/* ================================================================
   Yuh ASN LMS — Global Design System
   Covers: All pages | All roles | Bootstrap 5 + DataTables
   ================================================================ */

@import url("https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&display=swap");

/* ── 1. CSS Variables ─────────────────────────────────────────── */
:root {
    --primary: #0d6efd;
    --primary-dark: #0b5ed7;
    --primary-light: #e7f1ff;
    --success: #16a34a;
    --success-light: #f0fdf4;
    --warning: #d97706;
    --warning-light: #fffbeb;
    --danger: #dc2626;
    --danger-light: #fef2f2;
    --info: #0891b2;
    --info-light: #ecfeff;

    --bg: #f1f5f9;
    --card-bg: #ffffff;
    --border: #e8ecf0;
    --border-light: #f1f5f9;

    --text-dark: #0f172a;
    --text-body: #374151;
    --text-muted: #6b7280;
    --text-faint: #9ca3af;
    --text-ghost: #c4cad4;

    --placeholder-color: #b0b8c4; /* visually different from real text */

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;

    --shadow-xs: 0 1px 3px rgba(13, 110, 253, 0.04);
    --shadow-sm: 0 4px 14px rgba(13, 110, 253, 0.06);
    --shadow-md: 0 10px 24px rgba(13, 110, 253, 0.08);
    --shadow-lg: 0 15px 35px rgba(13, 110, 253, 0.12);

    --sidebar-w: 260px;
    --sidebar-bg: #070d23; /* fallback */
}

/* ── 2. Base & Typography ─────────────────────────────────────── */
*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    font-family: "Outfit", sans-serif;
    background-color: var(--bg);
    color: var(--text-body);
    overflow-x: hidden;
    font-size: 14.5px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Custom Global Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: rgba(13, 110, 253, 0.25);
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(13, 110, 253, 0.45);
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: "Outfit", sans-serif;
    color: var(--text-dark);
    font-weight: 700;
}

a {
    transition: color 0.15s;
}

/* ── 3. Global Form Controls ──────────────────────────────────── */
/* All text inputs, selects, textareas — consistent clean look    */

.form-control,
.form-select,
input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="search"],
input[type="url"],
input[type="tel"],
input[type="date"],
input[type="time"],
select,
textarea {
    background-color: #f8fafc;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-dark);
    font-family: "Outfit", sans-serif;
    font-size: 14px;
    font-weight: 500;
    padding: 10px 14px;
    transition: border-color 0.2s ease, box-shadow 0.2s ease,
        background-color 0.2s ease;
    outline: none;
    width: 100%;
    box-shadow: none;
}

/* ── PLACEHOLDER: clearly lighter than real typed text ── */
.form-control::placeholder,
.form-select::placeholder,
input::placeholder,
textarea::placeholder {
    color: var(--placeholder-color) !important;
    font-weight: 400;
    opacity: 1;
}

/* Firefox */
.form-control::-moz-placeholder,
input::-moz-placeholder,
textarea::-moz-placeholder {
    color: var(--placeholder-color);
    opacity: 1;
}

/* ── Focus State ── */
.form-control:focus,
.form-select:focus,
input:focus,
select:focus,
textarea:focus {
    background-color: #ffffff;
    border-color: var(--primary) !important;
    box-shadow: 0 0 0 3.5px rgba(37, 99, 235, 0.13) !important;
    color: var(--text-dark);
    outline: none;
}

/* ── Filled State: green border when has value ── */
.form-control:not(:placeholder-shown):not(:focus),
input[type="text"]:not(:placeholder-shown):not(:focus),
input[type="email"]:not(:placeholder-shown):not(:focus),
input[type="number"]:not(:placeholder-shown):not(:focus),
input[type="search"]:not(:placeholder-shown):not(:focus),
textarea:not(:placeholder-shown):not(:focus) {
    background-color: #ffffff;
    border-color: #86efac;
    color: var(--text-dark);
}

/* ── Error State ── */
.form-control.is-invalid,
input.is-invalid,
select.is-invalid,
textarea.is-invalid {
    border-color: var(--danger) !important;
    background-color: #fff8f8;
}
.form-control.is-invalid:focus,
input.is-invalid:focus {
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.12) !important;
}
.invalid-feedback {
    font-size: 12px;
    font-weight: 500;
    color: var(--danger);
    margin-top: 5px;
    display: flex;
    align-items: center;
    gap: 4px;
}

