:root {
    --ink: #183153;
    --muted: #61708a;
    --line: #dce5f0;
    --surface: #ffffff;
    --surface-soft: #f5f8fc;
    --primary: #1f6feb;
    --primary-dark: #1759bd;
    --accent: #ffb703;
    --success: #15803d;
    --success-soft: #ecfdf3;
    --danger: #c62828;
    --danger-soft: #fff1f1;
    --warning-soft: #fff8df;
    --shadow: 0 18px 50px rgba(29, 64, 112, 0.10);
    --radius: 20px;
    --radius-small: 12px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    color: var(--ink);
    background:
        radial-gradient(circle at top left, rgba(31, 111, 235, 0.10), transparent 30rem),
        var(--surface-soft);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.6;
}

button,
input {
    font: inherit;
}

a {
    color: inherit;
}

.shell {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
}

.hidden {
    display: none !important;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    border-bottom: 1px solid rgba(220, 229, 240, 0.85);
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(14px);
}

.header-inner {
    min-height: 74px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.brand-mark {
    width: 46px;
    height: 46px;
    display: grid;
    place-items: center;
    border-radius: 14px;
    color: #fff;
    background: linear-gradient(145deg, var(--primary), #4f8ff4);
    font-weight: 900;
    letter-spacing: -0.04em;
    box-shadow: 0 10px 24px rgba(31, 111, 235, 0.25);
}

.brand strong,
.brand small {
    display: block;
}

.brand strong {
    line-height: 1.15;
    font-size: 1.04rem;
}

.brand small {
    color: var(--muted);
    font-size: 0.76rem;
    margin-top: 2px;
}

.header-link {
    color: var(--primary);
    font-weight: 700;
    text-decoration: none;
}

.page-space,
.quiz-page {
    padding: 42px 0 72px;
}

.panel,
.hero-card,
.quiz-card,
.empty-state {
    border: 1px solid rgba(220, 229, 240, 0.92);
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.hero-card {
    padding: 38px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 34px;
    overflow: hidden;
    position: relative;
}

.hero-card::after {
    content: "";
    position: absolute;
    width: 240px;
    height: 240px;
    right: -90px;
    bottom: -120px;
    border-radius: 50%;
    background: rgba(31, 111, 235, 0.08);
}

.hero-card h1,
.quiz-title-row h1,
.empty-state h1 {
    margin: 7px 0 12px;
    line-height: 1.15;
    letter-spacing: -0.035em;
}

.hero-card h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    max-width: 760px;
}

.hero-card p,
.lead {
    color: var(--muted);
    font-size: 1.04rem;
    margin: 0;
}

.hero-stat {
    min-width: 150px;
    min-height: 150px;
    display: grid;
    place-content: center;
    text-align: center;
    border-radius: 50%;
    background: #eef5ff;
    color: var(--primary);
    position: relative;
    z-index: 1;
}

.hero-stat strong,
.progress-summary strong {
    display: block;
    font-size: 2.4rem;
    line-height: 1;
}

.hero-stat span,
.progress-summary span {
    color: var(--muted);
    font-size: 0.88rem;
    margin-top: 8px;
}

.eyebrow {
    color: var(--primary);
    font-size: 0.75rem;
    font-weight: 900;
    letter-spacing: 0.12em;
}

.section-heading {
    margin: 42px 0 18px;
    display: flex;
    align-items: end;
    justify-content: space-between;
}

.section-heading h2 {
    margin: 4px 0 0;
    font-size: 1.8rem;
    letter-spacing: -0.025em;
}

.compact-heading {
    margin-top: 0;
}

.quiz-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
}

.quiz-card {
    padding: 24px;
}

.quiz-card-topline,
.quiz-title-row {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 20px;
}

.quiz-card h3 {
    font-size: 1.35rem;
    margin: 20px 0 8px;
    letter-spacing: -0.02em;
}

.quiz-card p {
    color: var(--muted);
    margin: 0 0 24px;
}

.tag,
.mode-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    padding: 6px 10px;
    font-size: 0.76rem;
    font-weight: 800;
    white-space: nowrap;
}

