:root {
    --ink: #2d233f;
    --muted: #6c6780;
    --paper: #f3eef8;
    --surface: rgba(255, 255, 255, 0.9);
    --panel: #f5f0fb;
    --line: rgba(82, 60, 120, 0.22);
    --purple: #7b63d8;
    --purple-dark: #6246c4;
    --purple-soft: #efe7ff;
    --teal: #6f58d8;
    --teal-dark: #513bb5;
    --coral: #e77b5f;
    --shadow: 0 20px 42px rgba(82, 65, 124, 0.12);
    --shadow-soft: 0 10px 22px rgba(80, 65, 124, 0.08);
    --radius: 22px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    overflow-x: hidden;
    font-family: "Segoe UI", "Trebuchet MS", sans-serif;
    background: linear-gradient(180deg, #f2ecf9 0%, #eee6fb 100%);
    color: var(--ink);
    line-height: 1.55;
}

a {
    transition: all 0.2s ease;
}

img,
video {
    max-width: 100%;
}

.app-shell {
    display: flex;
    min-height: 100vh;
    padding: 18px 12px 18px 130px;
    gap: 18px;
}

.side-rail {
    position: fixed;
    top: 18px;
    bottom: 18px;
    left: 12px;
    z-index: 30;
    width: 100px;
    height: calc(100vh - 36px);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    padding: 16px 10px 18px;
    background: rgba(245, 239, 255, 0.9);
    border: 1px solid rgba(98, 70, 196, 0.08);
    border-radius: 24px;
    box-shadow: var(--shadow-soft);
}

.brand-badge {
    width: 54px;
    height: 54px;
    display: grid;
    place-items: center;
    border-radius: 18px;
    background: linear-gradient(135deg, #8a6ef3, #6a52d4);
    color: white;
    font-size: 1.5rem;
    font-weight: 800;
    box-shadow: 0 14px 26px rgba(107, 82, 212, 0.25);
}

.rail-button {
    display: grid;
    place-items: center;
    width: 58px;
    height: 58px;
    border: 0;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.65);
    color: var(--ink);
    font-size: 1.6rem;
    cursor: pointer;
    text-decoration: none;
    box-shadow: inset 0 0 0 1px rgba(82, 60, 120, 0.05);
}

.rail-button.active {
    background: linear-gradient(135deg, #8d70eb, #6c57ce);
    color: white;
    box-shadow: 0 12px 18px rgba(98, 70, 196, 0.22);
}

.workspace-panel {
    flex: 1;
    min-width: 0;
    background: rgba(243, 238, 250, 0.75);
    border: 1px solid rgba(98, 70, 196, 0.08);
    border-radius: 30px;
    box-shadow: var(--shadow-soft);
    overflow: hidden;
}

.topbar {
    position: fixed;
    top: 0;
    right: 12px;
    left: 130px;
    z-index: 20;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 28px;
    padding: 14px 28px;
    background: rgba(247, 242, 255, 0.88);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(98, 70, 196, 0.08);
    color: var(--ink);
}

.brand-group,
.nav-links {
    display: flex;
    align-items: center;
}

.brand-group {
    gap: 12px;
}

.logo {
    color: var(--ink);
    font-size: 1.05rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    text-decoration: none;
}

.role-label {
    display: block;
    color: var(--muted);
    font-size: 10px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.top-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.icon-button,
.notification-button {
    position: relative;
    display: grid;
    place-items: center;
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(98, 70, 196, 0.08);
    color: var(--ink);
    text-decoration: none;
    box-shadow: var(--shadow-soft);
}

.notification-button b {
    position: absolute;
    top: -5px;
    right: -4px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: linear-gradient(135deg, #ff8a75, #ca4b42);
    color: white;
    font: bold 10px Arial, sans-serif;
    text-align: center;
    line-height: 16px;
}

.nav-links {
    gap: 20px;
    font-family: Arial, sans-serif;
    font-size: 14px;
}

.nav-links a {
    color: var(--ink);
    text-decoration: none;
}

.nav-links a:hover {
    color: var(--purple);
}

.profile-link {
    width: 42px;
    height: 42px;
    display: grid;
    place-items: center;
    overflow: hidden;
    border: 2px solid rgba(107, 82, 212, 0.2);
    border-radius: 50%;
    background: linear-gradient(135deg, #d8ccff, #f3ecff);
    text-decoration: none;
    box-shadow: 0 10px 20px rgba(107, 82, 212, 0.15);
}

.profile-link img,
.profile-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.logout-form {
    display: inline;
}

.nav-button {
    padding: 0;
    background: transparent;
    color: var(--ink);
    font: inherit;
}

.container {
    width: min(1180px, calc(100% - 54px));
    margin: 0 auto;
    padding: 92px 8px 32px;
}

.hero {
    padding: 64px 12px 56px;
    max-width: 820px;
}

.learning-hero {
    padding: 34px 12px 24px;
}

.learning-hero h1 {
    font-size: clamp(34px, 5vw, 58px);
}

.hero h1,
.page-heading h1 {
    margin: 8px 0 12px;
    font-size: clamp(38px, 6vw, 68px);
    line-height: 1.02;
    letter-spacing: -0.06em;
}

.hero p:not(.eyebrow) {
    max-width: 560px;
    color: var(--muted);
    font-size: 1.18rem;
}


.eyebrow {
    margin: 0;
    color: var(--coral);
    font: 800 11px/1.2 Arial, sans-serif;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.page-heading {
    margin-bottom: 28px;
}

.page-heading h1 {
    font-size: 46px;
}

.section-title {
    margin: 38px 0 12px;
}

.btn,
button {
    position: relative;
    overflow: hidden;
    display: inline-block;
    padding: 12px 18px;
    background: linear-gradient(135deg, var(--teal), var(--teal-dark));
    color: white;
    border: 1px solid var(--teal);
    border-radius: 12px;
    font: 700 14px/1.2 Arial, sans-serif;
    text-decoration: none;
    cursor: pointer;
    transition: transform 0.18s ease, box-shadow 0.18s ease, filter 0.18s ease;
    box-shadow: 0 10px 18px rgba(15, 125, 132, 0.18);
}

.nav-search {
    display: flex;
    flex: 1;
    max-width: 520px;
    min-width: 180px;
}

.nav-search input {
    width: 100%;
    min-width: 0;
    padding: 10px 14px;
    border: 1px solid rgba(98, 70, 196, 0.16);
    border-radius: 12px 0 0 12px;
    background: rgba(255, 255, 255, 0.8);
    color: var(--ink);
    font: inherit;
}

.nav-search button {
    border: 0;
    border-radius: 0 12px 12px 0;
    padding: 0 13px;
    background: var(--purple);
    color: white;
    cursor: pointer;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.button-ripple {
    position: absolute;
    z-index: 0;
    display: block;
    border-radius: 50%;
    pointer-events: none;
    background: rgba(255, 255, 255, 0.42);
    transform: scale(0);
    animation: button-ripple 0.52s ease-out forwards;
}

.btn > *,
button > * {
    position: relative;
    z-index: 1;
}

@keyframes button-ripple {
    to {
        opacity: 0;
        transform: scale(2.8);
    }
}

@keyframes button-press {
    50% { transform: translateY(1px) scale(0.96); }
    100% { transform: translateY(0) scale(1); }
}

.btn.is-pressed,
button.is-pressed,
.rail-button.is-pressed,
.icon-button.is-pressed,
.notification-button.is-pressed,
.theme-button.is-pressed {
    animation: button-press 0.24s ease-out;
}

.btn:hover,
button:hover {
    background: linear-gradient(135deg, var(--teal-dark), var(--teal));
    transform: translateY(-1px);
    box-shadow: 0 14px 24px rgba(15, 125, 132, 0.2);
}

.nav-button:hover {
    background: transparent;
    transform: none;
    box-shadow: none;
}

.form-box,
.dashboard-card,
.post-card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.form-box {
    max-width: 500px;
    margin: 30px auto;
    padding: 34px;
}

.form-box h1,
.form-box h2 {
    margin-top: 0;
}

.form-box label {
    display: block;
    margin-top: 17px;
    font: bold 12px Arial, sans-serif;
    color: var(--muted);
}

.form-box input,
.form-box select,
.form-box textarea {
    width: 100%;
    padding: 12px 13px;
    margin-top: 7px;
    border: 1px solid #cfc8bb;
    border-radius: 4px;
    background: #fffefa;
    color: var(--ink);
    font: 15px Georgia, serif;
}

.form-box input:focus,
.form-box select:focus,
.form-box textarea:focus {
    outline: 2px solid #9bd8d0;
    border-color: var(--teal);
}

.form-box button {
    width: 100%;
    margin-top: 24px;
}

.checkbox-label {
    display: flex !important;
    align-items: center;
    gap: 8px;
}

.checkbox-label input {
    width: auto;
    margin: 0;
}

.alert {
    padding: 12px 15px;
    margin-bottom: 16px;
    border-left: 4px solid;
    border-radius: 4px;
    font-family: Arial, sans-serif;
    font-size: 14px;
}

