:root {
    --primary: #5867dd;
    --primary-light: rgba(88, 103, 221, 0.1);
    --secondary: #e2e5ec;
    --success: #34bfa3;
    --info: #36a3f7;
    --warning: #ffb822;
    --danger: #fd3995;

    --bg-main: #f4f5f8;
    --bg-white: #ffffff;
    --sidebar-width: 260px;
    --header-height: 70px;

    --text-main: #48465b;
    --text-muted: #74788d;
    --border-color: #ebedf2;
    --card-shadow: 0 0 20px 0 rgba(103, 92, 139, 0.05);
}

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

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-size: 14px;
    overflow-x: hidden;
}

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

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-white);
    border-right: 1px solid var(--border-color);
    flex-shrink: 0;
    position: fixed;
    height: 100vh;
    z-index: 100;
}

.logo-section {
    height: var(--header-height);
    display: flex;
    align-items: center;
    padding: 0 25px;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 20px;
    color: var(--primary);
}

.menu {
    padding: 20px 0;
}

.menu-item {
    padding: 12px 25px;
    display: flex;
    align-items: center;
    gap: 15px;
    color: var(--text-main);
    text-decoration: none;
    transition: all 0.3s;
    cursor: pointer;
}

.menu-item:hover,
.menu-item.active {
    background: var(--primary-light);
    color: var(--primary);
    border-right: 3px solid var(--primary);
}

.menu-label {
    padding: 15px 25px 5px;
    font-size: 11px;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 1px;
    font-weight: 600;
}

/* Main Content */
.main-panel {
    margin-left: var(--sidebar-width);
    flex-grow: 1;
    min-width: 0;
}

.header {
    height: var(--header-height);
    background: var(--bg-white);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 30px;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 99;
}

.page-title h2 {
    font-size: 18px;
    font-weight: 600;
}

.content {
    padding: 30px;
}

/* UI Components */
.card {
    background: var(--bg-white);
    border-radius: 10px;
    padding: 25px;
    box-shadow: var(--card-shadow);
    margin-bottom: 30px;
}

.btn {
    padding: 10px 20px;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
}

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

.btn-primary:hover {
    background: #4a59c7;
}

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

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

.btn-secondary {
    background: var(--secondary);
    color: var(--text-main);
}

/* Table */
.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th {
    text-align: left;
    padding: 15px;
    background: #f7f8fa;
    color: var(--text-muted);
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
}

.data-table td {
    padding: 15px;
    border-bottom: 1px solid var(--border-color);
}

.badge {
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
}

.badge-success {
    background: rgba(52, 191, 163, 0.1);
    color: var(--success);
}

.badge-danger {
    background: rgba(253, 57, 149, 0.1);
    color: var(--danger);
}

.badge-info {
    background: rgba(54, 163, 247, 0.1);
    color: var(--info);
}

/* Login Page */
.login-container {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-card {
    width: 400px;
    padding: 40px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal {
    background: white;
    border-radius: 12px;
    padding: 30px;
    width: 500px;
    max-width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 13px;
}

.form-control {
    width: 100%;
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    outline: none;
    transition: border 0.3s;
}

.form-control:focus {
    border-color: var(--primary);
}

.grid-3 {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 20px;
}