.tag {
    background: #eef5ff;
    color: var(--primary);
}

.mode-badge {
    background: var(--warning-soft);
    color: #8a5c00;
}

.button {
    min-height: 44px;
    border: 0;
    border-radius: 12px;
    padding: 11px 18px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    cursor: pointer;
    text-decoration: none;
    font-weight: 800;
    transition: transform 0.16s ease, box-shadow 0.16s ease, background 0.16s ease;
}

.button:hover {
    transform: translateY(-1px);
}

.button:disabled {
    cursor: wait;
    opacity: 0.65;
    transform: none;
}

.button-primary {
    color: #fff;
    background: var(--primary);
    box-shadow: 0 10px 24px rgba(31, 111, 235, 0.20);
}

.button-primary:hover {
    background: var(--primary-dark);
}

.button-ghost {
    color: var(--primary);
    background: #eef5ff;
}

.button-block {
    width: 100%;
}

.button-large {
    min-height: 52px;
    padding-inline: 24px;
}

.empty-state {
    padding: 50px 28px;
    text-align: center;
}

.empty-state p {
    color: var(--muted);
}

.loading-panel,
.error-panel,
.start-panel {
    max-width: 820px;
    margin: 0 auto;
    padding: 34px;
}

.loading-panel,
.error-panel {
    text-align: center;
}

.spinner {
    width: 42px;
    height: 42px;
    margin: 0 auto 14px;
    border: 4px solid #dbe8fb;
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.student-form {
    margin-top: 28px;
    display: grid;
    grid-template-columns: 1.6fr 0.8fr;
    gap: 18px;
}

.student-form label span {
    display: block;
    margin-bottom: 8px;
    font-weight: 800;
}

.student-form input {
    width: 100%;
    min-height: 52px;
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 12px 14px;
    color: var(--ink);
    background: #fff;
    outline: none;
}

.student-form input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(31, 111, 235, 0.10);
}

.start-actions,
.field-error {
    grid-column: 1 / -1;
}

.start-actions,
.result-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.field-error {
    margin: -6px 0 0;
    color: var(--danger);
    font-weight: 700;
}

.notice {
    margin-top: 24px;
    padding: 14px 16px;
    border-radius: var(--radius-small);
    background: var(--warning-soft);
    color: #755200;
    font-weight: 700;
}

.quiz-layout {
    display: grid;
    grid-template-columns: 260px minmax(0, 1fr);
    gap: 24px;
    align-items: start;
}

.sticky-panel {
    position: sticky;
    top: 98px;
    padding: 22px;
}

.progress-summary {
    margin: 18px 0 16px;
}

.progress-track {
    height: 10px;
    background: #e9eff7;
    border-radius: 999px;
    overflow: hidden;
}

.progress-track span {
    width: 0;
    height: 100%;
    display: block;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--primary), #5b9af7);
    transition: width 0.2s ease;
}

.question-nav {
    margin-top: 20px;
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 8px;
}

.question-nav button {
    aspect-ratio: 1;
    border: 1px solid var(--line);
    border-radius: 10px;
    color: var(--ink);
    background: #fff;
    cursor: pointer;
    font-weight: 800;
}

.question-nav button.answered {
    color: #fff;
    border-color: var(--primary);
    background: var(--primary);
}

.student-summary {
    margin-top: 24px;
    padding-top: 18px;
    border-top: 1px solid var(--line);
}

.student-summary span,
.student-summary small {
    display: block;
}

.student-summary span {
    font-weight: 800;
}

.student-summary small {
    color: var(--muted);
    margin-top: 2px;
}

.quiz-main {
    min-width: 0;
}

.quiz-heading-panel,
.passage-panel,
.question-card,
.submit-panel {
    padding: 26px;
}

.quiz-heading-panel,
.passage-panel,
.question-card {
    margin-bottom: 20px;
}

.passage-text {
    margin-top: 14px;
    white-space: pre-line;
    font-family: Georgia, "Times New Roman", serif;
    font-size: 1.08rem;
    line-height: 1.9;
}

.questions-stack {
    display: grid;
    gap: 18px;
}

.question-card {
    scroll-margin-top: 100px;
}

.question-number {
    color: var(--primary);
    font-weight: 900;
    font-size: 0.84rem;
    letter-spacing: 0.06em;
}