.success {
    background: #e4f4ed;
    border-color: var(--teal);
}

.danger {
    background: #fbe8e3;
    border-color: var(--coral);
}

.warning {
    background: #fff2ce;
    border-color: #d59c2a;
}

.dashboard-card {
    padding: 25px;
}

.welcome-card {
    border-top: 4px solid var(--teal);
}

.welcome-card h2 {
    margin: 0 0 6px;
    font-size: 28px;
}

.muted,
.post-meta {
    color: var(--muted);
}

.dashboard-section {
    margin-top: 38px;
}

.history-list {
    display: flex;
    gap: 14px;
    overflow-x: auto;
    padding: 4px 2px 14px;
    scroll-snap-type: x mandatory;
    scrollbar-color: var(--teal) var(--line);
}

.history-item {
    flex: 0 0 min(360px, calc(100vw - 60px));
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
    scroll-snap-align: start;
}

.history-item h3,
.history-item p {
    overflow-wrap: anywhere;
}

.history-item h3 {
    margin: 0 0 4px;
}

.history-item time {
    color: var(--muted);
    font: 13px Arial, sans-serif;
    white-space: nowrap;
}

.history-item form {
    margin: 0;
}

.history-detail-link {
    margin-top: 12px;
}

.history-page-heading .btn {
    margin-top: 8px;
}

.history-list-full {
    flex-direction: column;
    overflow-x: visible;
}

.history-list-full .history-item {
    flex-basis: auto;
}

.cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
    margin: 25px 0;
}

.cards div {
    padding: 24px 15px;
    background: #e7f0eb;
    border: 1px solid #d4e4dd;
    border-radius: 6px;
    text-align: center;
    font-weight: bold;
}

.materials {
    display: grid;
    gap: 18px;
    width: 100%;
    max-width: none;
    margin: 10px 0 30px;
}

.material-grid {
    display: grid;
    width: 100%;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.trainer-results {
    margin: 8px 0 38px;
}

.trainer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 14px;
}

.trainer-card {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: var(--shadow);
    color: var(--ink);
    text-decoration: none;
}

.trainer-card:hover {
    border-color: #8bcfc4;
    transform: translateY(-1px);
}

.trainer-card h3,
.trainer-card p {
    margin: 0;
}

.trainer-card p {
    color: var(--muted);
    font: 12px Arial, sans-serif;
}

.trainer-card span {
    display: inline-block;
    margin-top: 5px;
    color: var(--teal);
    font: bold 12px Arial, sans-serif;
}

.trainer-avatar {
    width: 52px;
    height: 52px;
    flex: 0 0 52px;
    display: grid;
    place-items: center;
    overflow: hidden;
    border-radius: 50%;
    background: #e0ece8;
    font-size: 27px;
}

.trainer-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.section-heading {
    display: flex;
    justify-content: space-between;
    align-items: end;
    margin: 14px 0 2px;
}

.section-heading h2 {
    margin: 5px 0;
    font-size: 30px;
}

.section-count {
    color: var(--muted);
    font: 13px Arial, sans-serif;
}

.content-tabs {
    display: flex;
    gap: 7px;
    margin-left: auto;
    font: 13px Arial, sans-serif;
}

.content-tabs a {
    padding: 8px 11px;
    color: var(--muted);
    border: 1px solid var(--line);
    border-radius: 4px;
    text-decoration: none;
}

.content-tabs a.active,
.content-tabs a:hover {
    background: var(--teal);
    border-color: var(--teal);
    color: white;
}

.material-tag {
    margin: 0 0 7px;
    color: var(--coral);
    font: bold 11px Arial, sans-serif;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.material-card {
    display: flex;
    min-width: 0;
    min-height: 286px;
    flex-direction: column;
    overflow: hidden;
    padding: 0;
}

.material-card-visual {
    display: grid;
    min-height: 116px;
    place-items: center;
    color: rgba(45, 35, 63, 0.7);
    font-size: 2.4rem;
}

.material-card-visual img {
    width: 100%;
    height: 116px;
    object-fit: cover;
}

.note-visual {
    background: #e9e3f0;
}

.video-visual {
    background: #ded8ee;
}

.material-card-body {
    display: flex;
    flex: 1;
    flex-direction: column;
    padding: 16px 18px 18px;
}

.material-card h2 {
    margin: 0 0 5px;
    overflow: hidden;
    font-size: 19px;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.material-card .post-meta {
    margin: 0;
    font-size: 12px;
}

.material-description {
    display: -webkit-box;
    margin: 8px 0 0;
    overflow: hidden;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
    color: var(--muted);
    font-size: 13px;
}

.material-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: auto;
    padding-top: 14px;
}

.material-card .btn {
    padding: 9px 13px;
    font-size: 12px;
}

.material-card form {
    margin: 0;
}

.material-card form button {
    padding: 9px 13px;
    font-size: 12px;
}

.solution-video {
    width: 100%;
    max-height: 420px;
    margin: 12px 18px 18px;
    border-radius: 5px;
    background: #10201f;
}

.material-card form,
.post-card form {
    display: inline-block;
    margin-top: 8px;
}

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

.danger-button:hover {
    background: #b9513d;
}

table {
    width: 100%;
    background: var(--surface);
    border-collapse: collapse;
}

.table-wrap {
    overflow-x: auto;
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: var(--shadow);
}

th,
td {
    padding: 15px 16px;
    border-bottom: 1px solid var(--line);
    text-align: left;
    white-space: nowrap;
}

th {
    background: #e7f0eb;
    color: var(--ink);
    font: bold 11px Arial, sans-serif;
    letter-spacing: .7px;
    text-transform: uppercase;
}

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

td form {
    display: inline-block;
    margin: 2px 4px 2px 0;
}

td button {
    padding: 8px 11px;
    font-size: 12px;
}

.profile-preview {
    width: 120px;
    height: 120px;
    margin: 0 auto 20px;
    display: grid;
    place-items: center;
    overflow: hidden;
    border-radius: 50%;
    background: #e0ece8;
    font-size: 64px;
}

.profile-stat {
    text-align: center;
    margin: 12px 0 22px;
}

.profile-header-card {
    display: flex;
    align-items: center;
    gap: 22px;
    margin-bottom: 20px;
    padding: 20px;
    border-radius: 12px;
    background: #e8f4f3;
}

.profile-header-card .profile-preview {
    flex: 0 0 96px;
    width: 96px;
    height: 96px;
    margin: 0;
    font-size: 48px;
}

.profile-header-card h1,
.profile-header-card .profile-stat {
    margin: 4px 0;
    text-align: left;
}

.profile-fields-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.field-card {
    margin: 0 !important;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: var(--paper);
}

.field-card input {
    margin-top: 9px !important;
    background: var(--surface);
}

.setting-card {
    margin: 12px 0;
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: 11px;
    background: var(--paper);
}

.setting-card:last-child {
    margin-bottom: 0;
}

.courses-heading-card {
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: var(--surface);
    box-shadow: var(--shadow);
}

.feed-container {
    max-width: 700px;
    margin: 30px auto;
}

.post-card {
    padding: 25px;
    margin-bottom: 20px;
}

.post-card h3 {
    margin-top: 0;
    margin-bottom: 8px;
}

.post-meta {
    margin-bottom: 15px;
    font: 13px Arial, sans-serif;
}

.post-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: -2px 0 14px;
}

.post-tags .material-tag {
    margin: 0;
    padding: 4px 8px;
    border-radius: 12px;
    background: #e7f0eb;
    color: var(--teal-dark);
    letter-spacing: .4px;
}

.post-card img {
    width: 100%;
    max-height: 450px;
    object-fit: cover;
    border-radius: 5px;
    margin-top: 15px;
}

@media (max-width: 768px) {
    nav {
        align-items: flex-start;
        flex-wrap: wrap;
    }

    .nav-links {
        width: 100%;
        justify-content: flex-start;
        flex-wrap: wrap;
        gap: 12px 18px;
    }

    .container {
        width: min(calc(100% - 30px), 680px);
        margin-top: 28px;
    }

    .hero {
        padding: 42px 0 30px;
    }

    .hero h1,
    .page-heading h1 {
        font-size: 42px;
    }

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

    .form-box {
        padding: 25px 20px;
    }
}

@media (max-width: 460px) {
    nav {
        padding: 14px 15px;
    }

    .brand-group {
        min-width: 0;
    }

    .logo {
        max-width: calc(100vw - 70px);
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .nav-links {
        gap: 10px 14px;
        font-size: 13px;
    }

    .container {
        width: calc(100% - 24px);
        margin-top: 22px;
    }

    .dashboard-card,
    .material-card {
        padding: 18px;
    }

    .page-heading h1 {
        font-size: 36px;
    }

    .cards {
        grid-template-columns: 1fr;
    }

    .section-heading {
        align-items: start;
        flex-direction: column;
        gap: 12px;
    }

