@import url("https://fonts.googleapis.com/css2?family=Instrument+Sans:wght@400;500;600;700&family=Sora:wght@500;600;700&display=swap");

:root {
    --bg: #ffffff;
    --bg-soft: #fff9ef;
    --bg-soft-2: #fff4df;
    --surface: #ffffff;
    --surface-muted: #fffdf9;
    --primary: #f58f00;
    --primary-deep: #cf7600;
    --secondary: #6f7a82;
    --accent: #ffbd60;
    --text: #20262b;
    --text-muted: #556169;
    --danger: #b53a26;
    --success: #2e7b39;
    --warning: #9a6200;
    --info: #1f66b1;
    --border: #d6dde2;
    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 18px;
    --shadow-sm: 0 10px 22px rgba(32, 38, 43, 0.08);
    --shadow-md: 0 16px 36px rgba(32, 38, 43, 0.12);
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: "Instrument Sans", "Segoe UI", sans-serif;
    background:
        radial-gradient(1400px 620px at 15% -20%, rgba(245, 143, 0, 0.08), transparent 60%),
        radial-gradient(1200px 520px at 100% 0, rgba(255, 189, 96, 0.16), transparent 58%),
        var(--bg);
    color: var(--text);
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.18s ease;
}

a:hover {
    color: var(--primary-deep);
    text-decoration: underline;
}

.container {
    width: min(1220px, 92%);
    margin: 0 auto;
}

.topbar {
    position: sticky;
    top: 0;
    z-index: 950;
    border-bottom: 1px solid var(--border);
    background: rgba(255, 249, 239, 0.94);
    backdrop-filter: blur(8px);
}

.topbar::after {
    content: "";
    display: block;
    height: 2px;
    background: linear-gradient(90deg, rgba(245, 143, 0, 0.4), rgba(255, 189, 96, 0.08));
}

.topbar-inner {
    min-height: 76px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
}

.brand a {
    color: var(--primary);
    font-family: "Sora", "Instrument Sans", sans-serif;
    font-weight: 600;
    font-size: 1.02rem;
    letter-spacing: 0.01em;
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.brand a:hover {
    text-decoration: none;
}

.brand-logo {
    width: clamp(110px, 12vw, 160px);
    max-width: 42vw;
    height: 40px;
    object-fit: contain;
    object-position: left center;
    display: block;
}

.main-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
}

.main-nav .nav-logout-form {
    display: inline-flex;
    margin: 0;
}

.main-nav .nav-logout-form button {
    margin: 0;
    cursor: pointer;
    font: inherit;
    appearance: none;
    -webkit-appearance: none;
    box-sizing: border-box;
}

.main-nav a,
.main-nav .nav-group > summary,
.main-nav .nav-logout-form button {
    color: var(--secondary);
    font-weight: 600;
    font-size: 0.88rem;
    border: 1px solid transparent;
    border-radius: 999px;
    padding: 8px 12px;
    background: transparent;
    transition:
        color 0.18s ease,
        border-color 0.18s ease,
        background-color 0.18s ease,
        transform 0.18s ease;
}

.main-nav a:hover,
.main-nav .nav-group > summary:hover,
.main-nav .nav-logout-form button:hover {
    color: var(--primary);
    border-color: #ffdca7;
    background: rgba(255, 189, 96, 0.12);
    text-decoration: none;
    transform: translateY(-1px);
}

.main-nav a.nav-ticket-alert {
    color: var(--danger);
    border-color: rgba(181, 58, 38, 0.3);
    background: rgba(181, 58, 38, 0.08);
}

.main-nav a.nav-ticket-alert:hover {
    color: #8f2f20;
    border-color: rgba(181, 58, 38, 0.45);
    background: rgba(181, 58, 38, 0.14);
}

.main-nav .nav-group {
    position: relative;
}

.main-nav .nav-group > summary {
    list-style: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 7px;
}

.main-nav .nav-group > summary::-webkit-details-marker {
    display: none;
}

.main-nav .nav-group > summary::after {
    content: "\25BE";
    font-size: 0.66rem;
    transform-origin: center;
    transition: transform 0.18s ease;
}