.question-prompt {
    margin: 5px 0 18px;
    font-size: 1.08rem;
    font-weight: 800;
}

.options-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.option-label {
    min-height: 58px;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    border: 1px solid var(--line);
    border-radius: 13px;
    background: #fff;
    cursor: pointer;
    transition: border 0.15s ease, background 0.15s ease, transform 0.15s ease;
}

.option-label:hover {
    transform: translateY(-1px);
    border-color: #9fbfee;
    background: #f8fbff;
}

.option-label input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.option-letter {
    width: 34px;
    height: 34px;
    flex: 0 0 34px;
    display: grid;
    place-items: center;
    border-radius: 10px;
    color: var(--primary);
    background: #eef5ff;
    font-weight: 900;
}

.option-label.selected {
    border-color: var(--primary);
    background: #f3f8ff;
    box-shadow: 0 0 0 3px rgba(31, 111, 235, 0.08);
}

.option-label.correct {
    border-color: #6bc18a;
    background: var(--success-soft);
}

.option-label.incorrect {
    border-color: #e59a9a;
    background: var(--danger-soft);
}

.submit-panel {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.submit-panel p {
    margin: 4px 0 0;
    color: var(--muted);
}

.result-layout {
    display: grid;
    grid-template-columns: 330px minmax(0, 1fr);
    gap: 26px;
    align-items: start;
}

.result-summary-card {
    position: sticky;
    top: 98px;
    padding: 28px;
    text-align: center;
}

.score-ring {
    width: 180px;
    height: 180px;
    margin: 24px auto;
    display: grid;
    place-content: center;
    border-radius: 50%;
    background: conic-gradient(var(--primary) var(--score-angle, 0deg), #e8eef6 0);
    position: relative;
}

.score-ring::before {
    content: "";
    position: absolute;
    inset: 14px;
    border-radius: 50%;
    background: #fff;
}

.score-ring strong,
.score-ring span {
    position: relative;
    z-index: 1;
    display: block;
}

.score-ring strong {
    font-size: 2rem;
}

.score-ring span {
    color: var(--muted);
}

.result-facts {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin: 24px 0;
}

.result-facts div {
    padding: 14px 10px;
    border-radius: 13px;
    background: var(--surface-soft);
}

.result-facts strong,
.result-facts span {
    display: block;
}

.result-facts strong {
    font-size: 1.25rem;
}

.result-facts span {
    color: var(--muted);
    font-size: 0.78rem;
}

.result-actions {
    justify-content: center;
}

.review-status {
    display: inline-flex;
    margin-top: 8px;
    padding: 5px 9px;
    border-radius: 999px;
    font-size: 0.76rem;
    font-weight: 900;
}

.review-status.correct {
    color: var(--success);
    background: var(--success-soft);
}

.review-status.incorrect {
    color: var(--danger);
    background: var(--danger-soft);
}

.explanation-box {
    margin-top: 18px;
    padding: 16px;
    border-left: 4px solid var(--primary);
    border-radius: 10px;
    background: #f4f8ff;
}

.explanation-box strong {
    display: block;
    margin-bottom: 5px;
}

.explanation-box p {
    margin: 0;
}

.site-footer {
    color: var(--muted);
    padding: 24px 0 34px;
    text-align: center;
    font-size: 0.88rem;
}

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

.admin-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.admin-table th,
.admin-table td {
    padding: 12px;
    border-bottom: 1px solid var(--line);
    text-align: left;
    vertical-align: top;
}

.admin-table th {
    color: var(--muted);
    background: var(--surface-soft);
}

.admin-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: end;
    gap: 12px;
    margin-bottom: 18px;
}

.admin-toolbar label span {
    display: block;
    margin-bottom: 5px;
    font-size: 0.8rem;
    font-weight: 800;
}

.admin-toolbar input,
.admin-toolbar select {
    min-height: 42px;
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 8px 10px;
    background: #fff;
}

@media (max-width: 960px) {
    .quiz-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .quiz-layout,
    .result-layout {
        grid-template-columns: 1fr;
    }