/* ── Select arrow ── */
.form-select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%236b7280' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14 2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 13px center;
    padding-right: 36px;
    appearance: none;
    cursor: pointer;
}
select:not(.form-select) {
    appearance: none;
    -webkit-appearance: none;
    cursor: pointer;
}

/* ── Form Labels ── */
.form-label,
label {
    font-size: 12.5px;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 7px;
    display: block;
}
/* Keep Bootstrap form-check label normal */
.form-check-label {
    text-transform: none;
    letter-spacing: 0;
    font-size: 13.5px;
    font-weight: 500;
    color: var(--text-body);
}

/* ── Input Groups ── */
.input-group .input-group-text {
    background: #f8fafc;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-faint);
    font-size: 14px;
    padding: 10px 14px;
    transition: border-color 0.2s, color 0.2s;
}
.input-group .form-control:focus ~ .input-group-text,
.input-group:focus-within .input-group-text {
    border-color: var(--primary);
    color: var(--primary);
}
.input-group .form-control {
    border-radius: 0 var(--radius-md) var(--radius-md) 0 !important;
}
.input-group .input-group-text:first-child {
    border-right: none;
    border-radius: var(--radius-md) 0 0 var(--radius-md) !important;
}
.input-group .form-control:not(:first-child) {
    border-left: none;
}

/* ── Checkbox & Radio ── */
.form-check-input {
    width: 17px;
    height: 17px;
    border: 1.5px solid var(--border);
    border-radius: 5px;
    cursor: pointer;
    transition: border-color 0.15s, background-color 0.15s;
}
.form-check-input:checked {
    background-color: var(--primary);
    border-color: var(--primary);
}
.form-check-input:focus {
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* ── Form Text / Hint ── */
.form-text {
    font-size: 11.5px;
    color: var(--text-ghost);
    margin-top: 5px;
    display: block;
}

/* ── 4. Buttons ───────────────────────────────────────────────── */
.btn {
    font-family: "Outfit", sans-serif;
    font-weight: 700;
    font-size: 13.5px;
    border-radius: var(--radius-md);
    padding: 9px 20px;
    transition: all 0.15s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    border-width: 1.5px;
    cursor: pointer;
}
.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-color: transparent;
    color: #fff;
    box-shadow: 0 3px 12px rgba(37, 99, 235, 0.35);
}
.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), #094eb8);
    box-shadow: 0 5px 16px rgba(37, 99, 235, 0.45);
    color: #fff;
    transform: translateY(-1px);
}

.btn-success {
    background: linear-gradient(135deg, #16a34a, #15803d);
    border-color: transparent;
    color: #fff;
    box-shadow: 0 3px 10px rgba(22, 163, 74, 0.3);
}
.btn-success:hover {
    background: linear-gradient(135deg, #15803d, #166534);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 5px 14px rgba(22, 163, 74, 0.4);
}

.btn-danger {
    background: linear-gradient(135deg, #dc2626, #b91c1c);
    border-color: transparent;
    color: #fff;
    box-shadow: 0 3px 10px rgba(220, 38, 38, 0.25);
}
.btn-danger:hover {
    background: linear-gradient(135deg, #b91c1c, #991b1b);
    color: #fff;
    transform: translateY(-1px);
}

.btn-warning {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    border-color: transparent;
    color: #fff;
    box-shadow: 0 3px 10px rgba(245, 158, 11, 0.3);
}
.btn-warning:hover {
    color: #fff;
    transform: translateY(-1px);
}

.btn-info {
    background: linear-gradient(135deg, #0891b2, #0e7490);
    border-color: transparent;
    color: #fff;
}
.btn-info:hover {
    color: #fff;
    transform: translateY(-1px);
}

.btn-secondary {
    background: #f1f5f9;
    border-color: var(--border);
    color: var(--text-body);
}
.btn-secondary:hover {
    background: #e2e8f0;
    color: var(--text-dark);
}

.btn-light {
    background: #fff;
    border-color: var(--border);
    color: var(--text-body);
    box-shadow: var(--shadow-xs);
}
.btn-light:hover {
    background: #f8fafc;
    border-color: #d1d5db;
}

