:root {
    --sidebar-width: 260px;
    --sidebar-bg: #1a1d29;
    --sidebar-hover: #252a3a;
    --sidebar-active: #2d3347;
    --accent: #c08497;
    --accent-dark: #a86b7f;
    --accent-light: #f3e3e7;
    --body-bg: #f5f6fa;
    --surface: #ffffff;
    --text-main: #1f2937;
    --text-muted: #6b7280;
    --border: #e5e7eb;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    --radius-sm: 8px;
    --radius: 14px;
    --radius-lg: 20px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--body-bg);
    color: var(--text-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    letter-spacing: -0.02em;
}

.page-title {
    font-family: 'Playfair Display', serif;
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text-main);
    margin: 0;
}

/* Layout */
#wrapper {
    min-height: 100vh;
}

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

.sidebar {
    width: var(--sidebar-width);
    min-height: 100vh;
    background: var(--sidebar-bg);
    color: #fff;
    position: fixed;
    z-index: 1030;
    display: flex;
    flex-direction: column;
    transition: margin 0.3s ease;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 24px;
    font-family: 'Playfair Display', serif;
    font-size: 1.35rem;
    font-weight: 700;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar-brand i {
    color: var(--accent);
    font-size: 1.5rem;
}

.sidebar-nav {
    list-style: none;
    padding: 16px 12px;
    margin: 0;
    flex: 1;
}

.sidebar-nav .nav-item {
    margin-bottom: 4px;
}

.sidebar-nav .nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: rgba(255, 255, 255, 0.75);
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-weight: 500;
    transition: all 0.2s ease;
}

.sidebar-nav .nav-link:hover {
    background: var(--sidebar-hover);
    color: #fff;
}

.sidebar-nav .nav-link.active {
    background: var(--sidebar-active);
    color: #fff;
    box-shadow: inset 3px 0 0 var(--accent);
}

.sidebar-nav .nav-link i {
    font-size: 1.15rem;
    width: 24px;
    text-align: center;
}

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.logout-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-weight: 500;
    transition: all 0.2s ease;
}

.logout-link:hover {
    background: rgba(239, 68, 68, 0.15);
    color: #fca5a5;
}

#page-content-wrapper {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-width: 0;
    transition: margin 0.3s ease;
}

.topbar {
    background: var(--surface);
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1020;
}

@media (max-width: 992px) {
    .sidebar {
        margin-left: calc(-1 * var(--sidebar-width));
    }

    #page-content-wrapper {
        margin-left: 0;
    }

    #wrapper.toggled .sidebar {
        margin-left: 0;
    }

    #wrapper.toggled #page-content-wrapper {
        margin-left: 0;
    }
}

/* Cards */
.card {
    background: var(--surface);
    border: none;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
    box-shadow: var(--shadow);
}

.card-header {
    background: transparent;
    border-bottom: 1px solid var(--border);
    padding: 18px 24px;
    font-weight: 600;
    color: var(--text-main);
}

.card-body {
    padding: 24px;
}

/* Stat cards */
.stat-card {
    border-radius: var(--radius);
    padding: 24px;
    color: #fff;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s ease;
}

.stat-card:hover {
    transform: translateY(-3px);
}

.stat-card .stat-icon {
    position: absolute;
    right: 18px;
    top: 18px;
    font-size: 3rem;
    opacity: 0.18;
}

.stat-card .stat-label {
    font-size: 0.85rem;
    font-weight: 500;
    opacity: 0.9;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-card .stat-value {
    font-size: 2.2rem;
    font-weight: 700;
    margin-top: 6px;
    font-variant-numeric: tabular-nums;
}

.stat-card.primary { background: linear-gradient(135deg, #c08497, #a86b7f); }
.stat-card.success { background: linear-gradient(135deg, #10b981, #059669); }
.stat-card.warning { background: linear-gradient(135deg, #f59e0b, #d97706); }
.stat-card.info { background: linear-gradient(135deg, #3b82f6, #2563eb); }