.main-nav .nav-group[open] > summary {
    color: var(--primary);
    border-color: #ffdca7;
    background: rgba(255, 189, 96, 0.16);
}

.main-nav .nav-group[open] > summary::after {
    transform: rotate(180deg);
}

.main-nav .nav-submenu {
    display: none;
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    min-width: 208px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--surface);
    box-shadow: var(--shadow-md);
    padding: 8px;
    z-index: 900;
}

.main-nav .nav-group.nav-group-right > .nav-submenu {
    left: auto;
    right: 0;
}

.main-nav .nav-group[open] > .nav-submenu {
    display: block;
}

.main-nav .nav-submenu a {
    display: block;
    border-radius: 10px;
    padding: 9px 12px;
    font-size: 0.86rem;
    color: var(--text-muted);
    text-decoration: none;
}

.main-nav .nav-submenu a:hover {
    color: var(--primary);
    background: #fff5e2;
}

.page-content {
    padding: 30px 0 56px;
}

h1,
h2,
h3 {
    margin: 0 0 12px;
    font-family: "Sora", "Instrument Sans", sans-serif;
    letter-spacing: -0.01em;
    color: #263139;
}

h1 {
    font-size: clamp(1.35rem, 0.95rem + 1.2vw, 1.95rem);
}

h2 {
    font-size: clamp(1.12rem, 0.95rem + 0.72vw, 1.45rem);
}

h3 {
    font-size: clamp(1rem, 0.9rem + 0.35vw, 1.18rem);
}

p {
    margin: 9px 0;
    line-height: 1.56;
}

strong {
    color: #1e272d;
}

.muted {
    color: var(--text-muted);
}

.panel {
    position: relative;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow-sm);
}

.panel::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    height: 4px;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    background: linear-gradient(90deg, rgba(245, 143, 0, 0.42), rgba(255, 189, 96, 0));
}

.small-panel {
    max-width: 760px;
    margin-inline: auto;
}

.grid {
    display: grid;
    gap: 16px;
}

.cards-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.cards-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.cards-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.metric-card {
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border);
    border-left: 4px solid var(--primary);
    border-radius: var(--radius-md);
    background: linear-gradient(180deg, #ffffff, #fffcf6);
    padding: 16px;
    box-shadow: 0 8px 20px rgba(32, 38, 43, 0.06);
}

.metric-card::after {
    content: "";
    position: absolute;
    inset: auto 0 0 0;
    height: 34px;
    background: linear-gradient(90deg, rgba(245, 143, 0, 0.1), rgba(255, 189, 96, 0));
    pointer-events: none;
}

.metric-card span {
    font-size: 0.84rem;
    color: var(--secondary);
    display: block;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.metric-card strong {
    font-size: clamp(1.12rem, 0.98rem + 0.45vw, 1.35rem);
}

.page-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.table-wrap,
.table-wrap-vertical-scroll {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--surface);
    box-shadow: 0 8px 20px rgba(32, 38, 43, 0.04);
}

.table-wrap {
    overflow-x: auto;
}

.table-wrap-vertical-scroll {
    max-height: 430px;
    overflow-y: auto;
}

.table-wrap-vertical-scroll thead th {
    position: sticky;
    top: 0;
    z-index: 2;
}

table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    font-size: 0.93rem;
}

th,
td {
    padding: 11px 14px;
    border-bottom: 1px solid var(--border);
    text-align: left;
    vertical-align: top;
}

thead th {
    background: #fff6e8;
    color: #334048;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

tbody tr:hover {
    background: #fffaf2;
}

tbody tr:last-child td {
    border-bottom: 0;
}

.form-grid {
    display: grid;
    gap: 10px;
}

.form-grid p {
    margin: 0;
}

.form-grid > .btn {
    justify-self: start;
    width: auto;
}

.form-grid label {
    font-weight: 600;
    color: #334049;
    display: block;
    margin-bottom: 5px;
}

.form-grid .helptext {
    color: var(--text-muted);
    font-size: 0.84rem;
    display: block;
    margin-top: 4px;
}

.system-settings-layout {
    display: grid;
    gap: 16px;
}

.system-settings-layout .panel h2 {
    margin-bottom: 8px;
}

.system-color-list {
    display: grid;
    gap: 12px;
}

.system-color-row {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 12px;
    background: var(--surface-muted);
}

