/* Cambridge Exam Runner Styles - Official Computer-Based Exam Specification */
:root {
    --cb-navy: #002e5f;
    --cb-navy-hover: #001f42;
    --cb-navy-light: #e6edf5;
    --cb-primary: #002e5f;
    --cb-primary-dark: #001f42;
    --cb-primary-light: #e6edf5;
    --cb-teal: #0d9488;
    --cb-teal-hover: #0f766e;
    --cb-teal-light: #f0fdfa;
    --cb-bg: #f4f6f8;
    --cb-surface: #ffffff;
    --cb-text: #1e293b;
    --cb-muted: #64748b;
    --cb-border: #cbd5e1;
    --cb-border-dark: #94a3b8;
    --cb-line: #cbd5e1;
    --cb-active-ring: #38bdf8;
    --cb-green: #15803d;
    --cb-green-light: #f0fdf4;
    --cb-correct: #15803d;
    --cb-correct-bg: #f0fdf4;
    --cb-red: #b91c1c;
    --cb-incorrect: #b91c1c;
    --cb-incorrect-bg: #fef2f2;
    --cb-amber: #b45309;
    --cb-amber-light: #fffbeb;
    --cb-radius: 4px;
    --cb-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
}

/* Exam Workspace Container (Full-screen view swapped with dashboard) */
#exam-workspace {
    width: 100%;
    min-height: 100%;
    height: 100%;
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--cb-bg);
    color: var(--cb-text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    position: relative;
    box-sizing: border-box;
}

/* Full-height chain from the page down to the exam workspace, so the bottom bar can pin to the viewport bottom */
#exam-workspace-view {
    display: flex;
    flex-direction: column;
    flex: 1;
}

body.in-exam main {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* 1. TOP UTILITY BAR (Official Cambridge Top Bar) */
.cb-top-bar {
    position: sticky;
    top: 0;
    z-index: 50;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.65rem 1.25rem;
    background: var(--cb-navy);
    color: #ffffff;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    flex-wrap: wrap;
}

.cb-top-left {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.cb-btn-back {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.45rem 0.85rem;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.28);
    border-radius: var(--cb-radius);
    color: #ffffff;
    font-weight: 650;
    font-size: 0.88rem;
    cursor: pointer;
    transition: background 0.15s ease;
}
.cb-btn-back:hover {
    background: rgba(255, 255, 255, 0.24);
}

.cb-top-center {
    flex: 1 1 auto;
    text-align: center;
}
.cb-top-title {
    margin: 0;
    font-size: 1.05rem;
    font-weight: 750;
    color: #ffffff;
    letter-spacing: 0.02em;
}

.cb-top-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

/* Timer Widget */
.cb-timer-widget {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: var(--cb-radius);
    padding: 0.3rem 0.65rem;
}
.cb-timer-display {
    font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
    font-size: 1.15rem;
    font-weight: 800;
    letter-spacing: 0.06em;
    color: #ffffff;
    min-width: 65px;
    text-align: center;
}
.cb-timer-display.is-expiring {
    color: #f87171;
}
.cb-btn-timer-toggle {
    background: #ffffff;
    color: var(--cb-navy);
    border: none;
    border-radius: 3px;
    font-size: 0.75rem;
    font-weight: 750;
    padding: 0.25rem 0.5rem;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}
.cb-btn-timer-toggle:hover {
    background: #e2e8f0;
}

/* Topic Filter Dropdown in Top Bar */
.cb-topic-filter-wrap {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: rgba(255, 255, 255, 0.12);
    padding: 0.25rem 0.6rem;
    border-radius: var(--cb-radius);
    border: 1px solid rgba(255, 255, 255, 0.25);
}
.cb-topic-label {
    font-size: 0.78rem;
    font-weight: 750;
    color: rgba(255, 255, 255, 0.88);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    white-space: nowrap;
}
.cb-topic-select {
    background: #ffffff;
    color: var(--cb-navy);
    border: 1px solid #cbd5e1;
    border-radius: 4px;
    padding: 0.28rem 0.55rem;
    font-size: 0.82rem;
    font-weight: 650;
    cursor: pointer;
    max-width: 260px;
}
.cb-topic-select:focus {
    outline: 2px solid var(--cb-teal);
}

/* Load Another Exercise Button */
.cb-btn-reload {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.45rem 0.95rem;
    background: var(--cb-teal);
    border: none;
    border-radius: var(--cb-radius);
    color: #ffffff;
    font-weight: 750;
    font-size: 0.88rem;
    cursor: pointer;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
    transition: background 0.15s ease, transform 0.08s ease;
}
.cb-btn-reload:hover {
    background: var(--cb-teal-hover);
}
.cb-btn-reload:active {
    transform: scale(0.98);
}