    .content-tabs {
        margin-left: 0;
        flex-wrap: wrap;
    }

    .search-form {
        width: 100%;
    }

    .search-form input {
        min-width: 0;
    }

    .history-item {
        flex-basis: calc(100vw - 48px);
        gap: 9px;
    }

    .history-item time {
        white-space: normal;
    }

    .history-item form,
    .history-item form button {
        width: 100%;
    }

    .logo {
        font-size: 19px;
    }
}

.app-main { max-width: 1100px; margin: auto; }
.dashboard-intro { display: flex; justify-content: space-between; align-items: center; margin: 28px 0 26px; }
.dashboard-intro h1 { margin: 5px 0; font-size: clamp(28px, 4vw, 42px); line-height: 1.1; }
.avatar-action { width: 58px; height: 58px; display: grid; place-items: center; overflow: hidden; border-radius: 50%; background: #c8e5e4; color: var(--ink); font-size: 23px; text-decoration: none; }
.avatar-action img { width: 100%; height: 100%; object-fit: cover; }
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 18px; }
.metric-card { padding: 20px; border-radius: 12px; background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow); }
.metric-card span, .metric-card small, .action-card small, .course-card small, .activity-row small, .schedule-row small { display: block; color: var(--muted); font-size: 12px; }
.metric-card strong { display: block; margin: 8px 0 2px; font-size: 34px; }
.accent-cyan { border-top: 4px solid #65c6c8; }.accent-orange { border-top: 4px solid #edaa62; }.accent-lilac { border-top: 4px solid #b9a9d8; }
.dashboard-grid { display: grid; grid-template-columns: 1.45fr 1fr; gap: 18px; }
.content-panel { padding: 22px; margin-bottom: 18px; border: 1px solid var(--line); border-radius: 13px; background: var(--surface); box-shadow: var(--shadow); }
.content-panel h2 { margin: 4px 0 18px; font-size: 21px; }.section-heading { display: flex; align-items: center; justify-content: space-between; gap: 16px; }.section-heading a, .text-link, .form-footer a { color: var(--teal); font-weight: bold; text-decoration: none; font-size: 13px; }
.liked-content-panel { margin-top: 18px; }.liked-material-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }.liked-material-card { display: flex; align-items: center; gap: 11px; min-width: 0; padding: 10px; border: 1px solid var(--line); border-radius: 10px; color: var(--ink); text-decoration: none; }.liked-material-card:hover { border-color: var(--teal); transform: translateY(-1px); }.liked-material-card strong, .liked-material-card small { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }.liked-material-card small { margin-top: 3px; color: var(--muted); font-size: 11px; }.liked-material-thumb { display: grid; flex: 0 0 58px; width: 58px; height: 58px; place-items: center; overflow: hidden; border-radius: 7px; color: rgba(45, 35, 63, 0.65); }.liked-material-thumb img { width: 100%; height: 100%; object-fit: cover; }
.schedule-manager { max-width: 900px; margin-left: auto; margin-right: auto; }.schedule-form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 16px; }.schedule-form label { display: block; color: var(--muted); font-size: 12px; font-weight: 700; }.schedule-form input, .schedule-form textarea { display: block; width: 100%; margin-top: 7px; padding: 11px 12px; border: 1px solid var(--line); border-radius: 7px; background: var(--surface); color: var(--ink); font: inherit; }.schedule-form label:last-of-type { grid-column: 1 / -1; }.schedule-form button { grid-column: 1 / -1; justify-self: start; }.managed-schedule-row { display: flex; align-items: center; gap: 14px; padding: 14px 0; border-bottom: 1px solid var(--line); }.managed-schedule-row:last-child { border-bottom: 0; }.schedule-date { display: grid; flex: 0 0 46px; place-items: center; padding: 6px; border-radius: 8px; background: var(--purple-soft); color: var(--purple-dark); }.schedule-date strong { font-size: 20px; line-height: 1; }.schedule-date small { font-size: 11px; }.managed-schedule-copy { flex: 1; min-width: 0; }.managed-schedule-copy strong, .managed-schedule-copy small { display: block; }.managed-schedule-copy small, .managed-schedule-copy p { color: var(--muted); font-size: 12px; }.managed-schedule-copy p { margin: 4px 0 0; }.schedule-actions { display: flex; gap: 7px; }.schedule-actions form { margin: 0; }.schedule-actions .btn, .schedule-actions button { padding: 8px 11px; font-size: 12px; }.notification-row { padding: 11px 0; border-bottom: 1px solid var(--line); }.notification-row:last-child { border-bottom: 0; }.notification-row strong, .notification-row small { display: block; }.notification-row small { margin-top: 3px; color: var(--muted); }.notification-row.unread { border-left: 3px solid var(--coral); padding-left: 10px; }
.course-list, .action-grid { display: grid; gap: 11px; }.course-card { display: grid; grid-template-columns: 42px 1fr auto; align-items: center; gap: 12px; padding: 15px; border-radius: 10px; color: var(--ink); text-decoration: none; }.course-blue { background: #d9f0f1; }.course-yellow { background: #fff0cd; }.course-icon { display: grid; place-items: center; width: 36px; height: 36px; border-radius: 9px; background: rgba(255,255,255,.7); font-size: 20px; }.course-card strong, .action-card strong { font-size: 14px; }.course-card b { font-size: 20px; }.activity-row, .schedule-row { display: flex; align-items: center; gap: 12px; padding: 13px 0; border-bottom: 1px solid var(--line); }.activity-row:last-child, .schedule-row:last-child { border-bottom: 0; }.activity-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--coral); }.action-grid { grid-template-columns: repeat(3, 1fr); }.action-card { padding: 18px; border: 1px solid var(--line); border-radius: 10px; color: var(--ink); text-decoration: none; }.action-card span { display: block; margin-bottom: 22px; color: var(--teal); font-size: 27px; }.schedule-row b { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 8px; background: #e6f3f2; color: var(--teal); }.notice-panel { display: flex; justify-content: space-between; align-items: center; gap: 20px; }.notice-panel h2 { margin-bottom: 4px; }.big-number { font-size: 52px; color: var(--teal); }
.form-page { min-height: 72vh; display: grid; place-items: center; }.auth-box, .setup-box { width: min(100%, 520px); }.auth-box h1, .setup-box h1 { margin: 5px 0; font-size: 34px; }.form-footer { margin: 20px 0 0; text-align: center; color: var(--muted); font-size: 13px; }.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
.settings-box { width: min(100%, 620px); }.setting-row { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 22px 0; border-bottom: 1px solid var(--line); }.setting-row strong, .setting-row small { display: block; }.setting-row small { margin-top: 4px; color: var(--muted); font-size: 12px; }.theme-switch { display: flex; gap: 6px; padding: 4px; border-radius: 10px; background: var(--paper); }.theme-button { margin: 0; padding: 8px 12px; border: 0; border-radius: 7px; background: transparent; color: var(--muted); font-size: 12px; }.theme-button.selected { background: var(--surface); color: var(--ink); box-shadow: var(--shadow); }.logout-row { border-bottom: 0; }.logout-button { background: #bd4c50; border-color: #bd4c50; }.dark-theme {
    --ink: #e9f6f7;
    --muted: #abc2c5;
    --paper: #122a2d;
    --surface: rgba(24, 42, 46, 0.9);
    --line: rgba(162, 210, 214, 0.28);
    --shadow: 0 18px 40px rgba(0, 0, 0, 0.26);
    --shadow-soft: 0 8px 24px rgba(0, 0, 0, 0.18);
}

.dark-theme .topbar {
    background: rgba(18, 39, 43, 0.9);
}

.dark-theme .nav-search,
.dark-theme .icon-button,
.dark-theme .notification-button,
.dark-theme .theme-switch,
.dark-theme .field-card,
.dark-theme .setting-card,
.dark-theme .action-card,
.dark-theme .course-card,
.dark-theme .material-card,
.dark-theme .dashboard-card,
.dark-theme .content-panel,
.dark-theme .metric-card,
.dark-theme .courses-heading-card,
.dark-theme .post-card,
.dark-theme .form-box,
.dark-theme .trainer-card {
    background: rgba(30, 50, 54, 0.9);
}

.dark-theme .nav-search,
.dark-theme .icon-button,
.dark-theme .notification-button,
.dark-theme .form-box input,
.dark-theme .form-box select,
.dark-theme .form-box textarea,
.dark-theme .search-form input {
    background: rgba(16, 29, 32, 0.8);
    color: var(--ink);
    border-color: var(--line);
}

.dark-theme .profile-link,
.dark-theme .avatar-action,
.dark-theme .trainer-avatar,
.dark-theme .profile-preview {
    background: linear-gradient(135deg, rgba(21, 62, 69, 0.9), rgba(33, 75, 83, 0.8));
}

.dark-theme th {
    background: rgba(39, 63, 68, 0.95);
}

/* Guest / Logged out full-width layouts */
.app-shell.is-guest {
    padding: 16px 20px 32px;
    display: block;
    max-width: 1200px;
    margin: 0 auto;
}

.app-shell.is-guest .side-rail {
    display: none;
}

.app-shell.is-guest .workspace-panel {
    border-radius: 20px;
    overflow: hidden;
}

.app-shell.is-guest .topbar {
    left: 20px;
    right: 20px;
    max-width: 1160px;
    margin: 0 auto;
}

.app-shell.is-guest .container {
    padding-top: 84px;
}

/* ==========================================================================
   Multi-Device Responsive System (Laptops, Tablets, Phones)
   ========================================================================== */

/* --- Medium to Large Tablets (max-width: 1024px) --- */
@media (max-width: 1024px) {
    .app-shell {
        padding-left: 96px;
        padding-right: 14px;
    }