/* Outline variants */
.btn-outline-primary {
    border-color: var(--primary);
    color: var(--primary);
}
.btn-outline-primary:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-1px);
}
.btn-outline-danger {
    border-color: #fca5a5;
    color: var(--danger);
    background: var(--danger-light);
}
.btn-outline-danger:hover {
    background: #fee2e2;
    border-color: var(--danger);
    color: var(--danger);
}
.btn-outline-success {
    border-color: #86efac;
    color: var(--success);
    background: var(--success-light);
}
.btn-outline-success:hover {
    background: #dcfce7;
    color: var(--success);
}
.btn-outline-secondary {
    border-color: var(--border);
    color: var(--text-muted);
}
.btn-outline-secondary:hover {
    background: #f1f5f9;
    color: var(--text-dark);
}
.btn-outline-warning {
    border-color: #fcd34d;
    color: var(--warning);
    background: var(--warning-light);
}
.btn-outline-warning:hover {
    background: #fef3c7;
    color: var(--warning);
}
.btn-outline-info {
    border-color: #67e8f9;
    color: var(--info);
    background: var(--info-light);
}

/* Sizes */
.btn-sm {
    padding: 6px 14px;
    font-size: 12px;
    border-radius: var(--radius-sm);
}
.btn-lg {
    padding: 12px 28px;
    font-size: 15px;
    border-radius: var(--radius-lg);
}

/* ── 5. Cards ─────────────────────────────────────────────────── */
.card {
    background: var(--card-bg);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.25s ease, transform 0.25s ease;
}
/* Disable hover lift on cards that have tables/forms */
.card.no-hover:hover {
    transform: none;
    box-shadow: var(--shadow-sm);
}
.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

/* ── 6. Tables ────────────────────────────────────────────────── */
.table {
    font-size: 13.5px;
    color: var(--text-body);
    border-collapse: separate;
    border-spacing: 0;
    width: 100%;
}
.table th {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-faint);
    padding: 12px 16px;
    background: #f9fafb;
    border-bottom: 2px solid var(--border-light);
    white-space: nowrap;
}
.table td {
    padding: 13px 16px;
    border-bottom: 1px solid var(--border-light);
    vertical-align: middle;
    color: var(--text-body);
}
.table tbody tr {
    transition: all 0.25s ease;
}
.table tbody tr:last-child td {
    border-bottom: none;
}
.table tbody tr:hover {
    background-color: #f8fafc;
    transform: translateY(-1px);
    box-shadow: 0 2px 10px rgba(13, 110, 253, 0.05);
    z-index: 1;
    position: relative;
}
.table-light thead th,
.table-light th {
    background-color: #f9fafb !important;
}

/* Remove Bootstrap's default border on table */
.table.border-0 td,
.table.border-0 th {
    border-color: var(--border-light);
}

/* ── 7. Badges ────────────────────────────────────────────────── */
.badge {
    font-size: 11px;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 20px;
    letter-spacing: 0.02em;
}
/* Bootstrap subtle badge overrides */
.bg-primary-subtle {
    background-color: #dbeafe !important;
}
.bg-success-subtle {
    background-color: #dcfce7 !important;
}
.bg-warning-subtle {
    background-color: #fef3c7 !important;
}
.bg-danger-subtle {
    background-color: #fee2e2 !important;
}
.bg-info-subtle {
    background-color: #cffafe !important;
}
.bg-secondary-subtle {
    background-color: #f3f4f6 !important;
}
.text-primary-subtle {
    color: #1d4ed8 !important;
}
.text-success {
    color: #16a34a !important;
}
.text-warning {
    color: #d97706 !important;
}
.text-danger {
    color: #dc2626 !important;
}

/* ── 8. Alerts ────────────────────────────────────────────────── */
.alert {
    border: none;
    border-radius: var(--radius-md);
    font-size: 13.5px;
    font-weight: 500;
    padding: 13px 16px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}
.alert-success {
    background: #ecfdf5;
    color: #065f46;
    border-left: 4px solid #10b981;
}
.alert-danger {
    background: #fef2f2;
    color: #991b1b;
    border-left: 4px solid #ef4444;
}
.alert-warning {
    background: #fffbeb;
    color: #92400e;
    border-left: 4px solid #f59e0b;
}
.alert-info {
    background: #eff6ff;
    color: #1e40af;
    border-left: 4px solid #3b82f6;
}
.alert-light {
    background: #f9fafb;
    color: var(--text-muted);
    border-left: 4px solid #e5e7eb;
}