    .quiz-sidebar {
        order: -1;
    }

    .sticky-panel,
    .result-summary-card {
        position: static;
    }

    .sticky-panel {
        display: grid;
        grid-template-columns: 160px 1fr;
        gap: 18px;
        align-items: center;
    }

    .question-nav {
        margin-top: 0;
        grid-template-columns: repeat(10, minmax(34px, 1fr));
    }

    .student-summary {
        grid-column: 1 / -1;
        margin-top: 0;
    }
}

@media (max-width: 680px) {
    .shell {
        width: min(100% - 20px, 1180px);
    }

    .page-space,
    .quiz-page {
        padding-top: 20px;
    }

    .header-link,
    .brand small {
        display: none;
    }

    .hero-card,
    .quiz-title-row,
    .submit-panel {
        align-items: stretch;
        flex-direction: column;
    }

    .hero-card {
        padding: 26px;
    }

    .hero-stat {
        width: 120px;
        min-width: 120px;
        min-height: 120px;
    }

    .quiz-grid,
    .student-form,
    .options-grid {
        grid-template-columns: 1fr;
    }

    .loading-panel,
    .error-panel,
    .start-panel,
    .quiz-heading-panel,
    .passage-panel,
    .question-card,
    .submit-panel,
    .result-summary-card {
        padding: 20px;
    }

    .sticky-panel {
        display: block;
    }

    .question-nav {
        margin-top: 18px;
        grid-template-columns: repeat(5, 1fr);
    }

    .submit-panel .button {
        width: 100%;
    }

    .quiz-title-row .mode-badge {
        align-self: flex-start;
    }
}

/* ===== V2 catalog / admin extensions ===== */
.shell {
    width: 90%;
    max-width: none;
}

.catalog-layout {
    display: grid !important;
    grid-template-columns: minmax(0, 1fr) minmax(0, 4fr) !important;
    gap: 24px;
    align-items: start;
}

.catalog-sidebar,
.catalog-content {
    min-width: 0;
    width: 100%;
}

.directory-panel {
    position: sticky;
    top: 98px;
    padding: 20px;
}

.directory-heading h2 {
    margin: 4px 0 14px;
    font-size: 1.15rem;
}

.directory-home,
.directory-link {
    display: flex;
    align-items: center;
    gap: 8px;
    min-height: 40px;
    border-radius: 10px;
    padding: 8px 10px;
    text-decoration: none;
    color: var(--ink);
    font-weight: 750;
}

.directory-home {
    margin-bottom: 5px;
}

.directory-home:hover,
.directory-link:hover,
.directory-home.is-active,
.directory-link.is-active {
    color: var(--primary);
    background: #eef5ff;
}

.directory-tree {
    margin: 0;
    padding: 0;
    list-style: none;
}

.directory-tree .directory-tree {
    margin-left: 14px;
    padding-left: 10px;
    border-left: 1px solid var(--line);
}

.directory-icon {
    color: var(--primary);
    font-size: 0.8rem;
}

.catalog-heading {
    min-height: 126px;
    margin-bottom: 22px;
    padding: 26px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    border: 1px solid rgba(220, 229, 240, 0.92);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow);
}

.catalog-heading h1 {
    margin: 4px 0 7px;
    line-height: 1.2;
    letter-spacing: -0.03em;
    font-size: clamp(1.6rem, 3vw, 2.5rem);
}

.catalog-heading p {
    margin: 0;
    color: var(--muted);
}

.catalog-total {
    min-width: 92px;
    text-align: center;
    padding: 13px;
    border-radius: 16px;
    color: var(--primary);
    background: #eef5ff;
}

.catalog-total strong,
.catalog-total span {
    display: block;
}

.catalog-total strong {
    font-size: 1.7rem;
    line-height: 1;
}

.catalog-total span {
    margin-top: 5px;
    font-size: 0.76rem;
    color: var(--muted);
}

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

.category-card {
    min-height: 142px;
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 14px;
    padding: 22px;
    border: 1px solid rgba(220, 229, 240, 0.92);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow);
    text-decoration: none;
    transition: transform .16s ease, border-color .16s ease;
}

.category-card:hover {
    transform: translateY(-2px);
    border-color: #a9c7f3;
}