    .side-rail {
        left: 10px;
        width: 74px;
    }

    .topbar {
        left: 96px;
        right: 14px;
        padding: 12px 18px;
    }

    .container {
        width: 100%;
        max-width: 100%;
        padding: 84px 8px 32px;
    }

    .dashboard-grid {
        grid-template-columns: 1fr;
    }

    .playlist-container {
        grid-template-columns: 1fr;
    }

    .playlist-sidebar {
        position: static;
        max-height: none;
    }

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

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

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

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

/* --- Mobile Devices & Small Tablets (max-width: 768px) --- */
@media (max-width: 768px) {
    /* Transform left rail into a native mobile bottom navigation bar */
    .app-shell {
        display: block;
        padding: 0 0 calc(72px + env(safe-area-inset-bottom, 0px)) 0;
        width: 100%;
        min-width: 0;
    }

    .side-rail {
        position: fixed;
        bottom: 0;
        top: auto;
        left: 0;
        right: 0;
        width: 100%;
        height: 60px;
        min-height: 60px;
        max-height: 60px;
        flex-direction: row;
        justify-content: space-around;
        align-items: center;
        gap: 0;
        padding: 6px 12px calc(6px + env(safe-area-inset-bottom, 0px));
        border-radius: 20px 20px 0 0;
        border: 1px solid var(--line);
        border-bottom: none;
        background: rgba(247, 242, 255, 0.96);
        backdrop-filter: blur(16px);
        box-shadow: 0 -4px 22px rgba(82, 65, 124, 0.14);
        z-index: 1000;
    }

    .side-rail .brand-badge {
        display: none;
    }

    .rail-button {
        width: 44px;
        height: 44px;
        border-radius: 12px;
        font-size: 1.35rem;
    }

    .workspace-panel {
        border-radius: 0;
        border: none;
        box-shadow: none;
        background: transparent;
        overflow: visible;
        width: 100%;
    }

    .topbar {
        position: sticky;
        top: 0;
        left: 0;
        right: 0;
        width: 100%;
        padding: 10px 14px;
        border-radius: 0;
        z-index: 90;
        backdrop-filter: blur(16px);
        gap: 12px;
    }

    .app-shell.is-guest .topbar {
        position: sticky;
        left: 0;
        right: 0;
        top: 0;
        border-radius: 0;
    }

    .container {
        width: 100%;
        max-width: 100%;
        padding: 12px 14px 28px;
        margin: 0;
    }

    .app-main {
        width: 100%;
    }

    /* Dashboard adjustments */
    .dashboard-intro {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
        margin: 14px 0 20px;
    }

    .dashboard-intro h1 {
        font-size: clamp(24px, 6vw, 32px);
    }

    .avatar-action {
        width: 46px;
        height: 46px;
        font-size: 18px;
    }

    .stats-grid {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .metric-card {
        padding: 14px 16px;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    .metric-card strong {
        margin: 0;
        font-size: 28px;
    }

    .dashboard-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .explore-course-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .material-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .action-grid {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .liked-material-grid {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .content-panel {
        padding: 18px 14px;
        border-radius: 14px;
    }

    .section-heading {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .section-heading h2 {
        font-size: 22px;
    }

    /* Forms & Account pages */
    .schedule-form {
        grid-template-columns: 1fr;
    }

    .schedule-form label,
    .schedule-form label:last-of-type,
    .schedule-form button,
    .schedule-form div {
        grid-column: 1 / -1;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

    .form-box,
    .auth-box,
    .setup-box,
    .settings-box {
        width: 100%;
        margin: 14px auto;
        padding: 22px 16px;
        border-radius: 14px;
    }

    .auth-box h1,
    .setup-box h1 {
        font-size: 26px;
    }

    .setting-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .theme-switch {
        width: 100%;
        justify-content: space-around;
    }

    .managed-schedule-row {
        align-items: flex-start;
        flex-wrap: wrap;
    }

    .schedule-actions {
        width: 100%;
        margin-left: 0;
        margin-top: 8px;
    }

    /* Course Detail & Playlist */
    .course-detail-header {
        padding: 18px 14px;
        gap: 16px;
        border-radius: 16px;
    }

    .course-header-top {
        flex-direction: column;
        align-items: stretch;
        gap: 14px;
    }

    .course-title-group h1 {
        font-size: clamp(22px, 5.5vw, 30px);
    }

    .course-subtitle {
        font-size: 13.5px;
    }

    .course-progress-box {
        min-width: 0;
        width: 100%;
    }

    .course-header-actions {
        width: 100%;
    }

    .course-header-actions form,
    .course-header-actions button {
        width: 100%;
    }

    /* Swipable horizontal tabs */
    .course-nav-tabs {
        display: flex;
        gap: 8px;
        overflow-x: auto;
        flex-wrap: nowrap;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        padding: 4px 2px 8px;
        margin: 0 -4px;
    }

    .course-nav-tabs::-webkit-scrollbar {
        display: none;
    }

    .course-tab-btn {
        flex-shrink: 0;
        white-space: nowrap;
        font-size: 13px;
        padding: 9px 14px;
    }

    .playlist-container {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .playlist-stage {
        gap: 14px;
    }

    .player-wrapper {
        border-radius: 14px;
    }

    .lecture-details-card {
        padding: 16px 14px;
    }

    .lecture-header-row {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
    }

    .lecture-completion-action,
    .completion-btn {
        width: 100%;
        justify-content: center;
    }

    .lecture-nav-controls {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
    }

    .lecture-nav-controls button,
    .lecture-nav-controls a {
        width: 100%;
        justify-content: center;
        text-align: center;
    }

    .playlist-sidebar {
        padding: 14px;
        border-radius: 14px;
        max-height: 420px;
    }

    .playlist-items-list {
        max-height: 300px;
    }

    /* Course Quizzes */
    .quizzes-grid {
        grid-template-columns: 1fr !important;
        gap: 14px !important;
    }

    .quiz-card {
        padding: 18px 14px !important;
    }

    .take-quiz-card {
        padding: 18px 14px;
    }

    .quiz-choice-option {
        padding: 12px 14px;
        gap: 10px;
    }

    .quiz-submit-bar {
        flex-direction: column !important;
        align-items: stretch !important;
        gap: 14px !important;
        padding: 16px 14px !important;
        text-align: center !important;
    }

    .quiz-submit-bar div {
        display: flex;
        flex-direction: column;
        gap: 8px;
    }

    .quiz-submit-bar button,
    .quiz-submit-bar a {
        width: 100%;
        text-align: center;
    }

    .quiz-result-scorecard {
        flex-direction: column !important;
        align-items: center !important;
        text-align: center !important;
        gap: 16px !important;
        padding: 18px 14px !important;
    }

    .quiz-result-scorecard > div:first-child {
        flex-direction: column !important;
        align-items: center !important;
        text-align: center !important;
    }

    .quiz-result-scorecard > div:last-child {
        width: 100%;
        flex-direction: column !important;
    }

    .quiz-result-scorecard a {
        width: 100%;
        text-align: center;
    }

    .quiz-option-review-pill {
        flex-direction: column !important;
        align-items: flex-start !important;
        gap: 6px !important;
    }

    .quiz-question-admin-card {
        padding: 14px 12px;
    }

    .quiz-options-preview-grid {
        grid-template-columns: 1fr;
    }

    /* Profile and other tables */
    .profile-header-card {
        align-items: center;
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }

    .profile-header-card h1,
    .profile-header-card .profile-stat {
        text-align: center;
    }

    .profile-fields-grid {
        grid-template-columns: 1fr;
    }

    .courses-heading-card {
        padding: 15px;
    }
}

/* --- Compact Phones (max-width: 480px) --- */
@media (max-width: 480px) {
    .topbar {
        flex-wrap: wrap;
        padding: 8px 12px;
    }

    .brand-group {
        flex: 1;
        min-width: 0;
    }

    .logo {
        font-size: 15px;
        max-width: 150px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .role-label {
        font-size: 9px;
    }

    .nav-search {
        order: 3;
        width: 100%;
        flex: 1 0 100%;
        max-width: 100%;
        margin-top: 6px;
    }

    .top-actions {
        order: 2;
    }

    .container {
        padding: 10px 10px 24px;
    }

    .content-panel {
        padding: 14px 12px;
    }

    .metric-card {
        padding: 12px 14px;
    }

    .metric-card strong {
        font-size: 24px;
    }

    .course-tab-btn {
        padding: 7px 11px;
        font-size: 12px;
    }

    .table-wrap {
        border-radius: 8px;
    }

    th, td {
        padding: 10px 12px;
        font-size: 12px;
    }
}


.empty-card {
    grid-column: 1 / -1;
}

.admin-message-panel {
    margin-bottom: 20px;
}

.admin-message-form {
    display: grid;
    grid-template-columns: 1fr 2fr auto;
    gap: 10px;
}

.admin-message-form input,
.admin-message-form textarea {
    width: 100%;
    padding: 11px 12px;
    border: 1px solid var(--line);
    border-radius: 7px;
    background: var(--surface);
    color: var(--ink);
    font: inherit;
}