.alert-dismissible .btn-close {
    position: static;
    margin-left: auto;
    flex-shrink: 0;
    padding: 2px;
    opacity: 0.5;
}
.alert-dismissible .btn-close:hover {
    opacity: 1;
}

/* ── 9. Modals ────────────────────────────────────────────────── */
.modal-content {
    border: none;
    border-radius: var(--radius-xl);
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.15);
    overflow: hidden;
}
.modal-header {
    background: #fafafa;
    border-bottom: 1px solid var(--border-light);
    padding: 18px 24px;
}
.modal-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-dark);
}
.modal-body {
    padding: 24px;
}
.modal-footer {
    border-top: 1px solid var(--border-light);
    padding: 16px 24px;
    background: #fafafa;
}
.modal-backdrop {
    backdrop-filter: blur(3px);
}

/* ── 10. Sidebar ──────────────────────────────────────────────── */
.sidebar {
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-w);
    z-index: 1000;
    background: linear-gradient(180deg, #070d23 0%, #11367d 100%);
    transition: margin-left 0.3s ease;
    border-right: 1px solid rgba(255, 255, 255, 0.05);
    overflow-y: auto;
    scrollbar-width: none;
}
.sidebar::-webkit-scrollbar {
    display: none;
}

.sidebar .nav-link {
    color: #94a3b8;
    padding: 10px 14px;
    margin: 2px 12px;
    border-radius: var(--radius-md);
    font-size: 13.5px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0;
    transition: background 0.15s, color 0.15s;
}
.sidebar .nav-link i {
    width: 22px;
    margin-right: 10px;
    font-size: 14px;
    text-align: center;
    flex-shrink: 0;
}
.sidebar .nav-link:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.1);
}
.sidebar .nav-link.active {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.15);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    border-left: 3px solid #8faef1;
}

/* Spacing for Sidebar Section Titles */
.sidebar .text-uppercase {
    font-size: 10.5px !important;
    letter-spacing: 0.12em;
    opacity: 0.65;
    margin-bottom: 5px;
}

/* ── 11. Main Content ─────────────────────────────────────────── */
.main-content {
    margin-left: var(--sidebar-w);
    padding: 24px;
    min-height: 100vh;
}

/* ── 12. Navbar ───────────────────────────────────────────────── */
.navbar-premium {
    background: rgba(255, 255, 255, 0.88) !important;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(0, 0, 0, 0.06);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

/* ── 13. DataTables Overrides ─────────────────────────────────── */
.dataTables_wrapper .dataTables_filter input {
    background: #f8fafc;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-dark);
    font-family: "Outfit", sans-serif;
    font-size: 13.5px;
    padding: 8px 14px;
    margin-left: 8px;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
    width: auto;
}
.dataTables_wrapper .dataTables_filter input::placeholder {
    color: var(--placeholder-color);
    font-weight: 400;
}
.dataTables_wrapper .dataTables_filter input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
    background: #fff;
}
.dataTables_wrapper .dataTables_filter label {
    font-size: 12.5px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-faint);
    display: flex;
    align-items: center;
}
.dataTables_wrapper .dataTables_length select {
    background: #f8fafc;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 6px 28px 6px 10px;
    font-family: "Outfit", sans-serif;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-dark);
    outline: none;
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' fill='%236b7280' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14 2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    margin: 0 6px;
}
.dataTables_wrapper .dataTables_length select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}
.dataTables_wrapper .dataTables_info {
    font-size: 12.5px;
    color: var(--text-faint);
    padding-top: 12px;
}
.dataTables_wrapper .dataTables_paginate {
    padding-top: 10px;
}
.dataTables_wrapper .dataTables_paginate .paginate_button {
    border: 1.5px solid var(--border) !important;
    border-radius: var(--radius-sm) !important;
    background: #fff !important;
    color: var(--text-body) !important;
    font-size: 12.5px !important;
    font-weight: 600 !important;
    padding: 5px 11px !important;
    margin: 0 2px;
    transition: all 0.15s;
}
.dataTables_wrapper .dataTables_paginate .paginate_button:hover {
    background: var(--primary-light) !important;
    border-color: var(--primary) !important;
    color: var(--primary) !important;
}
.dataTables_wrapper .dataTables_paginate .paginate_button.current,
.dataTables_wrapper .dataTables_paginate .paginate_button.current:hover {
    background: var(--primary) !important;
    border-color: var(--primary) !important;
    color: #fff !important;
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
}
.dataTables_wrapper .dataTables_paginate .paginate_button.disabled,
.dataTables_wrapper .dataTables_paginate .paginate_button.disabled:hover {
    color: var(--text-ghost) !important;
    background: #f9fafb !important;
    border-color: var(--border-light) !important;
    cursor: default;
}

