/* Assessment builder and session */

.exam-builder-overlay {
    position: fixed;
    inset: 0;
    display: grid;
    place-items: center;
    padding: 22px;
    background: rgba(15, 23, 42, 0.2);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.24s ease, visibility 0s linear 0.24s;
    z-index: 120;
}

.exam-builder-overlay.open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transition-delay: 0s;
}

.exam-builder-modal {
    width: min(980px, 100%);
    max-height: min(88vh, 920px);
    overflow: auto;
    padding: 28px;
    border-radius: 34px;
    background: linear-gradient(180deg, rgba(255,255,255,0.97), rgba(245,248,252,0.94));
    border: 1px solid rgba(255, 255, 255, 0.76);
    box-shadow: 0 40px 90px rgba(15, 23, 42, 0.18);
    transform: translateY(22px) scale(0.98);
    transition: transform 0.28s cubic-bezier(0.22, 1, 0.36, 1);
}

.exam-builder-overlay.open .exam-builder-modal {
    transform: translateY(0) scale(1);
}

.exam-builder-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 18px;
}

.exam-builder-head h3 {
    margin: 10px 0 0;
    font-size: clamp(30px, 4vw, 44px);
    line-height: 0.98;
    letter-spacing: -0.06em;
}

.exam-builder-head p {
    margin: 12px 0 0;
    max-width: 650px;
    color: var(--muted-strong);
    font-size: 15px;
    line-height: 1.55;
}

.exam-builder-mode-tabs {
    display: inline-flex;
    gap: 8px;
    padding: 6px;
    border-radius: 999px;
    background: rgba(255,255,255,0.8);
    border: 1px solid rgba(15, 23, 42, 0.06);
}

.exam-builder-mode-tab {
    padding: 11px 16px;
    border-radius: 999px;
    border: none;
    background: transparent;
    color: var(--muted-strong);
    font-size: 14px;
    font-weight: 700;
    box-shadow: none;
}

.exam-builder-mode-tab.active {
    background: linear-gradient(180deg, rgba(20,145,255,0.16), rgba(0,119,237,0.1));
    color: var(--accent-strong);
}

.exam-builder-panel {
    display: none;
    margin-top: 18px;
}

.exam-builder-panel.active {
    display: grid;
    gap: 18px;
}

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

.exam-builder-card {
    padding: 22px;
    border-radius: 26px;
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(15, 23, 42, 0.06);
    box-shadow: var(--shadow-md);
}

.exam-builder-card h4 {
    margin: 10px 0 8px;
    font-size: 22px;
    letter-spacing: -0.04em;
}

.exam-builder-card p {
    margin: 0;
    color: var(--muted);
    font-size: 14px;
    line-height: 1.6;
}

.exam-builder-card .field-grid + .toggle-row {
margin-top: 24px;
}

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

.exam-section-row {
    display: grid;
    grid-template-columns: minmax(0, 2.1fr) minmax(120px, 0.8fr) 52px;
    gap: 12px;
    align-items: center;
}

.delete-chip {
    width: 52px;
    min-width: 52px;
    border-radius: 16px;
    background: rgba(255, 69, 58, 0.08);
    color: #b14a43;
    box-shadow: none;
}

.exam-builder-warning {
    margin-top: 16px;
    padding: 14px 16px;
    border-radius: 18px;
    background: rgba(255, 244, 214, 0.64);
    border: 1px solid rgba(255, 159, 10, 0.16);
    color: #8b5a00;
    font-size: 13px;
    line-height: 1.5;
}

.exam-balance-copy {
    margin-top: 10px;
    color: var(--muted);
    font-size: 14px;
    line-height: 1.55;
}

.exam-balance-grid {
    margin-top: 16px;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

.exam-balance-stat {
    padding: 14px;
    border-radius: 18px;
    background: rgba(248, 250, 252, 0.9);
    border: 1px solid rgba(15, 23, 42, 0.05);
}

.exam-balance-stat strong {
    display: block;
    font-size: 20px;
    letter-spacing: -0.03em;
}

.exam-balance-stat span {
    display: block;
    margin-top: 4px;
    color: var(--muted);
    font-size: 12px;
}