.category-card h2 {
    margin: 0 0 4px;
    font-size: 1.22rem;
}

.category-card p {
    margin: 0;
    color: var(--muted);
}

.category-folder {
    width: 46px;
    height: 46px;
    display: grid;
    place-items: center;
    border-radius: 13px;
    color: var(--primary);
    background: #eef5ff;
    font-size: 1.35rem;
}

.category-arrow {
    color: var(--primary);
    font-weight: 900;
    font-size: 1.3rem;
}

.quiz-list {
    display: grid;
    gap: 14px;
}

.quiz-list-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 22px;
    padding: 22px 24px;
    border: 1px solid rgba(220, 229, 240, 0.92);
    border-radius: 16px;
    background: var(--surface);
    box-shadow: 0 10px 30px rgba(29, 64, 112, 0.07);
}

.quiz-list-main {
    min-width: 0;
}

.quiz-list-item h2 {
    margin: 8px 0 5px;
    font-size: 1.25rem;
}

.quiz-list-item p {
    margin: 0;
    color: var(--muted);
}

.quiz-list-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px 10px;
    color: var(--muted);
    font-size: .8rem;
}

.catalog-empty {
    box-shadow: none;
}

/* Generic question types */
.text-answer-input {
    width: 100%;
    min-height: 52px;
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 12px 14px;
    outline: none;
}

.text-answer-input:focus,
.match-select:focus,
.order-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(31,111,235,.10);
}

.matching-grid,
.ordering-grid {
    display: grid;
    gap: 10px;
}

.matching-row,
.ordering-row {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(160px, 1fr);
    gap: 12px;
    align-items: center;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: #fff;
}

.match-select,
.order-select {
    width: 100%;
    min-height: 44px;
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 8px 10px;
    background: #fff;
}

.review-answer-box {
    margin-top: 12px;
    padding: 12px 14px;
    border-radius: 12px;
    background: var(--surface-soft);
}

.review-answer-box strong,
.review-answer-box span {
    display: block;
}

.review-answer-box span {
    margin-top: 3px;
    color: var(--muted);
}

/* Admin layout */
.admin-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.admin-nav a {
    padding: 8px 11px;
    border-radius: 10px;
    text-decoration: none;
    color: var(--muted);
    font-weight: 800;
}

.admin-nav a:hover,
.admin-nav a.is-active {
    color: var(--primary);
    background: #eef5ff;
}

.admin-form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.admin-form-grid .wide {
    grid-column: 1 / -1;
}

.admin-field span {
    display: block;
    margin-bottom: 6px;
    font-size: .82rem;
    font-weight: 800;
}

.admin-field input,
.admin-field select,
.admin-field textarea {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 10px 12px;
    background: #fff;
}

.admin-field input,
.admin-field select {
    min-height: 44px;
}

.admin-field textarea {
    min-height: 120px;
    resize: vertical;
    font: inherit;
}

.code-editor {
    min-height: 420px !important;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace !important;
    font-size: .86rem !important;
    line-height: 1.55;
    tab-size: 2;
}

.admin-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 18px;
}

.note-form {
    min-width: 220px;
}

.note-form textarea {
    width: 100%;
    min-height: 66px;
    border: 1px solid var(--line);
    border-radius: 9px;
    padding: 8px;
    resize: vertical;
}

.note-form .button {
    margin-top: 6px;
    min-height: 36px;
    padding: 7px 10px;
    font-size: .8rem;
}

@media (max-width: 1050px) {
    /* Keep the requested desktop 1:4 split and 3-column category grid. */
    .catalog-layout {
        grid-template-columns: minmax(0, 1fr) minmax(0, 4fr) !important;
    }
    .category-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (max-width: 620px) {
    .shell {
        width: calc(100% - 20px);
    }
    .catalog-layout {
        grid-template-columns: 1fr !important;
        gap: 16px;
    }
    .directory-panel {
        position: static;
    }
    .directory-tree {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 4px;
    }
    .directory-tree .directory-tree {
        grid-column: 1 / -1;
        display: block;
    }
    .category-grid,
    .admin-form-grid {
        grid-template-columns: 1fr;
    }
    .catalog-heading,
    .quiz-list-item {
        align-items: stretch;
        flex-direction: column;
    }
    .quiz-list-item .button {
        width: 100%;
    }
    .matching-row,
    .ordering-row {
        grid-template-columns: 1fr;
    }
}

