:root {
    --primary-color: #2c5f7c;
    --accent-color: #FFC107;
    --success-color: #4CAF50;
    --error-color: #f44336;
    --warning-color: #ff9800;
    --bg-light: #f5f7fa;
    --bg-white: #ffffff;
    --text-dark: #333333;
    --text-light: #666666;
    --border-color: #e0e0e0;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.15);
}

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

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

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

/* Sidebar */
.sidebar {
    width: 260px;
    background: linear-gradient(180deg, #2c5f7c 0%, #1e4057 100%);
    color: white;
    padding: 2rem 0;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    box-shadow: 2px 0 12px rgba(0, 0, 0, 0.1);
}

.sidebar .logo {
    font-size: 1.5rem;
    font-weight: 700;
    padding: 0 2rem 2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 2rem;
}

.sidebar ul {
    list-style: none;
    padding: 0 1rem;
}

.sidebar a {
    display: flex;
    align-items: center;
    padding: 1rem 1.25rem;
    margin-bottom: 0.5rem;
    color: rgba(255, 255, 255, 1);
    text-decoration: none;
    transition: all 0.3s ease;
    border-radius: 8px;
    font-weight: 500;
    font-size: 1.1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar a:hover {
    background: rgba(255, 255, 255, 0.15);
    color: white;
    transform: translateX(4px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.sidebar a.active {
    background: var(--accent-color);
    color: #000000;
    font-weight: 700;
    box-shadow: 0 4px 12px rgba(255, 193, 7, 0.3);
    border-color: var(--accent-color);
}

.sidebar a i {
    margin-right: 1rem;
    font-size: 1.3rem;
    width: 24px;
    text-align: center;
}

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

/* Topbar */
.topbar {
    background: var(--bg-white);
    padding: 1.5rem 2rem;
    box-shadow: var(--shadow);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.topbar h1 {
    font-size: 1.75rem;
    color: var(--primary-color);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-info span {
    color: var(--text-light);
}

/* Container */
.container {
    padding: 2rem;
    max-width: 1400px;
}

/* Cards */
.card {
    background: var(--bg-white);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    margin-bottom: 1.5rem;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-color);
}

/* Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: linear-gradient(135deg, var(--primary-color), #3d7a9c);
    color: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
}

.stat-card.accent {
    background: linear-gradient(135deg, var(--accent-color), #ffd54f);
    color: var(--text-dark);
}

.stat-card.success {
    background: linear-gradient(135deg, var(--success-color), #66bb6a);
}

.stat-card.info {
    background: linear-gradient(135deg, #7b1fa2, #ab47bc);
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.95rem;
    opacity: 0.9;
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

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

.btn-primary:hover {
    background: #1e4057;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-accent {
    background: var(--accent-color);
    color: var(--text-dark);
}

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

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

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
}

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

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

thead {
    background: var(--bg-light);
}

th {
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--primary-color);
    border-bottom: 2px solid var(--border-color);
}

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

tr:hover {
    background: #f9f9f9;
}

.badge {
    display: inline-block;
    padding: 0.35rem 0.75rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

.badge-success {
    background: #e8f5e9;
    color: var(--success-color);
}

.badge-warning {
    background: #fff3e0;
    color: var(--warning-color);
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-dark);
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(44, 95, 124, 0.1);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: 12px;
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
}

/* Loading */
.loading {
    text-align: center;
    padding: 3rem;
    color: var(--text-light);
}

.spinner {
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        width: 0;
        overflow: hidden;
    }

    .main-content {
        margin-left: 0;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }
}