:root {
    --bg: #f3f0f7;
    --surface: #ffffff;
    --ink: #17111f;
    --muted: #6f667c;
    --accent: #6b3fa0;
    --accent-soft: #efe7f7;
    --warn: #f6d8c0;
    --shadow: 0 14px 30px rgba(0, 0, 0, 0.08);
    --radius: 20px;
}

@media (max-width: 900px) {
    .dashboard-header-actions,
    .assess-header-actions {
        width: 100%;
        min-width: 0;
    }

    .assessment-runner-page-header {
        flex-wrap: nowrap;
    }

    .assessment-runner-header-actions {
        width: auto;
        min-width: 0;
        gap: 8px;
    }

    .assessment-runner {
        grid-template-columns: 1fr;
    }

    .assessment-control {
        position: static;
    }

    .assessment-grid-shell {
        height: var(--assessment-grid-shell-height, calc(100dvh - 190px));
    }

    .assessment-topic-grid {
        gap: 12px;
    }
}

@media (max-width: 720px) {
    .assess-topic-row {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .assess-topic-actions {
        justify-content: space-between;
    }

    .assessment-topic-grid {
        gap: 10px;
    }

    .assessment-runner-page-header {
        gap: 10px;
    }

    .assessment-runner-header-actions {
        gap: 6px;
    }

    .assessment-runner-icon-btn {
        width: 42px;
        height: 42px;
        border-radius: 14px;
    }

    .assessment-runner-icon-btn svg {
        width: 18px;
        height: 18px;
    }

    .assessment-runner-icon-btn-with-label {
        padding: 0 10px;
        gap: 6px;
        font-size: 12px;
    }

    .assessment-runner-header-actions .btn {
        padding: 12px 14px;
        font-size: 13px;
        white-space: nowrap;
    }
}

@media print {
    @page {
        size: A4 landscape;
        margin: 10mm;
    }

    header.app-header,
    .app-header-restore,
    .report-page-header,
    .banner {
        display: none !important;
    }

    .app-main {
        padding: 0;
    }

    .assessment-report-wrap {
        overflow: visible;
        box-shadow: none;
        padding: 0;
    }

    .assessment-report-section {
        page-break-inside: avoid;
        break-inside: avoid;
    }

    .assessment-report-break {
        display: block;
        page-break-after: always;
        break-after: page;
    }
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Space Grotesk", "Segoe UI", sans-serif;
    background: radial-gradient(circle at top, #faf5ff, #ebe3f7);
    color: var(--ink);
}

.splash-loader {
    position: fixed;
    inset: 0;
    background: radial-gradient(circle at top, #faf5ff, #ebe3f7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 60;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.splash-loader.is-hide {
    opacity: 0;
    transform: scale(1.02);
    pointer-events: none;
}

.splash-card {
    background: var(--surface);
    border-radius: 24px;
    padding: 24px 28px;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.splash-title {
    font-weight: 700;
    font-size: 18px;
}

.splash-subtitle {
    font-size: 13px;
    color: var(--muted);
}

.page-loader {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: transparent;
    z-index: 50;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
}

.page-loader.is-active {
    opacity: 1;
}

.page-loader-bar {
    height: 100%;
    width: 20%;
    background: linear-gradient(90deg, #6b3fa0, #9d6ad9);
    border-radius: 999px;
    transform: translateX(-100%);
}

.page-loader.is-animating .page-loader-bar {
    animation: loader-slide 1s ease infinite;
}

@keyframes loader-slide {
    0% { transform: translateX(-30%); }
    50% { transform: translateX(80%); }
    100% { transform: translateX(140%); }
}

a {
    color: inherit;
    text-decoration: none;
}

.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 32px;
    background: var(--surface);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 10;
    transition: transform 0.22s ease, opacity 0.22s ease;
}

.app-brand-group {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
}

.app-brand {
    font-weight: 700;
    font-size: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
}

.app-header-toggle,
.app-header-restore {
    width: 34px;
    height: 34px;
    border: none;
    border-radius: 999px;
    background: #f1ecf7;
    color: var(--muted);
    font-size: 18px;
    font-weight: 700;
    line-height: 1;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.08s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.app-header-toggle svg,
.app-header-restore svg {
    width: 16px;
    height: 16px;
    stroke: currentColor;
    stroke-width: 2.4;
    stroke-linecap: round;
    stroke-linejoin: round;
    fill: none;
    flex: 0 0 auto;
}