.timed-estimate {
    margin-top: 12px;
    padding: 12px 14px;
    border-radius: 16px;
    background: rgba(248, 250, 252, 0.9);
    border: 1px solid rgba(15, 23, 42, 0.05);
    color: var(--muted-strong);
    font-size: 13px;
    font-weight: 600;
    line-height: 1.5;
}

.toggle-row + .timed-estimate {
    margin-top: 24px;
}

.timed-estimate + .module-card-actions {
    margin-top: 24px;
}

.exam-builder-preview {
    display: none;
    padding: 22px;
    border-radius: 26px;
    background: rgba(255,255,255,0.86);
    border: 1px solid rgba(15, 23, 42, 0.06);
    box-shadow: var(--shadow-md);
}

.exam-builder-preview.show {
    display: block;
    animation: examPreviewIn 0.34s cubic-bezier(0.22, 1, 0.36, 1);
}

.template-save-row {
    margin-top: 18px;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
}

.template-save-controls {
    display: none;
    grid-template-columns: minmax(220px, 320px) auto;
    gap: 10px;
    align-items: end;
}

.template-save-controls.show {
    display: grid;
}

.saved-template-card {
    padding: 18px;
    border-radius: 22px;
    background: rgba(255,255,255,0.78);
    border: 1px solid rgba(15, 23, 42, 0.06);
    box-shadow: var(--shadow-md);
}

.saved-template-list {
    margin-top: 14px;
    display: grid;
    gap: 10px;
}

.saved-template-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    padding: 14px 16px;
    border-radius: 18px;
    background: rgba(248, 250, 252, 0.9);
    border: 1px solid rgba(15, 23, 42, 0.05);
    transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.saved-template-item:hover {
    transform: translateY(-1px);
    box-shadow: 0 14px 28px rgba(15, 23, 42, 0.08);
}

.saved-template-copy strong {
    display: block;
    font-size: 15px;
    letter-spacing: -0.02em;
}

.saved-template-copy span {
    display: block;
    margin-top: 4px;
    color: var(--muted);
    font-size: 12px;
}

.saved-template-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.saved-template-load {
    box-shadow: none;
}

.preview-list,
.preview-meta {
    display: grid;
    gap: 10px;
}

.preview-meta {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin-top: 14px;
}

.preview-pill {
    padding: 14px;
    border-radius: 18px;
    background: rgba(248, 250, 252, 0.9);
    border: 1px solid rgba(15, 23, 42, 0.05);
}

.preview-pill strong {
    display: block;
    font-size: 20px;
    letter-spacing: -0.03em;
}

.preview-pill span {
    display: block;
    margin-top: 4px;
    color: var(--muted);
    font-size: 12px;
}

.preview-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    padding: 14px 16px;
    border-radius: 18px;
    background: rgba(248, 250, 252, 0.9);
    border: 1px solid rgba(15, 23, 42, 0.05);
}

.preview-item span:last-child {
    color: var(--muted-strong);
    font-weight: 700;
}

.preview-warning {
    margin-top: 14px;
    padding: 14px 16px;
    border-radius: 18px;
    background: rgba(255, 244, 214, 0.56);
    border: 1px solid rgba(255, 159, 10, 0.14);
    color: #8b5a00;
    font-size: 13px;
    line-height: 1.5;
}

#hoad-assessment-session .hoad-assessment-head {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
}

#hoad-assessment-session .hoad-assessment-pill,
#hoad-assessment-session .hoad-assessment-badge {
    display: inline-flex;
    align-items: center;
    padding: 8px 12px;
    border-radius: 999px;
    background: rgba(248, 250, 252, 0.9);
    border: 1px solid rgba(15, 23, 42, 0.05);
    color: #475569;
    font-size: 12px;
    font-weight: 700;
}

#hoad-assessment-session .hoad-assessment-badges {
    margin-top: 14px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

#hoad-assessment-session .hoad-assessment-question {
    margin: 18px 0 0;
    font-size: 21px;
    line-height: 1.55;
    letter-spacing: -0.02em;
    color: #111827;
}

#hoad-assessment-session .hoad-assessment-choices {
    margin-top: 18px;
    display: grid;
    gap: 12px;
}