.system-color-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 8px;
}

.system-color-token {
    color: var(--secondary);
    font-size: 0.78rem;
    font-family: "Courier New", monospace;
}

.system-color-controls {
    display: grid;
    grid-template-columns: minmax(58px, 72px) repeat(2, minmax(0, 1fr));
    gap: 8px;
    align-items: center;
}

.system-color-picker {
    width: 100%;
    height: 40px;
    padding: 2px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: #ffffff;
}

.system-color-rgb-input,
.system-color-hex-input {
    font-family: "Courier New", monospace;
}

.logo-gallery {
    display: grid;
    gap: 12px;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
}

.logo-card {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--surface-muted);
    padding: 10px;
    display: grid;
    gap: 8px;
}

.logo-preview {
    border: 1px solid var(--border);
    border-radius: 10px;
    background:
        linear-gradient(45deg, #eef1f4 25%, transparent 25%),
        linear-gradient(-45deg, #eef1f4 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #eef1f4 75%),
        linear-gradient(-45deg, transparent 75%, #eef1f4 75%);
    background-size: 14px 14px;
    background-position:
        0 0,
        0 7px,
        7px -7px,
        -7px 0;
    min-height: 82px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px;
}

.logo-preview img {
    width: 100%;
    max-width: 180px;
    height: 54px;
    object-fit: contain;
}

.logo-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

ul.errorlist {
    list-style: none;
    margin: 6px 0 8px;
    padding: 0;
}

ul.errorlist li {
    color: var(--danger);
    font-size: 0.84rem;
    font-weight: 600;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
select,
textarea,
input[type="file"] {
    width: 100%;
    border: 1px solid #cad3d9;
    border-radius: 11px;
    padding: 11px 12px;
    background: #ffffff;
    color: var(--text);
    transition:
        border-color 0.18s ease,
        box-shadow 0.18s ease,
        background-color 0.18s ease;
}

input[type="file"] {
    padding: 8px 10px;
}

input[type="checkbox"],
input[type="radio"] {
    accent-color: var(--primary);
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="number"]:focus,
select:focus,
textarea:focus,
input[type="file"]:focus {
    outline: none;
    border-color: #f6b451;
    box-shadow: 0 0 0 3px rgba(245, 143, 0, 0.16);
    background: #fffefc;
}

textarea {
    min-height: 115px;
    resize: vertical;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    border-radius: 10px;
    padding: 10px 16px;
    cursor: pointer;
    font-weight: 700;
    font-size: 0.88rem;
    border: 1px solid transparent;
    line-height: 1.2;
    transition:
        transform 0.17s ease,
        box-shadow 0.17s ease,
        background-color 0.17s ease,
        border-color 0.17s ease,
        color 0.17s ease;
}

.btn:hover {
    text-decoration: none;
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0);
}

.btn:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px rgba(245, 143, 0, 0.24);
}

.btn:disabled {
    opacity: 0.65;
    cursor: not-allowed;
    transform: none;
}

.btn-primary {
    background: linear-gradient(180deg, #f59c1d, #e18300);
    border-color: #d47a00;
    color: #ffffff;
    box-shadow: 0 8px 16px rgba(245, 143, 0, 0.22);
}

.btn-primary:hover {
    background: linear-gradient(180deg, #f7a938, #dd7f00);
    color: #ffffff;
}

.btn-outline {
    border-color: #c4cfd6;
    color: #495862;
    background: #ffffff;
}

.btn-outline:hover {
    border-color: #f2c57d;
    background: #fff8ec;
    color: var(--primary);
}

.btn-danger {
    background: #b53a26;
    border-color: #9f3120;
    color: #ffffff;
}

.btn-danger:hover {
    background: #9f3120;
    color: #ffffff;
}

.btn-small {
    padding: 5px 9px;
    font-size: 0.78rem;
    line-height: 1.05;
}

.badge {
    display: inline-block;
    border-radius: 999px;
    padding: 4px 11px;
    font-size: 0.74rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.badge-success {
    background: #ecf9ee;
    color: var(--success);
    border: 1px solid #bde7c5;
}