.app-header-toggle:hover,
.app-header-restore:hover {
    background: #e9e1f3;
    box-shadow: 0 10px 18px rgba(107, 63, 160, 0.16);
}

.app-header-toggle:active,
.app-header-restore:active {
    transform: scale(0.97);
}

.app-header-restore {
    position: fixed;
    top: 12px;
    left: 16px;
    z-index: 12;
    display: none;
    width: 30px;
    height: 30px;
    background: rgba(255, 255, 255, 0.94);
    box-shadow: 0 10px 18px rgba(23, 17, 31, 0.14);
}

.app-header-restore svg {
    width: 14px;
    height: 14px;
}

html.header-hidden .app-header {
    position: fixed;
    inset: 0 0 auto 0;
    transform: translateY(calc(-100% - 12px));
    opacity: 0;
    pointer-events: none;
}

html.header-hidden .app-header-restore {
    display: inline-flex;
}

.app-icon {
    width: 28px;
    height: 28px;
    border-radius: 6px;
}

.app-nav {
    display: flex;
    gap: 16px;
}

.app-nav a {
    padding: 10px 14px;
    border-radius: 999px;
    background: #f1ecf7;
}

.app-menu-toggle {
    display: none;
    border: none;
    background: transparent;
    font-size: 22px;
    cursor: pointer;
}

.app-main {
    padding: 28px 32px 48px;
}

.assessment-runner-page .app-main {
    padding-bottom: 0;
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.class-switcher {
    position: relative;
    width: min(100%, 520px);
}

.class-switcher-title {
    margin: 0;
}

.class-switcher-trigger {
    width: 100%;
    border: none;
    border-radius: 24px;
    padding: 18px 22px;
    background: var(--surface);
    box-shadow: var(--shadow);
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
        "copy caret"
        "meta caret";
    gap: 8px 16px;
    align-items: center;
    text-align: left;
    cursor: pointer;
    transition: transform 0.1s ease, box-shadow 0.2s ease;
}

.class-switcher-trigger:hover {
    transform: translateY(-2px);
    box-shadow: 0 18px 28px rgba(107, 63, 160, 0.16);
}

.class-switcher-trigger:active {
    transform: scale(0.99);
}

.class-switcher-trigger:disabled {
    cursor: default;
}

.class-switcher-trigger:disabled:hover {
    transform: none;
    box-shadow: var(--shadow);
}

.class-switcher-copy {
    grid-area: copy;
    display: flex;
    align-items: baseline;
    gap: 12px;
    flex-wrap: wrap;
    min-width: 0;
}

.class-switcher-name {
    font-size: clamp(30px, 4vw, 40px);
    font-weight: 700;
    line-height: 1;
}

.class-switcher-subject {
    font-size: clamp(18px, 2.4vw, 24px);
    font-weight: 100;
    color: var(--muted);
    line-height: 1.1;
}

.class-switcher-meta {
    grid-area: meta;
    font-size: 13px;
    color: var(--muted);
}

.class-switcher-caret {
    grid-area: caret;
    align-self: center;
    font-size: 20px;
    color: var(--muted);
    transition: transform 0.18s ease;
}

.class-switcher.is-open .class-switcher-caret {
    transform: rotate(180deg);
}

.class-switcher-menu {
    position: absolute;
    top: calc(100% + 12px);
    left: 0;
    width: 100%;
    background: var(--surface);
    border-radius: 24px;
    box-shadow: 0 18px 32px rgba(23, 17, 31, 0.16);
    padding: 10px;
    display: none;
    flex-direction: column;
    gap: 8px;
    z-index: 9;
}

.class-switcher-menu.is-open {
    display: flex;
}

.class-switcher-option {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 16px 18px;
    border-radius: 18px;
    background: #f8f4fd;
    transition: transform 0.1s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.class-switcher-option:hover {
    transform: translateY(-1px);
    background: #f1e9fb;
    box-shadow: 0 10px 18px rgba(107, 63, 160, 0.12);
}

.class-switcher-option.is-current {
    background: var(--accent-soft);
}

.class-switcher-option-copy {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 0;
}

.class-switcher-option-name {
    font-size: 17px;
    font-weight: 700;
}

.class-switcher-option-subject {
    font-size: 14px;
    color: var(--muted);
    font-weight: 400;
}

.class-switcher-option-state {
    flex: 0 0 auto;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--accent);
}