#hoad-assessment-session .hoad-assessment-choice {
    width: 100%;
    text-align: left;
    background: rgba(255,255,255,0.94);
    color: #111827;
    border: 1px solid rgba(15, 23, 42, 0.07);
    padding: 16px 18px;
    border-radius: 18px;
    font-size: 16px;
    font-weight: 600;
    line-height: 1.5;
    transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

#hoad-assessment-session .hoad-assessment-choice:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 12px 22px rgba(15, 23, 42, 0.08);
    border-color: rgba(10, 132, 255, 0.18);
}

#hoad-assessment-session .hoad-assessment-choice.is-selected {
    background: linear-gradient(180deg, rgba(239,246,255,0.98), rgba(229,239,255,0.92));
    border-color: rgba(10, 132, 255, 0.24);
    color: #0f3d91;
    box-shadow: 0 12px 22px rgba(10, 132, 255, 0.08);
}

#hoad-assessment-session .hoad-assessment-choice:disabled {
    cursor: default;
    opacity: 1;
}

#hoad-assessment-session .hoad-assessment-choice.is-correct {
    background: linear-gradient(180deg, rgba(236, 253, 245, 0.98), rgba(220, 252, 231, 0.92));
    border-color: rgba(34, 197, 94, 0.22);
    color: #166534;
}

#hoad-assessment-session .hoad-assessment-choice.is-wrong {
    background: linear-gradient(180deg, rgba(255, 241, 242, 0.98), rgba(255, 228, 230, 0.92));
    border-color: rgba(239, 68, 68, 0.22);
    color: #991b1b;
}

#hoad-assessment-session .hoad-assessment-feedback {
    margin-top: 18px;
    display: grid;
    gap: 12px;
}

#hoad-assessment-session .hoad-assessment-feedback-card {
    padding: 16px 18px;
    border-radius: 18px;
    background: rgba(255,255,255,0.88);
    border: 1px solid rgba(15, 23, 42, 0.05);
}

#hoad-assessment-session .hoad-assessment-feedback-card strong {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    color: #1f2937;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

#hoad-assessment-session .hoad-assessment-feedback-card p {
    margin: 0;
    font-size: 16px;
    line-height: 1.6;
    color: #334155;
}

#hoad-assessment-session .hoad-assessment-nav {
    margin-top: 18px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

#hoad-assessment-session .hoad-assessment-nav-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

#hoad-assessment-session .hoad-assessment-arrow,
#hoad-assessment-session .hoad-assessment-submit,
#hoad-assessment-session .hoad-assessment-reset,
#hoad-assessment-session .hoad-assessment-restart {
    width: auto;
    min-width: 126px;
    padding: 14px 20px;
}

#hoad-assessment-session .hoad-assessment-arrow {
    min-width: 54px;
    padding: 14px 16px;
    border-radius: 18px;
}

#hoad-assessment-session .hoad-assessment-submit[disabled] {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

#hoad-assessment-session .hoad-assessment-reset {
    background: rgba(255,255,255,0.9);
    color: #334155;
    border: 1px solid rgba(15, 23, 42, 0.08);
    box-shadow: none;
}

#hoad-assessment-session .hoad-assessment-empty {
    margin-top: 14px;
    padding: 14px 16px;
    border-radius: 18px;
    background: rgba(248, 250, 252, 0.9);
    border: 1px solid rgba(15, 23, 42, 0.05);
    color: #475569;
    font-size: 14px;
    line-height: 1.6;
}

#hoad-assessment-session .hoad-assessment-summary {
    text-align: center;
}

#hoad-assessment-session .hoad-assessment-summary-score {
    margin: 18px 0 0;
    font-size: 42px;
    font-weight: 850;
    letter-spacing: -0.05em;
    color: #111827;
}

#assessment-session-page .hoad-assessment-head {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
}

#assessment-session-page .hoad-assessment-pill,
#assessment-session-page .hoad-assessment-badge {
    display: inline-flex;
    align-items: center;
    padding: 8px 12px;
    border-radius: 999px;
    background: rgba(248, 250, 252, 0.9);
    border: 1px solid rgba(15, 23, 42, 0.05);
    color: #475569;
    font-size: 12px;
    font-weight: 700;
}

#assessment-session-page .hoad-assessment-badges {
    margin-top: 14px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

