:root {
    --primary: #667eea;
    --primary-light: #7c8ff0;
    --primary-dark: #5568d3;
    --success: #28a745;
    --info: #17a2b8;
    --warning: #ffc107;
    --danger: #dc3545;
    --light: #f8f9fa;
    --dark: #212529;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #6c757d;
    --gray-700: #495057;
    --gray-800: #343a40;
    --sidebar-width: 260px;
    --topbar-height: 70px;
    --transition: 0.3s ease-in-out;
}

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

html, body {
    width: 100%;
    height: 100%;
}

body {
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f7f8fa;
    color: #5a6c7d;
    font-size: 0.95rem;
}

h1, h2, h3, h4, h5, h6 {
    color: #2c3e50;
    font-weight: 600;
}

.layout {
    display: flex;
    width: 100%;
    min-height: 100vh;
}

/* ===== SIDEBAR ===== */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    width: var(--sidebar-width);
    background: #fff;
    border-right: 1px solid var(--gray-200);
    display: flex;
    flex-direction: column;
    transition: margin-left var(--transition), width var(--transition);
    overflow-y: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    z-index: 100;
}

.sidebar::-webkit-scrollbar {
    width: 0;
    height: 0;
}

.sidebar.collapsed {
    margin-left: calc(var(--sidebar-width) * -1);
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1rem;
    border-bottom: 1px solid var(--gray-200);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    transition: opacity var(--transition);
}

.logo i {
    font-size: 1.75rem;
}

.btn-toggle {
    width: 40px;
    height: 40px;
    border: 1px solid var(--gray-300);
    background: transparent;
    color: var(--gray-600);
    border-radius: 0.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
    font-size: 1.1rem;
}

.btn-toggle:hover {
    background: var(--gray-100);
    color: var(--primary);
    transform: scale(1.05);
}

.btn-menu-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    color: var(--gray-600);
    cursor: pointer;
    font-size: 1.2rem;
    padding: 0;
    transition: all var(--transition);
    margin-right: 1rem;
}

.btn-menu-toggle:hover {
    color: var(--primary);
    transform: scale(1.1);
}

.sidebar-nav {
    flex: 1;
    /*padding: 1.5rem 0;*/
    overflow-y: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.sidebar-nav::-webkit-scrollbar {
    width: 0;
    height: 0;
}

.nav-section {
    margin-bottom: 0.5rem;
}

.nav-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 0.5rem 1.5rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.5rem;
    color: var(--gray-600);
    text-decoration: none;
    transition: all var(--transition);
}

.nav-link i {
    width: 20px;
    text-align: center;
}

.nav-link:hover,
.nav-link.active {
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary);
    border-right: 3px solid var(--primary);
}

/* ===== MAIN CONTENT ===== */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
}

/* ===== TOP BAR ===== */
.topbar {
    position: fixed;
    top: 0;
    left: var(--sidebar-width);
    right: 0;
    height: var(--topbar-height);
    background: #fff;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    gap: 1.5rem;
    z-index: 90;
}

.sidebar.collapsed + .main-content {
    margin-left: 0;
}

.sidebar.collapsed + .main-content .topbar {
    left: 0;
}

.sidebar.collapsed + .main-content .page-content {
    margin-left: 0;
}

.topbar-search {
    flex: 1;
    /*max-width: 400px;*/
}

.topbar-search input {
    background: var(--light);
    border: 1px solid var(--gray-300);
    border-radius: 0.5rem;
    padding: 0.6rem 1rem;
    font-size: 0.9rem;
    transition: all var(--transition);
}

.topbar-search input:focus {
    background: #fff;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.btn-icon {
    width: 40px;
    height: 40px;
    border: none;
    background: var(--light);
    color: var(--gray-600);
    border-radius: 0.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: all var(--transition);
    font-size: 1rem;
}

.btn-icon:hover {
    background: var(--primary);
    color: #fff;
}

.btn-icon .badge {
    position: absolute;
    top: -5px;
    right: -5px;
    background: var(--danger);
    color: #fff;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
}

.user-menu {
    margin-left: 1rem;
}

.btn-user {
    width: 40px;
    height: 40px;
    border: 2px solid var(--gray-300);
    border-radius: 50%;
    overflow: hidden;
    cursor: pointer;
    background: none;
    padding: 0;
    transition: all var(--transition);
}

.btn-user:hover {
    border-color: var(--primary);
}

.btn-user img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ===== PAGE CONTENT ===== */
.page-content {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
    margin-top: var(--topbar-height);
    min-height: calc(100vh - var(--topbar-height));
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.page-content::-webkit-scrollbar {
    width: 0;
    height: 0;
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.page-header h2 {
    font-size: 1.75rem;
    color: #2c3e50;
}

/* ===== CARDS ===== */
.card {
    border: none;
    border-radius: 0.75rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    transition: all var(--transition);
}

.card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.card-header {
    background: var(--light);
    border-bottom: 1px solid var(--gray-200);
    border-radius: 0.75rem 0.75rem 0 0;
    padding: 1.5rem;
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    background: var(--light);
    border-top: 1px solid var(--gray-200);
    border-radius: 0 0 0.75rem 0.75rem;
    padding: 1rem 1.5rem;
}