.page-actions {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 24px;
}

.dashboard-header-actions,
.assess-header-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
    min-width: 180px;
}

.assessment-runner-header-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 12px;
    flex: 0 0 auto;
    min-width: 0;
}

.assessment-runner-icon-btn {
    width: 48px;
    height: 48px;
    border: none;
    border-radius: 16px;
    background: #f1ecf7;
    color: var(--muted);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: transform 0.08s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.assessment-runner-icon-btn:hover {
    background: #e9e1f3;
    box-shadow: 0 10px 18px rgba(107, 63, 160, 0.16);
}

.assessment-runner-icon-btn:active {
    transform: scale(0.97);
}

.assessment-runner-icon-btn svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    stroke-width: 1.9;
    stroke-linecap: round;
    stroke-linejoin: round;
    fill: none;
}

.assessment-runner-icon-btn-with-label {
    width: auto;
    padding: 0 14px;
    gap: 8px;
    white-space: nowrap;
    font-size: 13px;
    font-weight: 700;
}

.assessment-runner-page-header {
    flex-wrap: nowrap;
}

.assessment-runner-page-header > div:first-child {
    min-width: 0;
    flex: 1 1 auto;
}

.assessment-runner-page-header h1 {
    margin: 0;
    font-size: clamp(22px, 2vw, 32px);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.login-chip {
    display: flex;
    align-items: center;
    gap: 10px;
    background: #f3eff8;
    border-radius: 999px;
    padding: 8px 12px;
}

.muted {
    color: var(--muted);
    font-size: 14px;
}

.banner {
    padding: 14px 24px;
    background: var(--warn);
    color: #5a3a1b;
}

.btn {
    border: none;
    border-radius: 14px;
    padding: 14px 20px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.08s ease, box-shadow 0.2s ease;
}

.btn.is-disabled {
    pointer-events: none;
    opacity: 0.5;
}
.btn:hover {
    box-shadow: 0 10px 18px rgba(107, 63, 160, 0.2);
}

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

.btn-primary {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 8px 16px rgba(47, 107, 95, 0.24);
}

.btn-secondary {
    background: var(--accent-soft);
    color: var(--accent);
}

.btn-assess-contrast {
    background: #20152d;
    color: #fff;
    box-shadow: 0 10px 22px rgba(32, 21, 45, 0.22);
}

.btn-assess-contrast:hover {
    box-shadow: 0 14px 24px rgba(32, 21, 45, 0.28);
}

.btn-ghost {
    background: transparent;
    color: var(--muted);
}

.icon-btn {
    background: transparent;
    border: none;
    font-size: 24px;
    cursor: pointer;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
}

.card {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
    transition: transform 0.12s ease, box-shadow 0.2s ease;
    animation: rise 0.35s ease both;
}

.danger-zone {
    border: 1px solid #f0c9b5;
    background: #fff7f3;
}

.class-card {
    display: flex;
    flex-direction: column;
    gap: 8px;
    min-height: 140px;
    transition: transform 0.1s ease;
    position: relative;
}

.class-card:hover {
    transform: translateY(-4px);
}

.card:hover {
    transform: translateY(-2px);
}

.card-title {
    font-weight: 600;
    font-size: 18px;
}

.class-subject {
    font-weight: 600;
    font-size: 20px;
    color: #b0a7bd;
}

.class-year {
    position: absolute;
    top: 12px;
    right: 14px;
    font-size: 12px;
    color: #b0a7bd;
    font-weight: 600;
}

.card-meta {
    font-size: 13px;
    color: var(--muted);
}

.empty-state {
    padding: 24px;
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    color: var(--muted);
}

.rows-pane {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.row-pane {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
    min-height: 30vh;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.pane-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
}

.rail {
    display: flex;
    gap: 16px;
    overflow-x: auto;
    padding-bottom: 8px;
}

.assignment-card {
    min-width: 220px;
    flex: 0 0 auto;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.card-title-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.card-title-row .icon-btn {
    background: #f3eff8;
    border-radius: 999px;
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
}

.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.35);
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
    z-index: 20;
}

.modal.is-open {
    display: flex;
}

.modal-card {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 24px;
    width: min(520px, 100%);
    box-shadow: var(--shadow);
}

.modal-card.wide {
    width: min(720px, 100%);
}

.modal-card {
    max-height: 85vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 16px;
}

.stack {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.assess-card {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.assess-topic-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
    height: min(44vh, 420px);
    overflow-y: auto;
    padding-right: 6px;
}