#assessment-session-page .hoad-assessment-question {
    margin: 18px 0 0;
    font-size: 21px;
    line-height: 1.55;
    letter-spacing: -0.02em;
    color: #111827;
}

#assessment-session-page .arena-question-meta {
    margin-top: 10px;
}

#assessment-session-page .arena-difficulty-chip {
    display: inline-flex;
    align-items: center;
    width: fit-content;
    padding: 5px 9px;
    border-radius: 999px;
    background: rgba(248, 250, 252, 0.95);
    border: 1px solid rgba(15, 23, 42, 0.06);
    color: #64748b;
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

#assessment-session-page .hoad-assessment-choices {
    margin-top: 18px;
    display: grid;
    gap: 12px;
}

#assessment-session-page .hoad-assessment-choice {
    width: 100%;
    text-align: left;
    background: rgba(255,255,255,0.94);
    color: #111827;
    border: 1px solid rgba(15, 23, 42, 0.07);
    padding: 16px 18px;
    border-radius: 18px;
    font-size: 16px;
    font-weight: 600;
    line-height: 1.5;
    transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

#assessment-session-page .hoad-assessment-choice:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 12px 22px rgba(15, 23, 42, 0.08);
    border-color: rgba(10, 132, 255, 0.18);
}

#assessment-session-page .hoad-assessment-choice.is-selected {
    background: linear-gradient(180deg, rgba(239,246,255,0.98), rgba(229,239,255,0.92));
    border-color: rgba(10, 132, 255, 0.24);
    color: #0f3d91;
    box-shadow: 0 12px 22px rgba(10, 132, 255, 0.08);
}

#assessment-session-page .hoad-assessment-choice:disabled {
    cursor: default;
    opacity: 1;
}

#assessment-session-page .hoad-assessment-choice.is-correct {
    background: linear-gradient(180deg, rgba(236, 253, 245, 0.98), rgba(220, 252, 231, 0.92));
    border-color: rgba(34, 197, 94, 0.22);
    color: #166534;
}

#assessment-session-page .hoad-assessment-choice.is-wrong {
    background: linear-gradient(180deg, rgba(255, 241, 242, 0.98), rgba(255, 228, 230, 0.92));
    border-color: rgba(239, 68, 68, 0.22);
    color: #991b1b;
}

#assessment-session-page .hoad-assessment-feedback {
    margin-top: 18px;
    display: grid;
    gap: 12px;
}

#assessment-session-page .hoad-assessment-feedback-card {
    padding: 16px 18px;
    border-radius: 18px;
    background: rgba(255,255,255,0.88);
    border: 1px solid rgba(15, 23, 42, 0.05);
}

#assessment-session-page .hoad-assessment-feedback-card strong {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    color: #1f2937;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

#assessment-session-page .hoad-assessment-feedback-card p {
    margin: 0;
    font-size: 16px;
    line-height: 1.6;
    color: #334155;
}

#assessment-session-page .hoad-assessment-nav {
    margin-top: 18px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

#assessment-session-page .hoad-assessment-nav-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

#assessment-session-page .hoad-assessment-arrow,
#assessment-session-page .hoad-assessment-submit,
#assessment-session-page .hoad-assessment-reset,
#assessment-session-page .hoad-assessment-restart {
    width: auto;
    min-width: 126px;
    padding: 14px 20px;
}

#assessment-session-page .hoad-assessment-arrow {
    min-width: 54px;
    padding: 14px 16px;
    border-radius: 18px;
}

#assessment-session-page .hoad-assessment-submit[disabled] {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

#assessment-session-page .hoad-assessment-reset {
    background: rgba(255,255,255,0.9);
    color: #334155;
    border: 1px solid rgba(15, 23, 42, 0.08);
    border-radius: 999px;
    box-shadow: none;
}

#assessment-session-page .hoad-assessment-empty {
    margin-top: 14px;
    padding: 14px 16px;
    border-radius: 18px;
    background: rgba(248, 250, 252, 0.9);
    border: 1px solid rgba(15, 23, 42, 0.05);
    color: #475569;
    font-size: 14px;
    line-height: 1.6;
}

#assessment-session-page .hoad-assessment-summary {
    text-align: center;
}

#assessment-session-page .hoad-assessment-summary-score {
    margin: 18px 0 0;
    font-size: 42px;
    font-weight: 850;
    letter-spacing: -0.05em;
    color: #111827;
}

