:root {
    --primary-color: #DC143C;
    --primary-dark: #B91230;
    --primary-light: #FF6B8A;
    --secondary-color: #333333;
    --accent-color: #FF4757;
    --bg-light: #FFFFFF;
    --bg-gray: #F8F9FA;
    --text-dark: #1a1a1a;
    --text-light: #666666;
    --border-color: #E5E7EB;
    --success: #10B981;
    --warning: #F59E0B;
    --danger: #EF4444;
    --info: #3B82F6;
    --sidebar-width: 280px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-gray);
    color: var(--text-dark);
    line-height: 1.6;
}

/* SIDEBAR */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: linear-gradient(180deg, #1a1a1a 0%, #2d2d2d 100%);
    color: white;
    overflow: hidden;
    z-index: 1000;
    transition: transform 0.3s ease;
    display: flex;
    flex-direction: column;
    box-shadow: 2px 0 10px rgba(0,0,0,0.1);
}

.sidebar-header {
    padding: 30px 20px;
    text-align: center;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    flex-shrink: 0;
    background: rgba(220,20,60,0.1);
}

.sidebar-logo {
    max-width: 200px;
    height: auto;
    margin-bottom: 15px;
}

.sidebar-title {
    font-size: 13px;
    color: var(--primary-light);
    letter-spacing: 2px;
    font-weight: 600;
    text-transform: uppercase;
}

.sidebar-nav {
    padding: 20px 0;
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    overflow-x: hidden;
}

.nav-section {
    margin-bottom: 25px;
}

.nav-section:last-child {
    margin-bottom: 0;
    padding-bottom: 20px;
}

.nav-section-title {
    padding: 0 20px;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--primary-light);
    margin-bottom: 10px;
    font-weight: 700;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 14px 20px;
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background: rgba(220,20,60,0.15);
    color: white;
    border-left-color: var(--primary-color);
}

.nav-item.active {
    background: rgba(220,20,60,0.2);
    color: white;
    border-left-color: var(--primary-color);
}

.nav-icon {
    width: 22px;
    height: 22px;
    margin-right: 15px;
    opacity: 0.9;
}

.nav-text {
    font-size: 15px;
    font-weight: 500;
}

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
    flex-shrink: 0;
    background: rgba(0,0,0,0.3);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.user-avatar {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: white;
    font-size: 16px;
}

.user-details {
    flex: 1;
}

.user-name {
    font-size: 14px;
    font-weight: 600;
    color: white;
}

.user-role {
    font-size: 12px;
    color: var(--primary-light);
    text-transform: capitalize;
}

/* MAIN CONTENT */
.main-content {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    padding: 30px;
    background: var(--bg-gray);
}

.page-header {
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
}

.page-title {
    font-size: 32px;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.page-subtitle {
    color: var(--text-light);
    font-size: 15px;
}

/* CARDS */
.card {
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    padding: 25px;
    margin-bottom: 25px;
    border: 1px solid var(--border-color);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--bg-gray);
}

.card-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-dark);
}

/* STATS */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-bottom: 30px;
}

.stat-card {
    background: white;
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    border-left: 4px solid var(--primary-color);
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.15);
}

.stat-label {
    font-size: 13px;
    color: var(--text-light);
    text-transform: uppercase;
    margin-bottom: 10px;
    font-weight: 600;
}

.stat-value {
    font-size: 36px;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.stat-change {
    font-size: 14px;
    font-weight: 600;
}

.stat-change.positive { color: var(--success); }
.stat-change.negative { color: var(--danger); }

/* BUTTONS */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

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

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

.btn-secondary {
    background: var(--bg-gray);
    color: var(--text-dark);
}

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

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-dark);
    font-size: 14px;
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(220,20,60,0.1);
}

.form-select {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    background: white;
    cursor: pointer;
}

/* TABLE */
.table-container {
    overflow-x: auto;
    border-radius: 8px;
}

.table {
    width: 100%;
    border-collapse: collapse;
    background: white;
}

.table th {
    background: var(--primary-color);
    color: white;
    padding: 16px;
    text-align: left;
    font-weight: 700;
    font-size: 13px;
    text-transform: uppercase;
}

.table td {
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
}

.table tr:hover {
    background: #FEF2F2;
}

/* BADGES */
.badge {
    display: inline-block;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
}

.badge-success { background: #D1FAE5; color: #065F46; }
.badge-warning { background: #FEF3C7; color: #92400E; }
.badge-danger { background: #FEE2E2; color: #991B1B; }
.badge-info { background: #DBEAFE; color: #1E40AF; }

/* MODAL */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.6);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: 16px;
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    padding: 25px;
    border-bottom: 2px solid var(--border-color);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
}

.modal-title {
    font-size: 22px;
    font-weight: 700;
    color: white;
}

.modal-body {
    padding: 25px;
}

.modal-footer {
    padding: 20px 25px;
    border-top: 2px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    background: var(--bg-gray);
}

/* MOBILE */
.menu-toggle {
    display: none;
}

.sidebar-overlay {
    display: none;
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .sidebar-overlay.active {
        display: block;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0,0,0,0.6);
        z-index: 999;
    }
    
    .main-content {
        margin-left: 0;
        padding: 20px 15px;
        padding-top: 80px;
    }
    
    .menu-toggle {
        display: block;
        position: fixed;
        top: 20px;
        left: 20px;
        z-index: 1001;
        background: var(--primary-color);
        color: white;
        border: none;
        border-radius: 10px;
        padding: 12px 16px;
        cursor: pointer;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .card-header {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }
}

/* UTILITIES */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-1 { margin-top: 10px; }
.mt-2 { margin-top: 20px; }
.mb-1 { margin-bottom: 10px; }
.mb-2 { margin-bottom: 20px; }
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.gap-1 { gap: 10px; }
.gap-2 { gap: 20px; }