.assess-topic-row {
    width: 100%;
    background: #f8f4fd;
    border-radius: 18px;
    padding: 18px 20px;
    display: grid;
    grid-template-columns: 140px minmax(0, 1fr) auto;
    gap: 18px;
    align-items: center;
    text-align: left;
    transition: transform 0.1s ease, box-shadow 0.2s ease, background 0.2s ease;
    cursor: pointer;
}

.assess-topic-row:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 24px rgba(107, 63, 160, 0.12);
}

.assess-topic-row.is-selected {
    background: #ece1fa;
    box-shadow: inset 0 0 0 2px rgba(107, 63, 160, 0.18);
}

.assess-topic-date {
    font-size: 13px;
    color: var(--muted);
    font-weight: 600;
}

.assess-topic-copy {
    min-width: 0;
}

.assess-topic-code {
    font-weight: 700;
    font-size: 14px;
    letter-spacing: 0.04em;
    color: var(--accent);
    text-transform: uppercase;
}

.assess-topic-name {
    font-size: 18px;
    font-weight: 600;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

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

.assess-topic-check {
    width: 24px;
    text-align: center;
    color: var(--accent);
    font-size: 20px;
    font-weight: 700;
}

.assess-edit-btn {
    padding-inline: 16px;
}

.assess-footer-actions {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    flex-wrap: wrap;
}

.topic-input-stack {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.topic-input-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 12px;
    align-items: center;
}

.topic-input-row input {
    width: 100%;
}

.topic-remove-btn {
    width: 42px;
    height: 42px;
    background: #f1ecf7;
    border-radius: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.topic-add-btn {
    align-self: flex-start;
}

.assessment-runner {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 20px;
    align-items: stretch;
}

.assessment-grid-shell {
    height: var(--assessment-grid-shell-height, calc(100dvh - 220px));
    min-height: 0;
    padding-bottom: 10px;
}

.assessment-topic-grid {
    --assessment-grid-rows: 2;
    --assessment-grid-columns: 1;
    height: 100%;
    display: grid;
    grid-template-columns: repeat(var(--assessment-grid-columns), minmax(0, 1fr));
    grid-template-rows: repeat(var(--assessment-grid-rows), minmax(0, 1fr));
    gap: 16px;
}

.assessment-topic-card {
    background: var(--surface);
    border-radius: 24px;
    box-shadow: var(--shadow);
    padding: clamp(6px, 1.2vw + 0.5vh, 18px);
    display: flex;
    flex-direction: column;
    gap: clamp(4px, 0.8vw + 0.4vh, 14px);
    min-height: 0;
    min-width: 0;
    overflow: hidden;
}

.assessment-topic-title {
    font-size: clamp(11px, 1vw + 0.7vh, 20px);
    font-weight: 700;
    line-height: 1.1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 0 0 auto;
}

.assessment-score-stack {
    display: flex;
    flex-direction: column;
    gap: clamp(3px, 0.55vh, 8px);
    flex: 1 1 auto;
    min-height: 0;
}

.assessment-score-btn {
    flex: 1 1 0;
    min-height: 0;
    border: none;
    border-radius: clamp(8px, 0.8vw + 0.4vh, 14px);
    padding: 0;
    font-size: clamp(10px, 0.85vw + 0.55vh, 18px);
    font-weight: 700;
    color: #fff;
    cursor: pointer;
    background: rgba(var(--topic-rgb), var(--score-opacity));
    transition: transform 0.08s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.assessment-score-btn span {
    line-height: 1;
}

.assessment-score-btn:hover {
    transform: translateY(-1px);
}

.assessment-score-btn.is-midpoint {
    color: #17111f;
    box-shadow: inset 0 0 0 2px rgba(23, 17, 31, 0.7);
}

.assessment-score-btn.is-selected {
    background: #17111f !important;
    color: #fff;
    transform: translateY(-1px) scale(1.01);
    box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.88), 0 12px 20px rgba(0, 0, 0, 0.34);
}

.assessment-score-btn.is-midpoint.is-selected {
    box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.92), 0 12px 20px rgba(0, 0, 0, 0.34);
}

.assessment-control {
    background: var(--surface);
    border-radius: 24px;
    box-shadow: var(--shadow);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 18px;
    position: sticky;
    top: 96px;
    align-self: start;
}

.assessment-control-topbar {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-bottom: -4px;
}