.admin-message-form textarea {
    resize: vertical;
}

.explore-course-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

.explore-course-card {
    display: flex;
    min-height: 170px;
    flex-direction: column;
    padding: 18px;
    border: 2px solid var(--line);
    border-radius: 12px;
    background: linear-gradient(145deg, var(--surface), var(--purple-soft));
    color: var(--ink);
    text-decoration: none;
    transition: transform 0.18s ease, border-color 0.18s ease;
}

.explore-course-card:hover {
    border-color: var(--purple);
    transform: translateY(-3px);
}

.explore-course-card h3 {
    margin: 8px 0 6px;
    font-size: 18px;
}

.explore-course-card p {
    display: -webkit-box;
    margin: 0;
    overflow: hidden;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
    color: var(--muted);
    font-size: 13px;
}

.explore-course-card small {
    margin-top: auto;
    padding-top: 14px;
    color: var(--teal-dark);
    font-weight: 700;
}

.explore-course-card form {
    margin: 14px 0 0;
}

.explore-course-card button,
.enrolled-status {
    width: 100%;
    padding: 9px 12px;
    font-size: 12px;
    text-align: center;
}

.enrolled-status {
    display: block;
    margin-top: 14px;
    border: 2px solid rgba(98, 70, 196, 0.35);
    border-radius: 9px;
    background: rgba(123, 99, 216, 0.12);
    color: var(--purple-dark);
    font-weight: 800;
}

.dark-theme .enrolled-status {
    border-color: rgba(164, 182, 225, 0.3);
    background: rgba(126, 115, 232, 0.16);
    color: #dcd8ff;
}

.explore-course-label {
    color: var(--coral);
    font: 800 10px/1 Arial, sans-serif;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.static-card:hover {
    transform: none;
}

@media (max-width: 800px) {
    .explore-course-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 560px) {
    .explore-course-grid {
        grid-template-columns: 1fr;
    }
}

/* Consistent, more visible UI outlines. */
.side-rail,
.workspace-panel,
.icon-button,
.notification-button,
.form-box,
.dashboard-card,
.post-card,
.trainer-card,
.field-card,
.setting-card,
.courses-heading-card,
.metric-card,
.content-panel,
.liked-material-card,
.action-card,
.table-wrap,
.content-tabs a,
.form-box input,
.form-box select,
.form-box textarea,
.schedule-form input,
.schedule-form textarea,
.admin-message-form input,
.admin-message-form textarea {
    border-width: 2px;
}

@media (prefers-reduced-motion: reduce) {
    .btn,
    button,
    .rail-button,
    .icon-button,
    .notification-button,
    .theme-button {
        transition: none;
        animation: none;
    }
}

/* Dark-theme palette: prevents light surfaces from leaking through. */
.dark-theme {
    --paper: #101b29;
    --panel: #142235;
    --surface: rgba(22, 37, 56, 0.96);
    --purple-soft: #243452;
    --teal: #7e73e8;
    --teal-dark: #6255cf;
    background: linear-gradient(180deg, #0b1421 0%, #111d2d 100%);
}

.dark-theme .workspace-panel {
    background: rgba(15, 27, 43, 0.92);
    border-color: rgba(164, 182, 225, 0.22);
}

.dark-theme .side-rail {
    background: rgba(18, 32, 50, 0.96);
    border-color: rgba(164, 182, 225, 0.2);
}

.dark-theme .rail-button,
.dark-theme .icon-button,
.dark-theme .notification-button {
    background: rgba(33, 51, 75, 0.95);
    border-color: rgba(164, 182, 225, 0.2);
    color: var(--ink);
}

.dark-theme .rail-button.active {
    background: linear-gradient(135deg, #8879f2, #6253cb);
}

.dark-theme .form-box input,
.dark-theme .form-box select,
.dark-theme .form-box textarea,
.dark-theme .schedule-form input,
.dark-theme .schedule-form textarea,
.dark-theme .admin-message-form input,
.dark-theme .admin-message-form textarea {
    background: #0e1a2a;
    border-color: rgba(164, 182, 225, 0.28);
    color: var(--ink);
}

.dark-theme .cards div,
.dark-theme th,
.dark-theme .profile-header-card,
.dark-theme .post-tags .material-tag,
.dark-theme .course-blue,
.dark-theme .course-yellow,
.dark-theme .note-visual,
.dark-theme .video-visual,
.dark-theme .trainer-avatar,
.dark-theme .profile-preview,
.dark-theme .avatar-action,
.dark-theme .schedule-row b {
    background: #1c3048;
    color: var(--ink);
}

.dark-theme .course-icon {
    background: rgba(109, 132, 163, 0.25);
}

.dark-theme .alert.success {
    background: #173c38;
    color: #d5f5ea;
}

.dark-theme .alert.danger {
    background: #482c35;
    color: #ffdedb;
}

.dark-theme .alert.warning {
    background: #4b3b21;
    color: #fff0c4;
}

@media (max-width: 800px) {
    .admin-message-form {
        grid-template-columns: 1fr;
    }
}

/* ==========================================================================
   Course Detail, Playlist Player & Tabs
   ========================================================================== */
.course-detail-page {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.course-back-nav {
    margin-bottom: -4px;
}

.course-detail-header {
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding: 24px;
    border-radius: var(--radius);
}

.course-header-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 24px;
    flex-wrap: wrap;
}

.course-title-group h1 {
    margin: 8px 0 6px;
    font-size: 28px;
    letter-spacing: -0.02em;
}

.course-subtitle {
    margin: 0 0 12px;
    color: var(--muted);
    font-size: 15px;
    max-width: 720px;
}

.course-meta-row {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--muted);
    flex-wrap: wrap;
}

.course-meta-row a {
    color: var(--teal-dark);
    text-decoration: none;
}

.course-meta-divider {
    color: var(--line);
    font-weight: bold;
}

.course-progress-box {
    min-width: 220px;
    background: var(--surface);
    border: 2px solid var(--line);
    padding: 14px 18px;
    border-radius: 16px;
    box-shadow: var(--shadow-soft);
}

.progress-label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
    font-size: 13px;
}

.progress-title {
    font-weight: 600;
    color: var(--muted);
}

.progress-track {
    height: 8px;
    background: rgba(120, 100, 160, 0.15);
    border-radius: 999px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--teal), #10b981);
    border-radius: 999px;
    transition: width 0.3s ease;
}

.progress-counter {
    display: block;
    margin-top: 6px;
    font-size: 11px;
    color: var(--muted);
    text-align: right;
}

/* Course Tabs */
.course-nav-tabs {
    display: flex;
    gap: 10px;
    border-top: 1px solid var(--line);
    padding-top: 16px;
    flex-wrap: wrap;
}

.course-tab-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border: 2px solid var(--line);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.6);
    color: var(--ink);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.course-tab-btn:hover {
    border-color: var(--purple);
    background: var(--surface);
}

.course-tab-btn.active {
    background: linear-gradient(135deg, var(--purple), var(--purple-dark));
    color: white;
    border-color: transparent;
    box-shadow: 0 4px 14px rgba(98, 70, 196, 0.25);
}

.tab-badge {
    background: rgba(0, 0, 0, 0.08);
    padding: 2px 7px;
    border-radius: 999px;
    font-size: 11px;
}

.course-tab-btn.active .tab-badge {
    background: rgba(255, 255, 255, 0.25);
    color: white;
}

.course-tab-pane {
    display: none;
}

.course-tab-pane.active {
    display: block;
}

/* ==========================================================================
   Playlist Layout (Stage & Sidebar)
   ========================================================================== */
.playlist-container {
    display: grid;
    grid-template-columns: 1fr 360px;
    gap: 20px;
    align-items: start;
}

.playlist-stage {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.player-wrapper {
    width: 100%;
    background: #000;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 2px solid var(--line);
}

.video-container {
    position: relative;
    width: 100%;
    padding-top: 56.25%; /* 16:9 Aspect Ratio */
    background: #06090e;
}

.video-container video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    background: #000;
}

.document-preview-box {
    background: var(--surface);
    padding: 30px 24px;
    text-align: center;
}

.document-card {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.document-icon {
    font-size: 54px;
    color: var(--purple);
    margin-bottom: 12px;
}

.document-card h3 {
    margin: 0 0 6px;
    font-size: 20px;
}

.doc-actions {
    margin-top: 18px;
}

/* Lecture Details Card */
.lecture-details-card {
    padding: 20px 24px;
}

.lecture-header-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 18px;
}

.lecture-type-badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}

.badge-video {
    background: rgba(231, 123, 95, 0.15);
    color: var(--coral);
}

.badge-note {
    background: rgba(111, 88, 216, 0.15);
    color: var(--teal);
}

.lecture-details-card h2 {
    margin: 0 0 8px;
    font-size: 22px;
}

.lecture-description {
    margin: 0;
    color: var(--muted);
    font-size: 14px;
    line-height: 1.6;
}

.completion-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border: 2px solid var(--line);
    border-radius: 12px;
    background: var(--surface);
    color: var(--ink);
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
}

.completion-btn .check-icon {
    font-size: 14px;
}

.completion-btn:hover {
    border-color: #10b981;
    color: #10b981;
}

.completion-btn.completed {
    background: #10b981;
    border-color: #10b981;
    color: white;
}