.quiz-overview-card {
    padding: 28px;
}

.quiz-overview-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 9px 12px;
    color: var(--muted);
    font-size: .88rem;
}

.overview-note {
    margin: 20px 0 0;
    padding: 12px 14px;
    border-radius: 12px;
    background: var(--surface-soft);
    color: var(--muted);
}

.overview-student-form {
    max-width: 760px;
}

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

.result-detail-grid > div {
    padding: 14px;
    border-radius: 12px;
    background: var(--surface-soft);
}

.result-detail-grid span,
.result-detail-grid strong {
    display: block;
}

.result-detail-grid span {
    color: var(--muted);
    font-size: .78rem;
}

.result-note-form {
    margin-top: 20px;
    max-width: 720px;
}

@media (max-width: 760px) {
    .result-detail-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 760px) {
    .site-header .header-inner {
        flex-wrap: wrap;
        padding-block: 8px;
    }
    .admin-nav {
        order: 3;
        width: 100%;
        flex-wrap: nowrap;
        overflow-x: auto;
        padding-bottom: 2px;
    }
    .admin-nav a {
        white-space: nowrap;
    }
}

/* ===== V2.1 SQL editor refinements ===== */
.admin-nav {
    gap: 12px;
}

.admin-nav a {
    min-height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--line);
    background: #fff;
    box-shadow: 0 5px 14px rgba(29, 64, 112, 0.05);
}

.admin-nav a:hover,
.admin-nav a.is-active {
    border-color: #b9d1f5;
    background: #eef5ff;
}

.admin-editor-panel {
    padding: 24px;
    margin-bottom: 20px;
}

.admin-editor-panel h2 {
    margin: 5px 0 18px;
}

.admin-form-stack {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

.admin-form-stack .admin-field,
.question-editor .admin-field {
    display: block;
    width: 100%;
}

.settings-stack {
    display: grid;
    gap: 10px;
}

.question-section-heading,
.question-editor-heading {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
}

.question-section-heading p {
    margin: 5px 0 0;
    color: var(--muted);
}

.questions-editor {
    display: grid;
    gap: 18px;
    margin-top: 20px;
}

.question-editor {
    padding: 20px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: var(--surface-soft);
}

.question-editor h3 {
    margin: 2px 0 16px;
}

.question-editor > .admin-field,
.question-specific .admin-field {
    margin-top: 14px;
}

.question-specific[hidden] {
    display: none !important;
}

.admin-save-bar {
    position: sticky;
    bottom: 12px;
    z-index: 20;
    padding: 12px;
    border: 1px solid rgba(220, 229, 240, 0.94);
    border-radius: 14px;
    background: rgba(255,255,255,.94);
    box-shadow: 0 14px 35px rgba(29,64,112,.12);
    backdrop-filter: blur(10px);
}

@media (max-width: 760px) {
    .question-section-heading,
    .question-editor-heading {
        flex-direction: column;
    }

    .question-section-heading .button,
    .question-editor-heading .button {
        width: 100%;
    }
}

/* v2.3 - admin test import module */
.import-help {
    margin-top: 20px;
    padding: 16px 18px;
    border-radius: 14px;
    background: #f7faff;
    color: var(--muted);
    line-height: 1.6;
}

.import-status {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 72px;
    padding: 5px 9px;
    border-radius: 999px;
    font-size: 0.72rem;
    font-weight: 900;
    letter-spacing: 0.04em;
    background: #eef2f7;
    color: #344054;
}

.import-status.is-ready,
.import-status.is-imported {
    background: #eaf8ef;
    color: #187a3b;
}

.import-status.is-existing,
.import-status.is-skipped {
    background: #fff6df;
    color: #8a5b00;
}

.import-status.is-replaced {
    background: #edf3ff;
    color: #2457b6;
}

.import-status.is-failed {
    background: #fff0f0;
    color: #b42318;
}

.import-warning {
    margin-top: 0;
}

.import-result-panel {
    margin-bottom: 24px;
}