.badge-warning {
    background: #fff3de;
    color: var(--warning);
    border: 1px solid #ffdb9e;
}

.badge-muted {
    background: #f1f3f5;
    color: var(--secondary);
    border: 1px solid #d8dde1;
}

.progress {
    width: 100%;
    border-radius: 999px;
    background: var(--bg-soft-2);
    border: 1px solid #ffd694;
    overflow: hidden;
    height: 12px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    box-shadow: inset 0 -1px 0 rgba(0, 0, 0, 0.12);
    transition: width 0.15s ease;
}

.video-upload-progress {
    display: grid;
    gap: 8px;
    margin-top: 4px;
}

.video-upload-status {
    margin: 0;
    font-weight: 600;
}

.video-upload-percent {
    margin: 0;
    font-variant-numeric: tabular-nums;
}

.video-upload-cancel-link.is-disabled {
    pointer-events: none;
    opacity: 0.55;
    cursor: not-allowed;
}

.messages {
    margin-bottom: 16px;
}

.message {
    position: relative;
    border: 1px solid var(--border);
    border-left: 4px solid var(--primary);
    padding: 10px 12px;
    margin-bottom: 8px;
    border-radius: var(--radius-sm);
    background: #ffffff;
    box-shadow: 0 8px 20px rgba(32, 38, 43, 0.08);
}

.message.error {
    border-left-color: var(--danger);
}

.message.success {
    border-left-color: var(--success);
}

.message.warning {
    border-left-color: var(--warning);
}

.message.info {
    border-left-color: var(--info);
}

.messages.is-toast-ready {
    position: fixed;
    top: 88px;
    right: 16px;
    width: min(420px, calc(100vw - 24px));
    z-index: 1200;
    margin-bottom: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
    pointer-events: none;
}

.messages.is-toast-ready .message {
    margin-bottom: 0;
    padding-right: 36px;
    pointer-events: auto;
    animation: toast-in 0.22s ease-out;
}

.messages.is-toast-ready .message.is-hiding {
    animation: toast-out 0.2s ease-in forwards;
}

.toast-close {
    position: absolute;
    top: 8px;
    right: 8px;
    border: 0;
    background: transparent;
    color: var(--secondary);
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 700;
    line-height: 1;
}

.toast-close:hover {
    color: var(--text);
}

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

@keyframes toast-out {
    from {
        opacity: 1;
        transform: translateY(0);
    }
    to {
        opacity: 0;
        transform: translateY(-6px);
    }
}

.auth-card {
    max-width: 560px;
    margin: 24px auto 0;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    background: var(--surface);
    box-shadow: var(--shadow-md);
}

.search-bar {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto auto;
    gap: 8px;
    margin-bottom: 14px;
}

.search-bar-users {
    grid-template-columns: minmax(0, 1fr) minmax(200px, 280px) minmax(180px, 240px) auto auto;
}

.search-bar-ticket-filters {
    grid-template-columns: minmax(220px, 280px) minmax(220px, 280px) auto auto;
}

.search-bar-admin-ticket-filters {
    grid-template-columns:
        minmax(260px, 1.3fr)
        minmax(160px, 0.8fr)
        minmax(180px, 1fr)
        minmax(180px, 1fr)
        auto
        auto;
}

.notification-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 10px;
}

.notification-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: #fffdf9;
}

.notification-item:hover {
    text-decoration: none;
    border-color: #f2c57d;
    background: #fff8ec;
}

.ticket-timeline {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 10px;
}

.timeline-item {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 12px;
    background: #ffffff;
}

.timeline-item header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}

.timeline-item p {
    margin: 0;
}

.timeline-item-message.timeline-item-user {
    background: #fffaf1;
    border-color: #ffdca5;
}

.timeline-item-message.timeline-item-staff {
    background: #f6fbff;
    border-color: #cfe1f5;
}

.timeline-item-status {
    background: #f8f9fa;
    border-color: #dde3e8;
}

.ordered-list {
    margin: 0;
    padding-left: 20px;
}

.ordered-list li + li {
    margin-top: 6px;
}

.learning-video {
    width: 100%;
    max-height: 540px;
    background: #000;
    border-radius: var(--radius-md);
    border: 1px solid #20262b;
    box-shadow: 0 16px 34px rgba(32, 38, 43, 0.24);
}