/* Full test nav in top bar */
.cb-fulltest-nav {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}
.cb-fulltest-counter {
    font-weight: 750;
    font-size: 0.88rem;
    color: #ffffff;
}

/* 2. LOADING OVERLAY */
.cb-loading-overlay {
    position: absolute;
    inset: 58px 0 0 0;
    background: rgba(244, 246, 248, 0.94);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 45;
    gap: 1rem;
}
.cb-spinner {
    width: 44px;
    height: 44px;
    border: 4px solid #cbd5e1;
    border-top-color: var(--cb-navy);
    border-radius: 50%;
    animation: cbSpin 0.75s linear infinite;
}
@keyframes cbSpin {
    to { transform: rotate(360deg); }
}
.cb-loading-overlay p {
    margin: 0;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--cb-navy);
}

/* 3. RUNNER CONTENT CONTAINER */
.cb-runner-container {
    flex: 1 0 auto;
    padding: 1.5rem 1.75rem 2.5rem;
    max-width: 1320px;
    width: 100%;
    margin-inline: auto;
    box-sizing: border-box;
}

.cambridge-runner {
    color: var(--cb-text);
    font-family: inherit;
    line-height: 1.6;
    /* Fill the workspace so the bottom bar stays pinned to the viewport bottom in every part */
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 100%;
    height: 100%;
    width: 100%;
}

.cb-runner-container {
    flex: 1 0 auto;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

/* Speaking parts: content grows to fill the space above the bottom bar */
.cb-speaking-layout {
    width: 100%;
}

/* Parts 1 and 4 have less content: center the header/examiner block in the upper-middle area */
.cb-speaking-layout-sparse {
    justify-content: center;
    padding-bottom: 6vh;
}

/* Parts 1 and 4: empty status bar under the examiner card is removed from view until it has a message */
.cb-speaking-layout-sparse .action-bar:has(#speakingStatus:empty),
.cb-speaking-layout .action-bar:has(#speakingStatus:empty) {
    display: none !important;
    margin: 0;
    padding: 0;
}

.cb-speaking-layout-sparse .cb-examiner-card {
    padding: 24px 20px;
    margin-bottom: 0;
}

.cb-speaking-layout-sparse .cb-examiner-avatar {
    width: 84px;
    height: 84px;
    font-size: 2.4rem;
    margin-bottom: 0.75rem;
}

.cb-speaking-layout-sparse .cb-speaking-status {
    font-size: 1.15rem;
}

.cb-speaking-layout-sparse .cb-turn-countdown {
    font-size: 1.3rem;
}

.cb-speaking-layout-sparse .cb-speaking-substatus {
    font-size: 1.1rem;
    line-height: 1.5;
}

.cb-speaking-layout-sparse .cb-mode-status-badge,
.cb-speaking-layout-sparse .cb-candidate-badge {
    font-size: 0.9rem;
}

/* Remove empty placeholder containers entirely from layout (no margin/padding leakage) */
.cb-speaking-layout-sparse .cb-speaking-secondary-card:empty,
.cb-speaking-layout-sparse .cb-speaking-transcript-card:empty,
.cb-speaking-layout-sparse .cb-task-card:empty,
.cb-transcript-card:empty {
    display: none !important;
    margin: 0;
    padding: 0;
}

/* Rubric Banner */
.cb-rubric-card, .cambridge-runner .task-header {
    background: #ffffff;
    border: 1px solid var(--cb-border);
    border-left: 5px solid var(--cb-navy);
    border-radius: var(--cb-radius);
    padding: 1rem 1.35rem;
    margin-bottom: 1.25rem;
    box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}
.cambridge-runner .task-badge {
    display: inline-block;
    background: var(--cb-navy-light);
    color: var(--cb-navy);
    font-size: 0.78rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 0.25rem 0.65rem;
    border-radius: 4px;
    margin-bottom: 0.4rem;
}
.cambridge-runner .task-title, .cb-rubric-title {
    margin: 0 0 0.35rem;
    font-size: 1.3rem;
    color: var(--cb-navy);
    font-weight: 750;
}
.cambridge-runner .task-instructions, .cb-rubric-instructions {
    margin: 0;
    color: #334155;
    font-size: 0.95rem;
    line-height: 1.55;
}

/* Example Box */
.cambridge-runner .example-box {
    background: #ffffff;
    border-left: 4px solid var(--cb-teal);
    border: 1px solid var(--cb-border);
    border-left-width: 4px;
    border-radius: var(--cb-radius);
    padding: 0.85rem 1.15rem;
    margin-bottom: 1.35rem;
    font-size: 0.92rem;
}
.cambridge-runner .example-box strong {
    color: var(--cb-teal);
}