/* ── 14. Progress Bars ────────────────────────────────────────── */
.progress {
    height: 8px;
    border-radius: 20px;
    background: #f1f5f9;
    overflow: hidden;
}
.progress-bar {
    border-radius: 20px;
    background: linear-gradient(90deg, var(--primary), #6366f1);
    transition: width 0.5s ease;
}

/* ── 15. Auth Layout ──────────────────────────────────────────── */
/* Used by login & register pages */
.auth-card .card {
    border-radius: var(--radius-xl);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.12);
    border: none;
}
.auth-card .form-control,
.auth-card input {
    background: #f8fafc;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 14.5px;
    padding: 11px 15px;
}
.auth-card .form-control::placeholder,
.auth-card input::placeholder {
    color: var(--placeholder-color);
    font-weight: 400;
}
.auth-card .form-control:focus,
.auth-card input:focus {
    border-color: var(--primary);
    background: #fff;
    box-shadow: 0 0 0 3.5px rgba(37, 99, 235, 0.13);
}
.auth-card .input-group-text {
    background: #f8fafc;
    border-color: var(--border);
    color: var(--text-faint);
}

/* ── 16. Glassmorphism Helpers ────────────────────────────────── */
.glass-card {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.5);
    box-shadow: 0 8px 32px rgba(31, 38, 135, 0.07);
}
.glass-card-dark {
    background: rgba(15, 23, 42, 0.88);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid rgba(255, 255, 255, 0.06);
}

/* ── 17. Gradients ────────────────────────────────────────────── */
.bg-gradient-primary {
    background: linear-gradient(135deg, #3b82f6, #1d4ed8);
}
.bg-gradient-dark {
    background: linear-gradient(135deg, #1e293b, #0f172a);
}
.bg-gradient-premium {
    background: linear-gradient(135deg, #6366f1, #a855f7, #ec4899);
}
.bg-gradient-success {
    background: linear-gradient(135deg, #10b981, #059669);
}
.bg-gradient-warning {
    background: linear-gradient(135deg, #f59e0b, #d97706);
}

/* ── 18. Utility Classes ──────────────────────────────────────── */
.rounded-4 {
    border-radius: var(--radius-lg) !important;
}
.rounded-3 {
    border-radius: var(--radius-md) !important;
}
.shadow-sm {
    box-shadow: var(--shadow-sm) !important;
}
.shadow-md {
    box-shadow: var(--shadow-md) !important;
}

/* Text helpers */
.text-xs {
    font-size: 11px;
}
.text-sm {
    font-size: 12.5px;
}
.fw-extrabold {
    font-weight: 800;
}

/* ── 19. Course Player ────────────────────────────────────────── */
.course-player-container {
    display: grid;
    grid-template-columns: 3fr 1fr;
    gap: 1.5rem;
}

/* ── 20. Responsive ───────────────────────────────────────────── */
@media (max-width: 991.98px) {
    .sidebar {
        margin-left: calc(-1 * var(--sidebar-w));
    }
    .sidebar.active {
        margin-left: 0;
    }
    .main-content {
        margin-left: 0;
        padding: 16px;
    }
    .course-player-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 575.98px) {
    .main-content {
        padding: 12px;
    }
    .card {
        border-radius: var(--radius-md);
    }
    .btn {
        padding: 8px 16px;
        font-size: 13px;
    }
    .table th,
    .table td {
        padding: 10px 12px;
    }
}

/* ── 17. Premium Dropdowns ────────────────────────────────────── */
.dropdown-menu {
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.6) !important;
    box-shadow: var(--shadow-lg) !important;
    animation: dropdownSlide 0.25s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    transform-origin: top right;
}
@keyframes dropdownSlide {
    from { opacity: 0; transform: translateY(-8px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}