.video-sequence-thumb {
    width: 132px;
    height: 74px;
    border-radius: 9px;
    border: 1px solid #d8e0e5;
    object-fit: cover;
    background: #eef2f5;
    display: block;
}

.video-thumb-link {
    display: inline-block;
    border-radius: 10px;
    line-height: 0;
}

.video-thumb-link:hover .video-sequence-thumb {
    border-color: #f2b24f;
    box-shadow: 0 0 0 3px rgba(245, 143, 0, 0.15);
}

.video-thumb-link:focus-visible {
    outline: none;
}

.video-thumb-link:focus-visible .video-sequence-thumb {
    border-color: #f2b24f;
    box-shadow: 0 0 0 3px rgba(245, 143, 0, 0.28);
}

.video-sequence-table th,
.video-sequence-table td {
    vertical-align: middle;
}

.player-controls {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 12px;
}

.player-quality {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-width: 0;
}

.player-quality-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 600;
}

.player-quality select {
    width: auto;
    min-width: 94px;
    padding: 7px 9px;
    border-radius: 9px;
    font-size: 0.82rem;
}

.player-quality select:disabled {
    background: #f4f7f9;
    color: #6f7d89;
}

.player-quality-value {
    font-size: 0.82rem;
}

.player-timeline {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 10px;
}

.player-timeline input[type="range"] {
    width: 100%;
    margin: 0;
}

.player-timeline .muted {
    min-width: 150px;
    text-align: right;
    font-variant-numeric: tabular-nums;
}

.form-grid ul {
    list-style: none;
    margin: 6px 0 0;
    padding: 0;
}

.assignment-courses-field {
    margin: 0 0 10px;
}

.assignment-categories-field {
    margin: 0 0 10px;
}

.assignment-two-columns {
    display: grid;
    grid-template-columns: minmax(220px, 300px) minmax(0, 1fr);
    gap: 12px;
    align-items: start;
}

.assignment-courses-list {
    max-height: 340px;
    overflow-y: auto;
}

.assignment-category-select {
    min-width: 0;
}

.user-groups-field {
    margin: 0 0 10px;
}

.course-categories-field {
    margin: 0 0 10px;
}

.selection-filter {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 8px;
    margin-bottom: 8px;
}

.selection-empty {
    color: var(--text-muted);
    font-size: 0.85rem;
    padding-top: 8px;
}

.consent-field {
    border: 1px solid var(--border);
    border-radius: 11px;
    padding: 10px 12px;
    background: #fffdf9;
}

.consent-label {
    display: flex;
    align-items: flex-start;
    gap: 9px;
    margin: 0;
    font-weight: 500;
    color: var(--text);
    line-height: 1.45;
}

.consent-label input[type="checkbox"] {
    width: auto;
    margin-top: 2px;
}

.consent-label a {
    font-weight: 700;
}

.assignment-save-btn {
    justify-self: center;
    width: auto;
    min-width: 0;
    padding: 7px 14px;
    font-size: 0.82rem;
}

.selection-list {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 12px 14px;
    background: var(--surface-muted);
}

.selection-list ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.selection-list li + li {
    margin-top: 8px;
}

.selection-list label {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    margin: 0;
    font-weight: 500;
}

.selection-list input[type="checkbox"] {
    width: auto;
    margin-top: 2px;
}

.selection-list-scroll {
    max-height: 320px;
    overflow-y: auto;
}

.assignment-courses-list.selection-list-scroll {
    max-height: 340px;
}

.hidden {
    display: none !important;
}

.inline-form {
    display: inline-flex;
    gap: 8px;
}

.csv-course-modal {
    position: fixed;
    inset: 0;
    z-index: 1400;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 18px;
}

.csv-course-modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(32, 38, 43, 0.56);
    backdrop-filter: blur(2px);
}

.csv-course-modal-dialog {
    position: relative;
    width: min(460px, 100%);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    background: #ffffff;
    padding: 20px;
    box-shadow: 0 20px 44px rgba(32, 38, 43, 0.28);
}