.assessment-control-icon-btn {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 14px;
    background: #f1ecf7;
    color: var(--muted);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: transform 0.08s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.assessment-control-icon-btn:hover {
    background: #e9e1f3;
    box-shadow: 0 10px 18px rgba(107, 63, 160, 0.16);
}

.assessment-control-icon-btn:active {
    transform: scale(0.97);
}

.assessment-control-icon-btn svg {
    width: 18px;
    height: 18px;
    stroke: currentColor;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
    fill: none;
}

.assessment-student-no {
    font-size: 40px;
    font-weight: 700;
    line-height: 1;
}

.assessment-student-name {
    margin-top: 8px;
    font-size: 17px;
    color: var(--muted);
}

.assessment-nav-buttons {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.assessment-toggle-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
    align-items: center;
}

.assessment-toggle {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
}

.assessment-toggle-compact {
    gap: 8px;
    font-size: 12px;
    color: var(--muted);
    white-space: nowrap;
}

.assessment-toggle-compact span {
    line-height: 1.1;
}

.assessment-toggle input {
    width: 18px;
    height: 18px;
    margin: 0;
}

.assessment-toggle-icon {
    justify-self: end;
}

.assessment-toggle-icon span[aria-hidden="true"] {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.assessment-toggle-icon svg {
    width: 18px;
    height: 18px;
    stroke: currentColor;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
    fill: none;
}

.assessment-settings-note {
    margin: 0;
    padding: 12px 14px;
    border-radius: 14px;
    background: #f6f1fb;
    color: var(--muted);
    font-size: 13px;
    line-height: 1.4;
}

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

.assessment-control-meta {
    min-height: 42px;
    color: var(--muted);
    font-size: 14px;
}

.assessment-runner.is-fullscreen,
.assessment-runner:fullscreen,
.assessment-runner:-webkit-full-screen {
    width: 100vw;
    height: 100dvh;
    padding: 18px;
    box-sizing: border-box;
    background: radial-gradient(circle at top, #faf5ff, #ebe3f7);
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 18px;
    align-items: stretch;
}

.assessment-runner.is-fullscreen .assessment-grid-shell,
.assessment-runner:fullscreen .assessment-grid-shell,
.assessment-runner:-webkit-full-screen .assessment-grid-shell {
    padding-bottom: 0;
}

.assessment-runner.is-fullscreen .assessment-control,
.assessment-runner:fullscreen .assessment-control,
.assessment-runner:-webkit-full-screen .assessment-control {
    position: static;
    top: auto;
    align-self: stretch;
}

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

.layout-choice.is-active {
    box-shadow: inset 0 0 0 2px rgba(107, 63, 160, 0.25);
}

.assessment-report-sections {
    display: flex;
    flex-direction: column;
    gap: 26px;
}

.assessment-report-wrap {
    overflow-x: auto;
    background: var(--surface);
    border-radius: 24px;
    box-shadow: var(--shadow);
    padding: 18px;
}

.assessment-report-table {
    width: max-content;
    min-width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

.assessment-report-table th,
.assessment-report-table td {
    border: 1px solid #e9dfef;
    text-align: center;
    background: #fff;
}

.assessment-report-student-col {
    min-width: 220px;
    padding: 12px 16px;
    text-align: left !important;
    position: sticky;
    left: 0;
    z-index: 2;
    background: #fbf8fd !important;
}

.assessment-report-topic-col {
    width: 74px;
    min-width: 74px;
    height: 180px;
    position: relative;
    vertical-align: bottom;
    background: #fbf8fd !important;
}

.assessment-report-topic-rotated {
    position: absolute;
    bottom: 12px;
    left: 16px;
    width: 160px;
    transform: rotate(-90deg);
    transform-origin: left bottom;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-size: 13px;
    font-weight: 700;
    text-align: left;
}

.assessment-report-score-cell {
    min-width: 74px;
    height: 52px;
    font-size: 18px;
    font-weight: 700;
}

.assessment-report-score-cell.is-score-0 { background: #f5eff9; }
.assessment-report-score-cell.is-score-1 { background: #ece1f6; }
.assessment-report-score-cell.is-score-2 { background: #e0cff1; }
.assessment-report-score-cell.is-score-3 { background: #d1b8ea; }
.assessment-report-score-cell.is-score-4 { background: #c09de2; }
.assessment-report-score-cell.is-score-5 { background: #aa7bd5; color: #fff; }
.assessment-report-score-cell.is-score-6 { background: #8d56c2; color: #fff; }