/* Buttons */
.btn {
    border-radius: 10px;
    font-weight: 500;
    padding: 0.55rem 1.1rem;
    transition: all 0.2s ease;
}

.btn:active {
    transform: scale(0.98);
}

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

.btn-primary:hover,
.btn-primary:focus {
    background: var(--accent-dark);
    border-color: var(--accent-dark);
    box-shadow: 0 4px 12px rgba(192, 132, 151, 0.3);
}

.btn-outline-primary {
    color: var(--accent-dark);
    border-color: var(--accent);
}

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

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

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

.btn-light {
    background: #f3f4f6;
    border-color: #e5e7eb;
    color: var(--text-main);
}

/* Tables */
.table {
    --bs-table-bg: transparent;
    --bs-table-border-color: var(--border);
    font-size: 0.95rem;
}

.table thead th {
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.04em;
    padding: 14px 18px;
    border-bottom: 1px solid var(--border);
}

.table tbody td {
    padding: 14px 18px;
    vertical-align: middle;
    color: var(--text-main);
}

.table-hover tbody tr:hover {
    background-color: #fafafa;
}

.table-responsive {
    border-radius: 0 0 var(--radius) var(--radius);
}

/* Badges */
.badge {
    font-weight: 500;
    padding: 0.45em 0.75em;
    border-radius: 8px;
    font-size: 0.8rem;
}

/* Forms */
.form-control,
.form-select {
    border-radius: 10px;
    border-color: var(--border);
    padding: 0.6rem 0.9rem;
    font-size: 0.95rem;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 0.2rem rgba(192, 132, 151, 0.2);
}

.form-label {
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text-main);
}

.form-check-input:checked {
    background-color: var(--accent);
    border-color: var(--accent);
}

/* Login */
.login-page {
    min-height: 100vh;
    background: linear-gradient(135deg, #f5f6fa 0%, #edeef3 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-card {
    width: 100%;
    max-width: 420px;
    border: none;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: 40px;
    background: var(--surface);
}

.login-brand {
    font-family: 'Playfair Display', serif;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-main);
    text-align: center;
    margin-bottom: 8px;
}

.login-subtitle {
    color: var(--text-muted);
    text-align: center;
    margin-bottom: 28px;
}

/* Calendar */
.calendar-table {
    table-layout: fixed;
    margin-bottom: 0;
}

.calendar-table th,
.calendar-table td {
    width: 14.28%;
    height: 95px;
    vertical-align: top;
}

.calendar-day {
    background: var(--surface);
    transition: background-color 0.15s;
    padding: 12px;
}

.calendar-day:hover {
    background: #f3f4f6;
}

.calendar-day .day-number {
    font-weight: 600;
    font-size: 1rem;
}

.calendar-day .badge {
    margin-top: 6px;
}

/* Day view */
.table-success {
    background-color: #d1fae5 !important;
    color: #065f46;
}

.table-danger {
    background-color: #fee2e2 !important;
    color: #991b1b;
}

/* Alerts */
.alert {
    border: none;
    border-radius: var(--radius-sm);
}

/* Empty state */
.empty-state {
    text-align: center;
    padding: 48px 24px;
    color: var(--text-muted);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 16px;
    color: var(--border);
}

/* Links */
a {
    color: var(--accent-dark);
    text-decoration: none;
}

a:hover {
    color: var(--accent);
}

/* Animations */
.fade-in {
    animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* DataTables override */
.dataTables_wrapper .dataTables_paginate .paginate_button.current,
.dataTables_wrapper .dataTables_paginate .paginate_button.current:hover {
    background: var(--accent) !important;
    color: #fff !important;
    border-color: var(--accent) !important;
    border-radius: 8px;
}

.dataTables_wrapper .dataTables_paginate .paginate_button:hover {
    background: var(--accent-light) !important;
    color: var(--accent-dark) !important;
    border-color: var(--accent) !important;
}