/* ===== BUTTONS ===== */
.btn {
    border-radius: 0.5rem;
    font-weight: 500;
    padding: 0.6rem 1.2rem;
    transition: all var(--transition);
    border: none;
    cursor: pointer;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    color: #fff;
}

.btn-outline-primary {
    border: 1px solid var(--primary);
    color: var(--primary);
    background: transparent;
}

.btn-outline-primary:hover {
    background: var(--primary);
    color: #fff;
}

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

.btn-success:hover {
    background: #218838;
    color: #fff;
}

.btn-outline-success {
    border: 1px solid var(--success);
    color: var(--success);
}

.btn-outline-success:hover {
    background: var(--success);
    color: #fff;
}

.btn-outline-danger {
    border: 1px solid var(--danger);
    color: var(--danger);
}

.btn-outline-danger:hover {
    background: var(--danger);
    color: #fff;
}

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

.btn-info:hover {
    background: #138496;
}

.btn-secondary {
    background: var(--gray-500);
    color: #fff;
}

.btn-secondary:hover {
    background: var(--gray-600);
}

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

.btn-danger:hover {
    background: #c82333;
}

.dropdown-toggle::after {
    display: none;
}

.dropdown-toggle::after {
    content: '';
    display: inline-block;
    width: 0.4em;
    height: 0.4em;
    margin-left: 0.5em;
    border-bottom: 2px solid currentColor;
    border-right: 2px solid currentColor;
    transform: rotate(-45deg);
    vertical-align: -0.2em;
}

/* ===== FORMS ===== */
.form-label {
    font-weight: 500;
    color: #2c3e50;
    margin-bottom: 0.5rem;
}

.form-control,
.form-select {
    border: 1px solid var(--gray-300);
    border-radius: 0.5rem;
    padding: 0.6rem 0.75rem;
    font-size: 0.95rem;
    transition: all var(--transition);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

textarea.form-control {
    resize: vertical;
    font-family: 'Courier New', monospace;
}

.font-monospace {
    font-family: 'Courier New', 'Courier', monospace;
    font-size: 0.9rem;
}

/* ===== TABLES ===== */
.table {
    margin-bottom: 0;
}

.table thead th {
    background: var(--light);
    border-bottom: 2px solid var(--gray-300);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--gray-600);
    padding: 1rem;
}

.table tbody tr {
    border-bottom: 1px solid var(--gray-200);
    transition: background var(--transition);
}

.table tbody tr:hover {
    background: var(--light);
}

.table tbody td {
    padding: 1rem;
    vertical-align: middle;
}

.table-hover tbody tr:hover {
    background-color: var(--light);
}

.table-responsive {
    overflow-x: inherit;
    -webkit-overflow-scrolling: touch;
}

/* ===== BADGES & LABELS ===== */
.badge {
    padding: 0.35rem 0.75rem;
    border-radius: 0.25rem;
    font-size: 0.8rem;
    font-weight: 500;
}

.badge.bg-primary {
    background-color: var(--primary) !important;
}

.badge.bg-success {
    background-color: var(--success) !important;
}

.badge.bg-info {
    background-color: var(--info) !important;
}

.badge.bg-warning {
    background-color: var(--warning) !important;
    color: #000;
}

.badge.bg-danger {
    background-color: var(--danger) !important;
}

/* ===== MODALS ===== */
.popup {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90%;
    /* max-width: 500px; */
    background: #fff;
    border-radius: 0.75rem;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    z-index: 2000;
    animation: slideIn 0.3s ease-out;
}

.popup-login {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90%;
    max-width: 500px;
    background: #fff;
    border-radius: 0.75rem;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    z-index: 2000;
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translate(-50%, -45%);
    }
    to {
        opacity: 1;
        transform: translate(-50%, -50%);
    }
}

.d-none {
    display: none !important;
}

/* ===== PAGINATION ===== */
.pagination {
    display: flex;
    list-style: none;
    gap: 0.25rem;
}

.page-link {
    padding: 0.4rem 0.75rem;
    border: 1px solid var(--gray-300);
    border-radius: 0.25rem;
    color: var(--gray-600);
    text-decoration: none;
    transition: all var(--transition);
}

.page-link:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.page-item.active .page-link {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.page-item.disabled .page-link {
    color: var(--gray-400);
    cursor: not-allowed;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        height: 100vh;
        z-index: 200;
    }
    
    .sidebar.collapsed {
        margin-left: calc(var(--sidebar-width) * -1);
    }
    
    .btn-menu-toggle {
        display: flex !important;
    }

    .topbar {
        padding: 0 1rem;
    }

    .topbar-search {
        max-width: 100%;
        display: none;
    }

    .page-content {
        padding: 1rem;
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .btn-group {
        width: 100%;
        flex-wrap: wrap;
    }
}

@media (max-width: 576px) {
    :root {
        --sidebar-width: 100%;
    }

    .sidebar {
        width: 100%;
    }

    .topbar-actions {
        gap: 0.5rem;
    }

    .btn {
        padding: 0.5rem 0.8rem;
        font-size: 0.85rem;
    }

    .card-header,
    .card-body,
    .card-footer {
        padding: 1rem;
    }

    .table thead th,
    .table tbody td {
        padding: 0.75rem 0.5rem;
        font-size: 0.85rem;
    }
}