.lecture-nav-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding-top: 16px;
    border-top: 1px solid var(--line);
    flex-wrap: wrap;
}

.btn-outline {
    background: transparent;
    color: var(--ink);
    border: 2px solid var(--line);
}

.btn-outline:hover {
    border-color: var(--purple);
    color: var(--purple);
}

/* Playlist Sidebar (YouTube / Udemy style) */
.playlist-sidebar {
    padding: 18px;
    display: flex;
    flex-direction: column;
    max-height: 800px;
    position: sticky;
    top: 24px;
}

.playlist-sidebar-header {
    margin-bottom: 14px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--line);
}

.playlist-sidebar-header h3 {
    margin: 0;
    font-size: 17px;
}

.playlist-filter input {
    width: 100%;
    margin-top: 10px;
    padding: 8px 12px;
    border-radius: 9px;
    border: 1px solid var(--line);
    background: var(--surface);
    color: var(--ink);
    font-size: 12px;
}

.playlist-items-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    overflow-y: auto;
    padding-right: 4px;
    max-height: 640px;
}

.playlist-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 12px;
    border: 2px solid transparent;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: all 0.18s ease;
    user-select: none;
}

.playlist-item:hover {
    background: var(--surface);
    border-color: rgba(98, 70, 196, 0.2);
    transform: translateX(2px);
}

.playlist-item.active {
    background: var(--surface);
    border-color: var(--purple);
    box-shadow: var(--shadow-soft);
}

.playlist-index {
    font-size: 12px;
    font-weight: 700;
    color: var(--muted);
    min-width: 18px;
    text-align: center;
}

.playlist-item.active .playlist-index {
    color: var(--purple);
}

.playlist-item-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: grid;
    place-items: center;
    font-size: 13px;
    flex-shrink: 0;
}

.playlist-item-icon.video-icon {
    background: rgba(231, 123, 95, 0.15);
    color: var(--coral);
}

.playlist-item-icon.note-icon {
    background: rgba(111, 88, 216, 0.15);
    color: var(--teal);
}

.playlist-item-body {
    flex: 1;
    min-width: 0;
}

.playlist-item-body h4 {
    margin: 0 0 3px;
    font-size: 13px;
    line-height: 1.35;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.playlist-item-meta {
    display: flex;
    gap: 5px;
    font-size: 11px;
    color: var(--muted);
}

.status-check {
    width: 22px;
    height: 22px;
    border-radius: 999px;
    border: 2px solid var(--line);
    display: grid;
    place-items: center;
    font-size: 11px;
    color: transparent;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.status-check.is-completed {
    border-color: #10b981;
    background: #10b981;
    color: white;
}

/* Dashboard Course Card Additions */
.course-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
    padding-top: 14px;
}

.course-progress-pill {
    font-size: 11px;
    font-weight: 700;
    color: #10b981;
    background: rgba(16, 185, 129, 0.12);
    border: 1px solid rgba(16, 185, 129, 0.3);
    padding: 3px 8px;
    border-radius: 999px;
}

/* Explore Tabs Button */
.course-explore-tab-btn {
    padding: 9px 18px;
    border: 2px solid var(--line);
    border-radius: 12px;
    background: var(--surface);
    color: var(--ink);
    font-weight: 700;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.course-explore-tab-btn:hover {
    border-color: var(--purple);
}

.course-explore-tab-btn.active {
    background: linear-gradient(135deg, var(--purple), var(--purple-dark));
    color: white;
    border-color: transparent;
}

/* Responsive */
@media (max-width: 960px) {
    .playlist-container {
        grid-template-columns: 1fr;
    }
    .playlist-sidebar {
        position: static;
        max-height: none;
    }
}

/* ==========================================================================
   Dark Theme for Course Detail & Playlist
   ========================================================================== */
.dark-theme .course-progress-box,
.dark-theme .document-preview-box,
.dark-theme .lecture-details-card,
.dark-theme .playlist-sidebar {
    background: #122033;
    border-color: rgba(164, 182, 225, 0.22);
}

.dark-theme .course-tab-btn {
    background: rgba(22, 37, 56, 0.96);
    border-color: rgba(164, 182, 225, 0.22);
    color: #e2e8f0;
}

.dark-theme .course-tab-btn.active {
    background: linear-gradient(135deg, #8879f2, #6253cb);
    color: white;
}

.dark-theme .playlist-item {
    background: rgba(22, 37, 56, 0.6);
}

.dark-theme .playlist-item:hover,
.dark-theme .playlist-item.active {
    background: #192d47;
    border-color: #7e73e8;
}

.dark-theme .playlist-filter input {
    background: #0e1a2a;
    border-color: rgba(164, 182, 225, 0.28);
    color: #e2e8f0;
}

.dark-theme .completion-btn {
    background: #192d47;
    border-color: rgba(164, 182, 225, 0.22);
    color: #e2e8f0;
}

.dark-theme .completion-btn.completed {
    background: #10b981;
    border-color: #10b981;
    color: white;
}

.dark-theme .course-explore-tab-btn {
    background: #142235;
    border-color: rgba(164, 182, 225, 0.22);
    color: #e2e8f0;
}

.dark-theme .course-explore-tab-btn.active {
    background: linear-gradient(135deg, #8879f2, #6253cb);
    color: white;
}

/* Like Button Styles */
.like-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 14px;
    border-radius: 10px;
    border: 2px solid var(--line);
    background: var(--surface);
    color: var(--ink);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.like-btn:hover {
    border-color: #ef4444;
    color: #ef4444;
    transform: translateY(-1px);
}

.like-btn.liked {
    background: rgba(239, 68, 68, 0.12);
    border-color: #ef4444;
    color: #ef4444;
    font-weight: 700;
}

.like-heart {
    font-size: 15px;
    line-height: 1;
}

.dark-theme .like-btn {
    background: #142235;
    border-color: rgba(164, 182, 225, 0.22);
    color: #e2e8f0;
}

.dark-theme .like-btn:hover {
    border-color: #f87171;
    color: #f87171;
}

.dark-theme .like-btn.liked {
    background: rgba(239, 68, 68, 0.2);
    border-color: #f87171;
    color: #fca5a5;
}

/* ==========================================================================
   Quiz & Assessment Modern Design System
   ========================================================================== */

/* Quiz Container & Breadcrumbs */
.take-quiz-main {
    max-width: 820px;
    margin: 0 auto;
    padding-bottom: 60px;
}

.course-breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin-bottom: 20px;
    font-size: 13.5px;
    font-weight: 600;
}

.course-breadcrumb a {
    color: var(--teal);
    text-decoration: none;
}

.course-breadcrumb a:hover {
    color: var(--purple-dark);
    text-decoration: underline;
}

.breadcrumb-separator {
    color: var(--line);
    font-size: 14px;
}

.breadcrumb-current {
    color: var(--muted);
}

/* Quiz Hero / Header Banner */
.quiz-header-banner {
    padding: 26px 28px;
    border-radius: 18px;
    margin-bottom: 24px;
    background: var(--surface);
    border: 1.5px solid var(--line);
    box-shadow: var(--shadow-soft);
}

.quiz-header-top-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 20px;
    flex-wrap: wrap;
}

.quiz-header-info {
    flex: 1;
    min-width: 0;
}

.quiz-badge-group {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
    flex-wrap: wrap;
}

.quiz-assessment-tag {
    background: rgba(123, 99, 216, 0.12);
    color: var(--purple);
    font-weight: 800;
    font-size: 11px;
    padding: 4px 10px;
    border-radius: 999px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.quiz-course-tag {
    color: var(--muted);
    font-size: 13px;
    font-weight: 600;
}

.quiz-main-title {
    margin: 0 0 8px;
    font-size: clamp(22px, 5vw, 30px);
    font-weight: 800;
    line-height: 1.25;
    color: var(--ink);
}

.quiz-main-desc {
    margin: 0 0 16px;
    font-size: 14.5px;
    line-height: 1.55;
    color: var(--muted);
}

.quiz-meta-pills {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.quiz-meta-pill {
    font-size: 12px;
    font-weight: 600;
    background: rgba(0, 0, 0, 0.04);
    color: var(--ink);
    padding: 5px 12px;
    border-radius: 8px;
    border: 1px solid var(--line);
}

.quiz-back-btn {
    font-size: 13px;
    padding: 8px 16px;
    white-space: nowrap;
    border-radius: 10px;
}

/* Question Taking Card */
.take-quiz-card {
    background: var(--surface);
    border: 1.5px solid var(--line);
    border-radius: 16px;
    padding: 26px 28px;
    margin-bottom: 22px;
    box-shadow: var(--shadow-soft);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.take-quiz-card:hover {
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.06);
}

.quiz-question-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 14px;
}

.quiz-question-step-badge {
    font-size: 11.5px;
    font-weight: 800;
    color: var(--purple);
    letter-spacing: 0.8px;
    text-transform: uppercase;
}

.quiz-points-tag {
    font-size: 12px;
    font-weight: 600;
    color: var(--muted);
    background: rgba(0, 0, 0, 0.04);
    padding: 3px 9px;
    border-radius: 6px;
}

.quiz-question-prompt {
    margin: 0 0 20px;
    font-size: 18px;
    font-weight: 700;
    line-height: 1.45;
    color: var(--ink);
}