.assessment-session-page {
    position: fixed;
    inset: 0;
    z-index: 1300;
    display: none;
    background:
        radial-gradient(circle at top left, rgba(10, 132, 255, 0.08), transparent 26%),
        linear-gradient(180deg, #f8fafc 0%, #eef2f7 100%);
    overflow: auto;
}

.assessment-session-page.show {
    display: block;
    animation: fadeIn 0.24s ease;
}

.assessment-session-shell {
    min-height: 100vh;
    padding: 28px;
}

.assessment-session-topbar {
    display: grid;
    grid-template-columns: minmax(0, 1.3fr) auto auto;
    align-items: center;
    gap: 18px;
    padding: 20px 22px;
    border-radius: 28px;
    background: rgba(255,255,255,0.92);
    border: 1px solid rgba(15, 23, 42, 0.06);
    box-shadow: 0 22px 50px rgba(15, 23, 42, 0.1);
}

.arena-topbar-copy h3 {
    margin: 6px 0 0;
    font-size: clamp(34px, 5vw, 46px);
    line-height: 0.98;
    letter-spacing: -0.06em;
}

.assessment-session-topbar p {
    margin: 8px 0 0;
    color: var(--muted);
    font-size: 15px;
    line-height: 1.55;
}

.arena-topbar-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.arena-topbar-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 14px;
    border-radius: 999px;
    background: rgba(248, 250, 252, 0.96);
    border: 1px solid rgba(15, 23, 42, 0.06);
    color: #334155;
    font-size: 13px;
    font-weight: 700;
}

.assessment-session-close {
    flex: 0 0 auto;
    width: auto;
}

#assessment-arena {
    margin-top: 22px;
    display: grid;
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 22px;
}

.arena-sidebar,
.arena-question-panel,
.arena-summary-card {
    border-radius: 28px;
    background: rgba(255,255,255,0.92);
    border: 1px solid rgba(15, 23, 42, 0.06);
    box-shadow: 0 18px 42px rgba(15, 23, 42, 0.08);
}

.arena-sidebar {
    padding: 22px 18px;
    align-self: start;
    position: sticky;
    top: 24px;
}

.arena-sidebar h4 {
    margin: 8px 0 0;
    font-size: 20px;
    letter-spacing: -0.03em;
}

.arena-sidebar-copy {
    margin-top: 8px;
    color: var(--muted);
    font-size: 13px;
    line-height: 1.55;
}

.arena-sidebar-grid {
    margin-top: 18px;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
}

.arena-nav-button {
    width: 100%;
    min-width: 0;
    padding: 12px 0;
    border-radius: 16px;
    background: rgba(248, 250, 252, 0.95);
    border: 1px solid rgba(15, 23, 42, 0.06);
    color: #475569;
    font-size: 14px;
    font-weight: 800;
    box-shadow: none;
}

.arena-nav-button.is-current {
    background: linear-gradient(180deg, rgba(239,246,255,0.98), rgba(229,239,255,0.92));
    border-color: rgba(10, 132, 255, 0.22);
    color: #0f3d91;
    box-shadow: 0 12px 24px rgba(10, 132, 255, 0.1);
}

.arena-nav-button.is-submitted {
    border-color: rgba(148, 163, 184, 0.28);
}

.arena-nav-button.is-correct {
    background: linear-gradient(180deg, rgba(236, 253, 245, 0.98), rgba(220, 252, 231, 0.92));
    border-color: rgba(34, 197, 94, 0.22);
    color: #166534;
}

.arena-nav-button.is-wrong {
    background: linear-gradient(180deg, rgba(255, 241, 242, 0.98), rgba(255, 228, 230, 0.92));
    border-color: rgba(239, 68, 68, 0.22);
    color: #991b1b;
}

.arena-sidebar-stats {
    margin-top: 18px;
    display: grid;
    gap: 10px;
}

.arena-sidebar-stat {
    padding: 14px;
    border-radius: 18px;
    background: rgba(248, 250, 252, 0.95);
    border: 1px solid rgba(15, 23, 42, 0.05);
}

.arena-sidebar-stat strong {
    display: block;
    font-size: 22px;
    letter-spacing: -0.04em;
}