.assessment-report-break {
    display: none;
}

.field {
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-size: 14px;
}

input, select {
    padding: 14px;
    border-radius: 12px;
    border: 1px solid #e0e4df;
    font-size: 15px;
}

textarea {
    padding: 14px;
    border-radius: 12px;
    border: 1px solid #e0e4df;
    font-size: 15px;
    resize: vertical;
}

.book-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
}

.book-card {
    background: #f5f1fa;
    border-radius: 16px;
    padding: 12px;
    cursor: pointer;
    transition: transform 0.1s ease;
}

.book-card:hover {
    transform: translateY(-2px);
}

.book-card input {
    display: none;
}

.book-card-body {
    display: flex;
    flex-direction: column;
    gap: 6px;
    position: relative;
    z-index: 0;
}

.book-card-code {
    font-weight: 700;
    font-size: 13px;
    color: var(--muted);
}

.book-card-title {
    font-weight: 600;
}

.book-card input:checked + .book-card-body::before {
    content: '';
    position: absolute;
    inset: -12px;
    background: var(--accent-soft);
    border-radius: 16px;
    z-index: -1;
}

.settings-grid, .stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.list {
    margin-top: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.list-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #f5f1fa;
    border-radius: 14px;
    padding: 12px 14px;
}

.unlock-panel {
    display: flex;
    gap: 10px;
    align-items: center;
}

.handin-layout {
    display: grid;
    grid-template-columns: 1.6fr 0.8fr;
    gap: 24px;
}

.scanner-panel {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.scanner-preview {
    width: 100%;
    aspect-ratio: 4 / 3;
    max-height: 80vh;
    border-radius: 16px;
    background: #101413;
    color: #b8c1bb;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.scanner-preview video,
.scanner-preview canvas {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 16px;
}

.camera-view {
    width: 100%;
    height: 100%;
}

.scanner-overlay {
    position: absolute;
    inset: 16px;
    border: 2px dashed rgba(255, 255, 255, 0.5);
    border-radius: 12px;
}

.scan-info {
    position: absolute;
    left: 16px;
    top: 16px;
    padding: 10px 12px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.78);
    color: #1b1b1b;
    backdrop-filter: blur(6px);
    max-width: 90%;
}

.scan-switch {
    position: absolute;
    top: 12px;
    right: 12px;
    color: #fff;
    font-size: 24px;
    text-shadow: 0 3px 8px rgba(0, 0, 0, 0.6);
}

.scan-title {
    font-weight: 700;
    font-size: 16px;
}

.scan-subtitle {
    font-size: 13px;
    color: #4b4b4b;
}

.scan-feedback {
    padding: 12px;
    border-radius: 12px;
    background: #f1ecf7;
    min-height: 48px;
}

.unlock-modal {
    display: flex;
    flex-direction: column;
    gap: 12px;
}


.manual-entry {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
}

.manual-entry input {
    flex: 1;
}

.grid-panel {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
}

.grid-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.student-grid {
    display: grid;
    grid-template-columns: repeat(7, minmax(0, 1fr));
    gap: 10px;
}

.student-tile {
    background: #e6e0ef;
    border-radius: 14px;
    padding: 12px;
    text-align: center;
    min-height: 64px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    position: relative;
    transition: transform 0.08s ease, box-shadow 0.2s ease;
}

.student-tile .student-no {
    line-height: 1;
}

.handin-action {
    margin-top: 12px;
}

.handin-action .btn {
    width: 100%;
}

.handin-footer-mobile {
    display: none;
}
.handin-page {
    overflow-x: hidden;
    width: 100%;
}
.handin-footer-mobile form {
    margin: 0;
}

.student-tile.is-done {
    background: #cfead7;
    color: #1f4d36;
}

.student-tile.is-mismatch {
    background: #f4e08a;
    color: #5a4704;
}

.student-no {
    font-weight: 700;
}

.student-tile:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.08);
}

.student-tile::after {
    content: attr(data-tooltip);
    position: absolute;
    left: 50%;
    bottom: calc(100% + 6px);
    transform: translateX(-50%) translateY(6px);
    background: rgba(23, 17, 31, 0.92);
    color: #fff;
    padding: 6px 10px;
    border-radius: 10px;
    font-size: 12px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.12s ease, transform 0.12s ease;
}

.student-tile:hover::after,
.student-tile:focus-within::after,
.student-tile:active::after {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.toggle-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(60px, 1fr));
    gap: 8px;
}