/* Choice Group & Radio Items */
.quiz-choice-group {
    display: flex;
    flex-direction: column;
    gap: 11px;
}

.quiz-choice-option {
    position: relative;
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 18px;
    border-radius: 12px;
    border: 2px solid var(--line);
    background: var(--surface);
    color: var(--ink);
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    user-select: none;
}

.quiz-choice-option input[type="radio"] {
    width: 18px;
    height: 18px;
    accent-color: var(--purple, #7b63d8);
    cursor: pointer;
    flex-shrink: 0;
}

.opt-label-badge {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 13px;
    background: rgba(123, 99, 216, 0.1);
    color: var(--purple);
    border: 1px solid rgba(123, 99, 216, 0.2);
    transition: all 0.2s ease;
}

.opt-label-text {
    font-size: 15px;
    font-weight: 500;
    color: var(--ink);
    flex: 1;
    line-height: 1.4;
}

/* Option Hover & Active Checked States */
.quiz-choice-option:hover {
    border-color: var(--purple, #7b63d8);
    background: rgba(123, 99, 216, 0.04);
    transform: translateX(2px);
}

.quiz-choice-option:has(input[type="radio"]:checked) {
    border-color: var(--purple, #7b63d8);
    background: rgba(123, 99, 216, 0.09);
    box-shadow: 0 0 0 1px var(--purple, #7b63d8), 0 4px 14px rgba(123, 99, 216, 0.12);
}

.quiz-choice-option:has(input[type="radio"]:checked) .opt-label-badge {
    background: var(--purple, #7b63d8);
    color: #ffffff;
    border-color: var(--purple, #7b63d8);
}

.quiz-choice-option:has(input[type="radio"]:checked) .opt-label-text {
    font-weight: 700;
    color: var(--ink);
}

/* Submit Action Bar */
.quiz-submit-bar {
    position: sticky;
    bottom: 18px;
    z-index: 15;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    padding: 18px 24px;
    border-radius: 16px;
    border: 1.5px solid var(--line);
    background: var(--surface);
    backdrop-filter: blur(16px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
    margin-top: 10px;
}

.quiz-submit-hint {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13.5px;
    color: var(--muted);
}

.hint-icon {
    font-size: 18px;
}

.quiz-submit-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.quiz-submit-btn {
    padding: 12px 28px;
    font-size: 15px;
    font-weight: 700;
    border-radius: 12px;
    background: linear-gradient(135deg, #10b981, #059669);
    color: #ffffff;
    border: 1px solid #10b981;
    box-shadow: 0 6px 18px rgba(16, 185, 129, 0.28);
    cursor: pointer;
}

.quiz-submit-btn:hover {
    background: linear-gradient(135deg, #059669, #047857);
    transform: translateY(-1px);
}

/* Scorecard & Results Banner */
.quiz-result-scorecard {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
    padding: 22px 24px;
    border-radius: 16px;
    margin-top: 22px;
    border: 1.5px solid;
}

.quiz-result-scorecard.score-high {
    background: rgba(16, 185, 129, 0.08);
    border-color: rgba(16, 185, 129, 0.3);
}

.quiz-result-scorecard.score-mid {
    background: rgba(59, 130, 246, 0.08);
    border-color: rgba(59, 130, 246, 0.3);
}

.quiz-result-scorecard.score-low {
    background: rgba(239, 68, 68, 0.08);
    border-color: rgba(239, 68, 68, 0.3);
}

.scorecard-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.scorecard-icon {
    font-size: 44px;
    line-height: 1;
}

.scorecard-title {
    margin: 0 0 4px;
    font-size: 20px;
    font-weight: 800;
    color: var(--ink);
}

.scorecard-desc {
    margin: 0;
    font-size: 14px;
    color: var(--muted);
}

.scorecard-actions {
    display: flex;
    gap: 10px;
    align-items: center;
}

/* Review Mode */
.review-section-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 18px;
    flex-wrap: wrap;
    gap: 10px;
}

.quiz-question-review-card {
    padding: 24px 26px;
    border-radius: 16px;
    margin-bottom: 20px;
    border: 1.5px solid var(--line);
    background: var(--surface);
    box-shadow: var(--shadow-soft);
}

.status-result-badge {
    font-size: 12px;
    font-weight: 800;
    padding: 4px 12px;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.badge-correct {
    background: rgba(16, 185, 129, 0.12);
    color: #10b981;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-incorrect {
    background: rgba(239, 68, 68, 0.12);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.review-options-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.quiz-option-review-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 13px 18px;
    border-radius: 12px;
    border: 1.5px solid;
    transition: all 0.15s ease;
}

.quiz-option-review-item.opt-state-correct {
    border-color: #10b981;
    background: rgba(16, 185, 129, 0.08);
}

.quiz-option-review-item.opt-state-incorrect {
    border-color: #ef4444;
    background: rgba(239, 68, 68, 0.06);
}

.quiz-option-review-item.opt-state-neutral {
    border-color: var(--line);
    background: transparent;
    opacity: 0.85;
}

.opt-review-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.opt-review-badge {
    width: 30px;
    height: 30px;
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 12.5px;
    background: rgba(0, 0, 0, 0.06);
    color: var(--ink);
}

.opt-review-badge.badge-success {
    background: #10b981;
    color: #ffffff;
}

.opt-review-badge.badge-danger {
    background: #ef4444;
    color: #ffffff;
}

.opt-review-text {
    font-size: 15px;
    font-weight: 600;
    color: var(--ink);
}

.review-pill-tag {
    font-size: 12px;
    font-weight: 700;
    padding: 3px 9px;
    border-radius: 6px;
}

.review-pill-tag.tag-success {
    color: #10b981;
    background: rgba(16, 185, 129, 0.12);
}

.review-pill-tag.tag-danger {
    color: #ef4444;
    background: rgba(239, 68, 68, 0.12);
}

.quiz-review-bottom-nav {
    display: flex;
    justify-content: center;
    gap: 14px;
    margin-top: 24px;
}

/* Trainer Quiz Management Admin Styles */
.quiz-question-admin-card {
    padding: 18px 20px;
    border-radius: 12px;
    border: 1.5px solid var(--line);
    background: var(--surface);
    margin-bottom: 16px;
    transition: box-shadow 0.15s ease;
}

.quiz-question-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 14px;
}

.quiz-question-num {
    background: var(--purple, #2563eb);
    color: #ffffff;
    font-weight: 700;
    font-size: 11px;
    padding: 3px 8px;
    border-radius: 6px;
    letter-spacing: 0.5px;
}

.quiz-options-preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 10px;
}

.quiz-option-pill {
    padding: 10px 14px;
    border-radius: 8px;
    border: 1.5px solid var(--line);
    background: var(--surface);
    color: var(--ink);
    font-size: 13.5px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.quiz-option-pill.correct {
    border-color: #10b981;
    background: rgba(16, 185, 129, 0.08);
    font-weight: 600;
}

.correct-tag {
    color: #10b981;
    font-size: 11px;
    font-weight: 700;
}

.quiz-card {
    background: var(--surface);
    border: 1.5px solid var(--line);
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.quiz-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.06);
    border-color: var(--purple, #2563eb);
}

/* ==========================================================================
   Dark Theme Overrides for Quiz Components
   ========================================================================== */
.dark-theme .quiz-card,
.dark-theme .take-quiz-card,
.dark-theme .quiz-question-admin-card,
.dark-theme .quiz-question-review-card,
.dark-theme .quiz-header-banner,
.dark-theme .quiz-submit-bar {
    background: #101c2e;
    border-color: rgba(164, 182, 225, 0.22);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.dark-theme .quiz-question-prompt {
    color: #f8fafc;
}

.dark-theme .quiz-main-title {
    color: #f8fafc;
}

.dark-theme .quiz-meta-pill {
    background: #142235;
    border-color: rgba(164, 182, 225, 0.2);
    color: #e2e8f0;
}

.dark-theme .quiz-choice-option {
    background: #142235;
    border-color: rgba(164, 182, 225, 0.2);
    color: #f1f5f9;
}

.dark-theme .quiz-choice-option:hover {
    border-color: #8879f2;
    background: rgba(136, 121, 242, 0.1);
}

.dark-theme .quiz-choice-option:has(input[type="radio"]:checked) {
    border-color: #8879f2;
    background: rgba(136, 121, 242, 0.2);
    box-shadow: 0 0 0 1px #8879f2, 0 4px 16px rgba(136, 121, 242, 0.25);
}

.dark-theme .opt-label-badge {
    background: rgba(136, 121, 242, 0.2);
    color: #a594f9;
    border-color: rgba(136, 121, 242, 0.35);
}

.dark-theme .quiz-choice-option:has(input[type="radio"]:checked) .opt-label-badge {
    background: #8879f2;
    color: #ffffff;
    border-color: #8879f2;
}

.dark-theme .opt-label-text {
    color: #f1f5f9;
}

.dark-theme .quiz-question-step-badge {
    color: #a594f9;
}

.dark-theme .quiz-points-tag {
    background: rgba(255, 255, 255, 0.07);
    color: #cbd5e1;
}