/* 4. PASSAGE CARD (Single Pane Parts 1, 2, 3) */
.cambridge-runner .passage-card {
    background: #ffffff;
    border: 1px solid var(--cb-border);
    border-radius: var(--cb-radius);
    padding: 1.5rem 1.85rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 1px 4px rgba(0,0,0,0.04);
    line-height: 2.15;
    font-size: 1.05rem;
}
.cambridge-runner .passage-title {
    font-size: 1.25rem;
    margin: 0 0 1rem;
    color: var(--cb-navy);
    font-weight: 750;
    border-bottom: 2px solid var(--cb-navy-light);
    padding-bottom: 0.5rem;
}

/* Inline Inputs and Gaps */
.cambridge-runner .gap-select, .cb-gap-select {
    display: inline-block;
    vertical-align: middle;
    margin: 0 0.35rem;
    padding: 0.35rem 0.65rem;
    font-size: 0.95rem;
    font-family: inherit;
    font-weight: 700;
    border: 2px solid var(--cb-border-dark);
    border-radius: var(--cb-radius);
    background-color: #ffffff;
    color: var(--cb-navy);
    cursor: pointer;
    transition: all 0.15s ease;
}
.cambridge-runner .gap-select:focus, .cb-gap-select:focus {
    outline: none;
    border-color: var(--cb-navy);
    box-shadow: 0 0 0 3px rgba(0, 46, 95, 0.2);
}

.cambridge-runner .gap-input, .cb-gap-input {
    display: inline-block;
    vertical-align: middle;
    width: 140px;
    margin: 0 0.35rem;
    padding: 0.35rem 0.65rem;
    font-size: 0.95rem;
    font-family: inherit;
    font-weight: 700;
    border: 2px solid var(--cb-border-dark);
    border-radius: var(--cb-radius);
    background-color: #ffffff;
    color: var(--cb-navy);
    text-align: center;
    transition: all 0.15s ease;
}
.cambridge-runner .gap-input:focus, .cb-gap-input:focus {
    outline: none;
    border-color: var(--cb-navy);
    box-shadow: 0 0 0 3px rgba(0, 46, 95, 0.2);
}

.cambridge-runner .prompt-word, .cb-prompt-word {
    font-weight: 800;
    color: var(--cb-teal);
    margin-left: 0.35rem;
    font-size: 0.9rem;
    letter-spacing: 0.05em;
}

/* Word Formation: gap and root stem stay on one line, root in a fixed right-aligned column */
.cambridge-runner .wf-gap, .cb-wf-gap {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    margin-inline: 0.2rem;
    white-space: nowrap;
    vertical-align: baseline;
}
.cambridge-runner .wf-root, .cb-wf-root {
    display: inline-block;
    min-width: 8ch;
    margin-left: 0;
    text-align: right;
    white-space: nowrap;
}

.cambridge-runner .inline-cloze-input, .cb-inline-cloze-input {
    width: 110px;
    max-width: 100%;
    vertical-align: baseline;
}

/* Validation status classes */
.cambridge-runner .is-correct, .cb-gap-select.is-correct, .cb-gap-input.is-correct {
    border-color: var(--cb-correct) !important;
    background-color: var(--cb-correct-bg) !important;
    color: var(--cb-correct) !important;
}
.cambridge-runner .is-incorrect, .cb-gap-select.is-incorrect, .cb-gap-input.is-incorrect {
    border-color: var(--cb-incorrect) !important;
    background-color: var(--cb-incorrect-bg) !important;
    color: var(--cb-incorrect) !important;
}

.cambridge-runner .inline-feedback, .cb-inline-feedback {
    display: inline-block;
    margin-left: 0.35rem;
    font-size: 0.85rem;
    font-weight: 750;
}
.cambridge-runner .inline-feedback.correct, .cb-inline-feedback.correct {
    color: var(--cb-correct);
}
.cambridge-runner .inline-feedback.incorrect, .cb-inline-feedback.incorrect {
    color: var(--cb-incorrect);
}

