: center;
}

.modal.active {
  display: flex;
}

.modal-dialog {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 10px;
  width: 100%;
  max-width: 540px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.6);
}

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

.modal-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 24px;
  cursor: pointer;
}

.modal-body {
  padding: 24px;
  max-height: 70vh;
  overflow-y: auto;
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

.alert-error {
  padding: 10px 14px;
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid var(--danger);
  color: #fca5a5;
  border-radius: 6px;
  font-size: 13px;
  margin-bottom: 16px;
}

/* Guide */
.guide-panel {
  max-width: 800px;
  margin: 0 auto;
}

.code-box {
  background: #090d16;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 16px;
  margin: 16px 0 24px 0;
  overflow-x: auto;
}

.code-box pre {
  color: #38bdf8;
  font-family: Consolas, monospace;
  font-size: 13px;
}

.guide-steps {
  margin-top: 16px;
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  font-size: 14px;
}