.toggle-btn {
    background: #f3eff8;
    border-radius: 12px;
    padding: 10px;
    text-align: center;
    cursor: pointer;
    transition: background 0.15s ease, transform 0.08s ease;
}

.toggle-btn input {
    display: none;
}

.toggle-btn input:checked + span {
    color: #2e1a4a;
    font-weight: 600;
}

.toggle-btn:has(input:checked) {
    background: #d5c3ee;
}

.label-form {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
}

.field-inline {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
}

.field-inline input {
    width: 80px;
}

.label-grid {
    display: grid;
    grid-template-columns: repeat(var(--label-columns, 2), minmax(200px, 1fr));
    gap: 12px;
}

.label-card {
    display: grid;
    --label-gap-inverse: calc(var(--label-gap-max, 20px) - var(--label-gap, 6px));
    grid-template-columns: calc(100% - var(--label-qr-size, 100px) - var(--label-gap, 6px) - var(--label-gap-inverse)) var(--label-qr-size, 100px);
    gap: var(--label-gap, 6px);
    background: var(--surface);
    border-radius: 16px;
    padding: var(--label-padding, 14px);
    box-shadow: var(--shadow);
}

.label-text {
    font-size: var(--label-text-size, 14px);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.label-text div {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.label-qr {
    display: flex;
    align-items: center;
    justify-content: center;
}

.qr-placeholder {
    width: 100px;
    height: 100px;
    border: 2px solid #222;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    text-align: center;
    padding: 6px;
}

.qr-image {
    width: var(--label-qr-size, 100px);
    height: var(--label-qr-size, 100px);
    image-rendering: pixelated;
}

.chip {
    padding: 6px 10px;
    background: #f3eff8;
    border-radius: 999px;
    font-size: 12px;
}

.progress-bar {
    height: 4px;
    border-radius: 999px;
    background: #ebe5f4;
    overflow: hidden;
    margin: 6px 0 12px;
}

.progress-bar-fill {
    display: block;
    height: 100%;
    background: #6b3fa0;
    border-radius: 999px;
    transition: width 0.2s ease;
}

.full-width {
    width: 100%;
}

.is-hidden {
    display: none;
}

.return-scanner {
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-height: 420px;
    transition: max-height 0.25s ease, opacity 0.25s ease, transform 0.25s ease;
}
.return-scanner.is-hidden {
    max-height: 0;
    opacity: 0;
    transform: translateY(-10px);
    overflow: hidden;
}
.return-list {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}
.return-notreturned {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 140px;
    overflow-y: auto;
}
.return-title {
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--muted);
}
.return-sticky {
    position: sticky;
    bottom: 0;
    background: var(--surface);
    padding-top: 10px;
}
.return-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 10px;
    border-radius: 999px;
    background: #efe6ff;
    color: #4b2d77;
    font-size: 12px;
    font-weight: 600;
}

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

.simple-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.simple-table th,
.simple-table td {
    text-align: left;
    padding: 12px 10px;
    border-bottom: 1px solid #ede7f5;
    vertical-align: middle;
}

.table-title {
    font-weight: 600;
}

.small {
    font-size: 12px;
}

.table-actions {
    display: flex;
    gap: 8px;
    flex-wrap: nowrap;
    align-items: center;
    white-space: nowrap;
}
.table-actions form {
    margin: 0;
}
.table-actions .btn {
    white-space: nowrap;
}

.filter-bar {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
}

.filter-dropdown {
    position: relative;
}

.filter-panel {
    position: absolute;
    right: 0;
    top: 48px;
    background: var(--surface);
    border-radius: 16px;
    padding: 12px;
    box-shadow: var(--shadow);
    display: none;
    min-width: 200px;
    z-index: 5;
}

.filter-panel.is-open {
    display: grid;
    gap: 8px;
}

.chart-box {
    margin-top: 12px;
}

.student-heatmap {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 12px;
}

.heatmap-row {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 12px;
    align-items: center;
}

.heatmap-label {
    text-align: left;
    background: transparent;
    border: none;
    font-weight: 600;
    cursor: pointer;
    padding: 6px 0;
}

.heatmap-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(12px, 1fr));
    gap: 4px;
    justify-content: start;
    justify-items: start;
}

.heatmap-cell {
    width: 12px;
    height: 12px;
    border-radius: 3px;
    background: #ded6e8;
    position: relative;
}