.arena-sidebar-stat span {
    display: block;
    margin-top: 4px;
    color: var(--muted);
    font-size: 12px;
}

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

.arena-question-panel {
    padding: 26px;
}

.arena-panel-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
}

.arena-panel-head h4 {
    margin: 8px 0 0;
    font-size: 30px;
    letter-spacing: -0.05em;
}

.arena-feedback-status {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 14px;
    border-radius: 999px;
    background: rgba(248, 250, 252, 0.95);
    border: 1px solid rgba(15, 23, 42, 0.06);
    color: #475569;
    font-size: 13px;
    font-weight: 800;
}

.arena-feedback-status.is-correct {
    background: rgba(236, 253, 245, 0.98);
    border-color: rgba(34, 197, 94, 0.22);
    color: #166534;
}

.arena-feedback-status.is-wrong {
    background: rgba(255, 241, 242, 0.98);
    border-color: rgba(239, 68, 68, 0.22);
    color: #991b1b;
}

.arena-feedback {
    margin-top: 20px;
    display: grid;
    gap: 14px;
}

.arena-feedback-card {
    padding: 18px 20px;
    border-radius: 20px;
    background: rgba(248, 250, 252, 0.92);
    border: 1px solid rgba(15, 23, 42, 0.05);
}

.arena-feedback-card strong {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: #1f2937;
}

.arena-feedback-card p {
    margin: 0;
    font-size: 17px;
    line-height: 1.65;
    color: #334155;
}

.arena-summary-card {
    padding: 28px;
}

.arena-summary-card h4 {
    margin: 8px 0 0;
    font-size: 34px;
    letter-spacing: -0.05em;
}

.arena-summary-score {
    margin-top: 18px;
    font-size: clamp(42px, 7vw, 62px);
    font-weight: 850;
    letter-spacing: -0.06em;
    color: #111827;
}

.arena-summary-percent {
    margin-top: 8px;
    color: var(--muted);
    font-size: 16px;
}

.arena-summary-missed {
    margin-top: 22px;
    display: grid;
    gap: 10px;
}

.arena-summary-missed-item {
    padding: 14px 16px;
    border-radius: 18px;
    background: rgba(248, 250, 252, 0.95);
    border: 1px solid rgba(15, 23, 42, 0.05);
}

.arena-summary-missed-item strong {
    display: block;
    font-size: 14px;
    color: #111827;
}

.arena-summary-missed-item span {
    display: block;
    margin-top: 4px;
    color: var(--muted);
    font-size: 13px;
}

.arena-summary-actions {
    margin-top: 22px;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.arena-summary-actions .button {
    width: auto;
}

.quiz-save-overlay {
    position: fixed;
    inset: 0;
    z-index: 1250;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background: rgba(244, 247, 251, 0.58);
    backdrop-filter: blur(18px);
}

.quiz-save-overlay.show {
    display: flex;
    animation: fadeIn 0.22s ease;
}

.quiz-save-modal {
    width: min(460px, 100%);
    padding: 26px;
    border-radius: 28px;
    background: rgba(255,255,255,0.96);
    border: 1px solid rgba(15, 23, 42, 0.06);
    box-shadow: 0 28px 72px rgba(15, 23, 42, 0.16);
}

.quiz-save-modal h3 {
    margin: 0;
    font-size: 28px;
    letter-spacing: -0.04em;
}

.quiz-save-modal p {
    margin: 12px 0 0;
    color: var(--muted);
    font-size: 15px;
    line-height: 1.55;
}

.quiz-save-actions {
    margin-top: 22px;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.quiz-save-actions .button {
    width: auto;
}

.quiz-save-controls {
    display: none;
    margin-top: 18px;
    gap: 12px;
}

.quiz-save-controls.show {
    display: grid;
}

.quiz-save-note {
    margin-top: 12px;
    color: var(--muted);
    font-size: 13px;
}

@keyframes examPreviewIn {
    from {
        opacity: 0;
        transform: translateY(12px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 720px) {
    .assessment-session-page {
        overflow: auto;
    }

    .assessment-session-shell {
        padding: 18px 14px 28px;
    }

    .assessment-session-topbar {
        grid-template-columns: 1fr;
        align-items: flex-start;
    }