.dark-theme .quiz-option-pill {
    background: #142235;
    border-color: rgba(164, 182, 225, 0.22);
    color: #f1f5f9;
}

.dark-theme .quiz-option-pill.correct {
    border-color: #34d399;
    background: rgba(16, 185, 129, 0.15);
}

.dark-theme .quiz-option-review-item.opt-state-neutral {
    background: #142235;
    border-color: rgba(164, 182, 225, 0.18);
}

.dark-theme .opt-review-text {
    color: #f1f5f9;
}

.dark-theme .opt-review-badge {
    background: rgba(255, 255, 255, 0.1);
    color: #f1f5f9;
}

.dark-theme .scorecard-title {
    color: #f8fafc;
}

.dark-theme .app-shell.is-guest .workspace-panel {
    background: transparent;
}

@media (max-width: 768px) {
    .dark-theme .side-rail {
        background: rgba(16, 28, 44, 0.97);
        border-color: rgba(164, 182, 225, 0.2);
        box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.5);
    }

    .dark-theme .rail-button {
        background: rgba(255, 255, 255, 0.08);
        color: #e2e8f0;
    }

    .dark-theme .rail-button.active {
        background: linear-gradient(135deg, #8879f2, #6253cb);
        color: white;
    }

    .dark-theme .topbar {
        background: rgba(16, 28, 44, 0.95);
        border-color: rgba(164, 182, 225, 0.18);
    }
}

/* ==========================================================================
   Trainee Help Desk Styles
   ========================================================================== */
.helpdesk-main {
    max-width: 1200px;
    margin: 0 auto;
}

.helpdesk-header-banner {
    margin-bottom: 24px;
    background: linear-gradient(135deg, rgba(136, 121, 242, 0.08), rgba(98, 83, 203, 0.04));
    border: 1.5px solid var(--line);
    border-radius: 18px;
    padding: 24px 28px;
}

.helpdesk-badge-group {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

.helpdesk-tag {
    font-size: 11.5px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    background: linear-gradient(135deg, #8879f2, #6253cb);
    color: #ffffff;
    padding: 3px 10px;
    border-radius: 999px;
}

.helpdesk-status-pill {
    font-size: 11.5px;
    font-weight: 600;
    color: #10b981;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.25);
    padding: 3px 10px;
    border-radius: 999px;
}

.helpdesk-main-title {
    margin: 0 0 8px;
    font-size: 26px;
    font-weight: 800;
    color: var(--ink);
    letter-spacing: -0.02em;
}

.helpdesk-main-desc {
    margin: 0;
    font-size: 14.5px;
    color: var(--muted);
    max-width: 760px;
    line-height: 1.55;
}

.helpdesk-layout-grid {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 24px;
    align-items: start;
}

.helpdesk-action-card {
    background: var(--surface);
    border: 1.5px solid var(--line);
    border-radius: 18px;
    padding: 24px;
    margin-bottom: 20px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.03);
}

.helpdesk-direct-email-card {
    border-left: 4px solid var(--purple, #8879f2);
    background: linear-gradient(180deg, rgba(136, 121, 242, 0.04), var(--surface));
}

.helpdesk-card-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 18px;
}

.helpdesk-icon-bubble {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: rgba(136, 121, 242, 0.12);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    flex-shrink: 0;
}

.helpdesk-card-title {
    margin: 0;
    font-size: 18px;
    font-weight: 700;
    color: var(--ink);
}

.helpdesk-card-sub {
    margin: 2px 0 0;
    font-size: 13px;
    color: var(--muted);
}

.helpdesk-admin-info-box {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 14px;
    background: var(--bg-card, rgba(240, 243, 250, 0.6));
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 14px 18px;
    margin-bottom: 12px;
}

.admin-email-meta {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.admin-label {
    font-size: 11px;
    font-weight: 700;
    color: var(--muted);
    letter-spacing: 0.06em;
}

.admin-email-display {
    font-family: var(--font-mono, monospace);
    font-size: 15px;
    font-weight: 700;
    color: var(--purple, #6253cb);
}

.helpdesk-card-hint {
    margin: 0;
    font-size: 12.5px;
    color: var(--muted);
}

.helpdesk-trainee-meta-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 18px;
}

.trainee-meta-pill {
    font-size: 12px;
    font-weight: 600;
    background: rgba(0, 0, 0, 0.04);
    border: 1px solid var(--line);
    color: var(--ink);
    padding: 4px 10px;
    border-radius: 999px;
}

.helpdesk-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.helpdesk-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 6px;
}

.helpdesk-select,
.helpdesk-input,
.helpdesk-textarea {
    width: 100%;
    padding: 10px 14px;
    font-size: 14px;
    border-radius: 10px;
    border: 1.5px solid var(--line);
    background: var(--surface);
    color: var(--ink);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
    box-sizing: border-box;
}

.helpdesk-select:focus,
.helpdesk-input:focus,
.helpdesk-textarea:focus {
    border-color: var(--purple, #8879f2);
    box-shadow: 0 0 0 3px rgba(136, 121, 242, 0.15);
}

.helpdesk-textarea {
    resize: vertical;
    min-height: 120px;
    font-family: inherit;
}

.helpdesk-submit-btn {
    width: 100%;
    padding: 12px 20px;
    font-size: 15px;
    font-weight: 700;
}

.helpdesk-history-panel {
    background: var(--surface);
    border: 1.5px solid var(--line);
    border-radius: 18px;
    padding: 22px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.03);
}

.helpdesk-history-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--line);
}

.helpdesk-count-badge {
    background: rgba(136, 121, 242, 0.15);
    color: var(--purple, #6253cb);
    font-weight: 700;
    font-size: 12px;
    padding: 2px 8px;
    border-radius: 999px;
}

.helpdesk-inquiries-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.helpdesk-inquiry-item {
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: var(--bg-card, rgba(240, 243, 250, 0.4));
    transition: transform 0.15s ease, border-color 0.15s ease;
}

.helpdesk-inquiry-item:hover {
    border-color: var(--purple, #8879f2);
    transform: translateY(-1px);
}

.inquiry-item-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 6px;
}

.inquiry-cat-tag {
    font-size: 11px;
    font-weight: 700;
    color: var(--purple, #6253cb);
    text-transform: uppercase;
}

.inquiry-status-badge {
    font-size: 10.5px;
    font-weight: 700;
    padding: 2px 7px;
    border-radius: 999px;
    text-transform: uppercase;
}

.status-open {
    background: rgba(245, 158, 11, 0.12);
    color: #b45309;
}

.status-resolved {
    background: rgba(16, 185, 129, 0.12);
    color: #047857;
}

.inquiry-item-subject {
    margin: 0 0 6px;
    font-size: 14px;
    font-weight: 700;
    color: var(--ink);
}

.inquiry-item-preview {
    margin: 0 0 8px;
    font-size: 12.5px;
    color: var(--muted);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.45;
}

.inquiry-item-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 11px;
    color: var(--muted);
}

.helpdesk-empty-state {
    text-align: center;
    padding: 36px 16px;
}

.helpdesk-empty-state .empty-icon {
    font-size: 36px;
    margin-bottom: 8px;
}

.helpdesk-empty-state h3 {
    margin: 0 0 4px;
    font-size: 15px;
    color: var(--ink);
}

.helpdesk-banner-panel {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 16px;
    background: linear-gradient(135deg, rgba(136, 121, 242, 0.08), rgba(98, 83, 203, 0.04));
    border: 1.5px solid var(--line);
}

/* Dark Theme Overrides for Help Desk */
.dark-theme .helpdesk-header-banner,
.dark-theme .helpdesk-action-card,
.dark-theme .helpdesk-history-panel,
.dark-theme .helpdesk-banner-panel {
    background: #101c2e;
    border-color: rgba(164, 182, 225, 0.22);
}

.dark-theme .helpdesk-direct-email-card {
    background: linear-gradient(180deg, rgba(136, 121, 242, 0.08), #101c2e);
    border-left-color: #8879f2;
}

.dark-theme .helpdesk-main-title,
.dark-theme .helpdesk-card-title,
.dark-theme .helpdesk-label,
.dark-theme .inquiry-item-subject {
    color: #f8fafc;
}

.dark-theme .helpdesk-admin-info-box {
    background: #142235;
    border-color: rgba(164, 182, 225, 0.2);
}

.dark-theme .admin-email-display {
    color: #a594f9;
}

.dark-theme .trainee-meta-pill {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(164, 182, 225, 0.2);
    color: #e2e8f0;
}

.dark-theme .helpdesk-select,
.dark-theme .helpdesk-input,
.dark-theme .helpdesk-textarea {
    background: #142235;
    border-color: rgba(164, 182, 225, 0.22);
    color: #f1f5f9;
}

.dark-theme .helpdesk-inquiry-item {
    background: #142235;
    border-color: rgba(164, 182, 225, 0.18);
}

.dark-theme .inquiry-cat-tag {
    color: #a594f9;
}

.dark-theme .status-open {
    background: rgba(245, 158, 11, 0.18);
    color: #fbbf24;
}

.dark-theme .status-resolved {
    background: rgba(16, 185, 129, 0.18);
    color: #34d399;
}

@media (max-width: 1024px) {
    .helpdesk-layout-grid {
        grid-template-columns: 1fr;
    }
}