.heatmap-cell.is-hit {
    background: #9ed7b5;
}

.heatmap-cell.is-miss {
    background: #d4d5da;
}

.heatmap-cell.is-mismatch {
    background: #f2d06b;
}

.heatmap-cell::after {
    content: attr(data-tooltip);
    position: absolute;
    left: 50%;
    bottom: 16px;
    transform: translateX(-50%) translateY(6px);
    background: rgba(23, 17, 31, 0.92);
    color: #fff;
    padding: 6px 10px;
    border-radius: 10px;
    font-size: 12px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.12s ease, transform 0.12s ease;
}

.heatmap-cell:hover::after {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.student-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 12px;
}

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

.detail-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 10px;
    border-radius: 12px;
    background: #f4eff9;
}

.assign-block {
    border-top: 1px solid #ede7f5;
    padding-top: 12px;
    margin-top: 12px;
}

.assign-title {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
}

.pagination {
    display: flex;
    gap: 6px;
    margin-top: 10px;
    flex-wrap: wrap;
}

.pagination .btn.is-active {
    background: #dcd0ef;
    color: #3c1e5c;
}

@media (max-width: 960px) {
    .class-switcher {
        width: 100%;
    }

    .class-switcher-trigger {
        padding: 18px 18px 16px;
    }

    .class-switcher-copy {
        gap: 8px;
    }

    .class-switcher-menu {
        position: static;
        margin-top: 12px;
    }

    .class-switcher-option {
        padding: 16px;
    }

    .heatmap-row {
        grid-template-columns: 1fr;
    }

    .heatmap-grid {
        grid-template-columns: repeat(auto-fit, minmax(10px, 1fr));
    }

    .student-detail-grid {
        grid-template-columns: 1fr;
    }
}

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

@media (prefers-reduced-motion: reduce) {
    .card {
        animation: none;
        transition: none;
    }
    .student-tile {
        transition: none;
    }
    .page-loader-bar {
        animation: none;
    }
    .splash-loader {
        transition: none;
    }
}

@media (max-width: 960px) {
    .handin-layout {
        display: flex;
        flex-direction: column;
        gap: 12px;
        padding-bottom: 86px;
        width: 100%;
        max-width: 100%;
    }

    .grid-panel {
        order: 2;
        display: flex;
        flex-direction: column;
        width: 100%;
        max-width: 100%;
    }

    .scanner-panel {
        order: 1;
    }

    .student-grid {
        order: 1;
    }

    .grid-header {
        order: 2;
    }

    .manual-entry {
        order: 3;
    }

    .student-grid {
        grid-template-columns: repeat(7, minmax(0, 1fr));
        gap: 4px;
    }

    .scanner-panel {
        padding: 12px;
        gap: 8px;
        width: 100%;
        max-width: 100%;
    }

    .scanner-preview {
        height: min(60vh, calc(100vw * 0.75));
        max-height: none;
    }

    .grid-panel {
        padding: 12px;
    }

    .grid-header {
        margin-bottom: 4px;
    }

    .manual-entry {
        margin-bottom: 8px;
    }

    .student-tile {
        min-height: 22px;
        padding: 2px;
    }

    .student-no {
        font-size: 10px;
    }

    .scan-feedback {
        min-height: 36px;
        font-size: 12px;
    }

    .handin-action .btn {
        width: 100%;
        margin-top: 12px;
    }

    .handin-action {
        display: none;
    }

    .handin-footer-mobile {
        display: block;
        position: fixed;
        left: 0;
        right: 0;
        bottom: 0;
        width: auto;
        padding: 10px 14px calc(14px + env(safe-area-inset-bottom));
        background: var(--surface);
        box-shadow: 0 -12px 24px rgba(0, 0, 0, 0.08);
        z-index: 15;
        overflow-x: clip;
        margin: 0;
    }

    .handin-footer-mobile .btn {
        width: 100%;
        display: block;
    }

    .scan-info {
        padding: 8px 10px;
        top: 10px;
        left: 10px;
    }

    .scan-switch {
        top: 10px;
        right: 10px;
    }

    .app-nav {
        display: none;
        flex-direction: column;
        gap: 8px;
        position: absolute;
        right: 16px;
        top: 64px;
        background: var(--surface);
        border-radius: 16px;
        padding: 12px;
        box-shadow: var(--shadow);
    }

    .app-nav.is-open {
        display: flex;
    }

    .app-menu-toggle {
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }
}