    .arena-topbar-meta {
        justify-content: flex-start;
    }

    #assessment-arena {
        grid-template-columns: 1fr;
    }

    .arena-sidebar {
        position: static;
        overflow: hidden;
    }

    .arena-sidebar-grid {
        grid-template-columns: repeat(10, minmax(64px, 64px));
        overflow-x: auto;
        padding-bottom: 4px;
    }

    .arena-question-panel {
        padding: 22px;
    }

    #assessment-session-page .hoad-assessment-nav {
        flex-direction: column;
        align-items: stretch;
    }

    #assessment-session-page .hoad-assessment-nav-group {
        justify-content: space-between;
    }

    .arena-summary-actions .button {
        width: 100%;
    }

    .quiz-save-modal {
        padding: 22px;
        border-radius: 24px;
    }

    .quiz-save-actions {
        flex-direction: column;
    }

    .quiz-save-actions .button {
        width: 100%;
    }
}

.exam-builder-modal .icon-button,
.exam-builder-modal .exam-builder-mode-tab,
.exam-builder-modal .delete-chip {
    box-shadow: none;
}

.exam-builder-modal .icon-button {
    padding: 0;
    background: rgba(255,255,255,0.78);
    color: var(--muted-strong);
}

.exam-builder-modal .exam-builder-mode-tab {
    background: transparent;
    color: var(--muted-strong);
}

.exam-builder-modal .exam-builder-mode-tab.active {
    background: linear-gradient(180deg, rgba(20,145,255,0.16), rgba(0,119,237,0.1));
    color: var(--accent-strong);
}

.exam-builder-modal .delete-chip {
    padding: 0;
    background: rgba(255, 69, 58, 0.08);
    color: #b14a43;
}

@media (max-width: 820px) {
    .exam-builder-grid,
    .preview-meta,
    .exam-balance-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 700px) {
    .exam-builder-modal {
        padding: 22px;
    }

    .exam-builder-head {
        flex-direction: column;
    }

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

/* Question image — click-to-expand thumbnail + lightbox */
.hoad-question-figure {
    margin: 16px 0 0;
    padding: 0;
}

.hoad-question-figure-btn {
    position: relative;
    display: inline-block;
    max-width: min(420px, 100%);
    padding: 8px;
    border: 1px solid rgba(15, 23, 42, 0.12);
    border-radius: 16px;
    background: #fff;
    cursor: zoom-in;
    box-shadow: 0 8px 22px rgba(15, 23, 42, 0.08);
    transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.hoad-question-figure-btn:hover,
.hoad-question-figure-btn:focus-visible {
    transform: translateY(-2px);
    border-color: var(--accent, #0ea5a4);
    box-shadow: 0 14px 30px rgba(15, 23, 42, 0.16);
    outline: none;
}

.hoad-question-figure-btn img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 10px;
}

.hoad-question-figure-hint {
    position: absolute;
    right: 14px;
    bottom: 14px;
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.02em;
    color: #fff;
    background: rgba(15, 23, 42, 0.72);
    pointer-events: none;
}

.hoad-image-lightbox[hidden] {
    display: none;
}

.hoad-image-lightbox {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: grid;
    place-items: center;
    padding: 32px;
}

.hoad-image-lightbox-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.78);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    cursor: zoom-out;
}

.hoad-image-lightbox-inner {
    position: relative;
    max-width: min(1100px, 96vw);
    max-height: 92vh;
}

.hoad-image-lightbox-inner img {
    display: block;
    max-width: 100%;
    max-height: 92vh;
    width: auto;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 30px 70px rgba(0, 0, 0, 0.45);
    background: #fff;
}

.hoad-image-lightbox-x {
    position: absolute;
    top: -16px;
    right: -16px;
    width: 40px;
    height: 40px;
    border-radius: 999px;
    border: none;
    background: #fff;
    color: #111827;
    font-size: 24px;
    line-height: 1;
    cursor: pointer;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

.hoad-image-lightbox-x:hover,
.hoad-image-lightbox-x:focus-visible {
    background: var(--accent, #0ea5a4);
    color: #fff;
    outline: none;
}

@media (max-width: 720px) {
    .hoad-image-lightbox-x {
        top: 8px;
        right: 8px;
    }
}