:root {
    --bg-dark: #0f172a;
    --bg-card: #1e293b;
    --bg-card-hover: #334155;
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --accent: #06b6d4;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border-color: #334155;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
    --radius: 12px;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background-color: #0b1120;
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 1.5rem 1rem;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 2rem;
    padding: 0 0.5rem;
}

.brand-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
}

.nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    flex: 1;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--text-muted);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.2s ease;
}

.nav-link:hover, .nav-link.active {
    background-color: var(--bg-card);
    color: var(--text-main);
}

.nav-link.active {
    border-left: 4px solid var(--primary);
}

.logout-btn {
    margin-top: auto;
    color: var(--danger);
}

/* Main Content Area */
.main-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

.header {
    height: 70px;
    background-color: #0b1120;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
}

.page-title {
    font-size: 1.5rem;
    font-weight: 600;
}

.user-badge {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--bg-card);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    font-size: 0.875rem;
}

.content-body {
    padding: 2rem;
    flex: 1;
}

/* KPI Cards Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.stat-card .title {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-weight: 600;

}

.stat-card .value {
    font-size: 2rem;
    font-weight: 700;
}

/* Tables */
.table-container {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

.data-table th {
    background-color: #111827;
    color: var(--text-muted);
    padding: 1rem 1.25rem;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.data-table td {
    padding: 1rem 1.25rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.9rem;
}

.data-table tr:hover {
    background-color: var(--bg-card-hover);
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.65rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: lowercase;
}

.badge-success { background: rgba(16, 185, 129, 0.2); color: #34d399; }
.badge-warning { background: rgba(245, 158, 11, 0.2); color: #fbbf24; }
.badge-danger { background: rgba(239, 68, 68, 0.2); color: #f87171; }
.badge-info { background: rgba(59, 130, 246, 0.2); color: #60a5fa; }
.badge-secondary { background: rgba(148, 163, 184, 0.2); color: #cbd5e1; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    border: none;
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.2s ease;
}

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-sm { padding: 0.35rem 0.75rem; font-size: 0.8rem; }

/* Form styles for login */
.login-body {
    justify-content: center;
    align-items: center;
}

.login-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    width: 100%;
    max-width: 400px;
    padding: 2.5rem;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
    color: var(--text-muted);
}

.form-input {
    width: 100%;
    padding: 0.75rem;
    background: #0f172a;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: #fff;
    font-size: 0.9rem;
}

.form-input:focus {
    outline: 2px solid var(--primary);
}