.csv-course-modal-dialog h2 {
    margin-bottom: 6px;
}

.csv-course-modal-dialog p {
    margin-top: 0;
}

.csv-course-modal-dialog label {
    display: block;
    margin-bottom: 6px;
    font-weight: 600;
}

.csv-course-modal-actions {
    margin-top: 16px;
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

.video-current-file {
    display: grid;
    gap: 10px;
}

.video-preview-modal {
    position: fixed;
    inset: 0;
    z-index: 1400;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 18px;
}

.video-preview-modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(32, 38, 43, 0.56);
    backdrop-filter: blur(2px);
}

.video-preview-modal-dialog {
    position: relative;
    width: min(920px, 100%);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    background: #ffffff;
    padding: 20px;
    box-shadow: 0 20px 44px rgba(32, 38, 43, 0.28);
}

.video-preview-modal-dialog h2 {
    margin-bottom: 12px;
}

.video-preview-player {
    width: 100%;
    max-height: min(70vh, 720px);
    border-radius: var(--radius-md);
    background: #000000;
}

.video-preview-modal-actions {
    margin-top: 16px;
    display: flex;
    justify-content: flex-end;
}

.mt-1 {
    margin-top: 10px;
}

.mt-2 {
    margin-top: 18px;
}

.table-wrap,
.table-wrap-vertical-scroll,
.selection-list-scroll {
    scrollbar-width: thin;
    scrollbar-color: #c2ccd3 #f3f6f8;
}

.table-wrap::-webkit-scrollbar,
.table-wrap-vertical-scroll::-webkit-scrollbar,
.selection-list-scroll::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

.table-wrap::-webkit-scrollbar-track,
.table-wrap-vertical-scroll::-webkit-scrollbar-track,
.selection-list-scroll::-webkit-scrollbar-track {
    background: #f3f6f8;
}

.table-wrap::-webkit-scrollbar-thumb,
.table-wrap-vertical-scroll::-webkit-scrollbar-thumb,
.selection-list-scroll::-webkit-scrollbar-thumb {
    background: #c2ccd3;
    border-radius: 999px;
    border: 2px solid #f3f6f8;
}

@media (prefers-reduced-motion: no-preference) {
    .panel,
    .metric-card,
    .auth-card {
        animation: rise-in 0.3s ease-out both;
    }
}

@keyframes rise-in {
    from {
        opacity: 0;
        transform: translateY(5px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 1024px) {
    .cards-4,
    .cards-3 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 860px) {
    .topbar-inner {
        align-items: flex-start;
        flex-direction: column;
        padding: 12px 0;
        gap: 12px;
    }

    .main-nav {
        width: 100%;
    }
}

@media (max-width: 720px) {
    .container {
        width: min(1200px, 94%);
    }

    .brand-logo {
        width: clamp(96px, 45vw, 130px);
        height: 34px;
    }

    .cards-2,
    .cards-3,
    .cards-4 {
        grid-template-columns: 1fr;
    }

    .panel {
        padding: 16px;
        border-radius: 14px;
    }

    .page-head {
        flex-direction: column;
        align-items: flex-start;
    }

    .search-bar {
        grid-template-columns: 1fr;
    }

    .selection-filter {
        grid-template-columns: 1fr;
    }

    .assignment-two-columns {
        grid-template-columns: 1fr;
    }

    .main-nav {
        gap: 8px;
        align-items: stretch;
    }

    .main-nav .nav-group {
        width: 100%;
    }

    .main-nav a,
    .main-nav .nav-group > summary,
    .main-nav .nav-logout-form {
        width: 100%;
        justify-content: space-between;
    }

    .main-nav .nav-logout-form button {
        width: 100%;
        display: inline-flex;
        align-items: center;
        justify-content: space-between;
    }

    .main-nav .nav-submenu {
        position: static;
        min-width: 0;
        margin-top: 6px;
        box-shadow: none;
    }

    .system-color-controls {
        grid-template-columns: 1fr;
    }

    .logo-gallery {
        grid-template-columns: 1fr;
    }

    .player-timeline {
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
    }

    .player-quality {
        width: 100%;
    }

    .player-timeline .muted {
        min-width: 0;
        text-align: left;
    }

    .messages.is-toast-ready {
        top: 78px;
        right: 10px;
    }
}