/* 5. PART 4 KEY WORD TRANSFORMATION */
.cambridge-runner .kwt-card, .cb-kwt-card {
    background: #ffffff;
    border: 1px solid var(--cb-border);
    border-radius: var(--cb-radius);
    padding: 1.25rem 1.5rem;
    margin-bottom: 1.15rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.03);
}
.cambridge-runner .kwt-num, .cb-kwt-num {
    display: inline-block;
    color: var(--cb-navy);
    font-size: 0.88rem;
    font-weight: 800;
    padding: 0.2rem 0.55rem;
    background: var(--cb-navy-light);
    border-radius: 4px;
    margin-bottom: 0.6rem;
}
.cambridge-runner .kwt-leadin, .cb-kwt-leadin {
    font-size: 1.05rem;
    margin-bottom: 0.65rem;
    color: #1e293b;
}
.cambridge-runner .kwt-prompt-pill, .cb-kwt-prompt-pill {
    display: inline-block;
    background: #f0fdfa;
    color: #0f766e;
    font-weight: 800;
    font-size: 0.98rem;
    letter-spacing: 0.08em;
    padding: 0.3rem 0.85rem;
    border-radius: 4px;
    border: 1px solid #99f6e4;
    margin-bottom: 0.65rem;
}
.cambridge-runner .kwt-target, .cb-kwt-target {
    font-size: 1.05rem;
    line-height: 2.2;
}
.cambridge-runner .kwt-input, .cb-kwt-input {
    min-width: 220px;
    max-width: 380px;
    padding: 0.4rem 0.75rem;
    border: 2px solid var(--cb-border-dark);
    border-radius: var(--cb-radius);
    font-weight: 700;
    color: var(--cb-navy);
}
.cambridge-runner .kwt-input:focus, .cb-kwt-input:focus {
    outline: none;
    border-color: var(--cb-navy);
    box-shadow: 0 0 0 3px rgba(0, 46, 95, 0.2);
}

/* 6. SYNCHRONIZED SPLIT-SCREEN LAYOUT (Parts 5, 6, 7 & Writing) */
.cambridge-runner .split-layout, .cb-split-workspace {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.35rem;
    margin-bottom: 1.5rem;
}
@media (min-width: 920px) {
    .cambridge-runner .split-layout, .cb-split-workspace {
        grid-template-columns: 1.1fr 1fr;
        height: calc(100vh - 210px);
        min-height: 520px;
    }
}
.cambridge-runner .reading-column, .cb-pane-left {
    background: var(--cb-surface);
    border: 1px solid var(--cb-border);
    border-radius: var(--cb-radius);
    padding: 1.4rem 1.6rem;
    overflow-y: auto;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04);
    line-height: 1.85;
    font-size: 1.02rem;
}
.cambridge-runner .questions-column, .cb-pane-right {
    display: flex;
    flex-direction: column;
    gap: 1.15rem;
    background: var(--cb-surface);
    border: 1px solid var(--cb-border);
    border-radius: var(--cb-radius);
    padding: 1.4rem 1.6rem;
    overflow-y: auto;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

/* Question Cards (Part 5 MCQ & Part 7) */
.cambridge-runner .question-card, .cb-mcq-card {
    background: #ffffff;
    border: 1px solid var(--cb-border);
    border-radius: var(--cb-radius);
    padding: 1.15rem 1.35rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.03);
    transition: border-color 0.15s ease;
}
.cambridge-runner .question-card.is-active-card, .cb-mcq-card.is-active-card {
    border-color: var(--cb-navy);
    box-shadow: 0 0 0 2px rgba(0, 46, 95, 0.2);
}
.cambridge-runner .question-stem, .cb-mcq-stem {
    font-weight: 750;
    margin-bottom: 0.75rem;
    font-size: 1rem;
    color: #1e293b;
}
.cambridge-runner .options-list, .cb-mcq-options {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.cambridge-runner .option-label, .cb-option-label {
    display: flex;
    align-items: flex-start;
    gap: 0.65rem;
    width: 100%;
    box-sizing: border-box;
    padding: 0.6rem 0.85rem;
    border: 1px solid #e2e8f0;
    border-radius: var(--cb-radius);
    cursor: pointer;
    font-size: 0.95rem;
    transition: background 0.12s, border-color 0.12s;
}
.cambridge-runner .option-label > span, .cb-option-label > span {
    flex: 1 1 auto;
    min-width: 0;
    word-break: break-word;
}
.cambridge-runner .option-label:hover, .cb-option-label:hover {
    background: var(--cb-navy-light);
    border-color: #94a3b8;
}
.cambridge-runner .option-label input[type="radio"], .cb-option-label input[type="radio"] {
    margin-top: 0.25rem;
    accent-color: var(--cb-navy);
}
.cambridge-runner .option-label.is-selected, .cb-option-label.is-selected {
    background: #e6edf5;
    border: 2px solid var(--cb-navy);
    font-weight: 650;
}

/* Part 6 Gapped Text */
.cambridge-runner .gap-slot, .cb-gapped-slot {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: #f1f5f9;
    padding: 0.3rem 0.65rem;
    border-radius: 4px;
    border: 2px dashed #64748b;
    margin: 0.25rem 0.2rem;
    vertical-align: middle;
}
.cambridge-runner .sentence-card, .cb-sentence-item {
    background: #ffffff;
    border: 1px solid var(--cb-border);
    border-radius: var(--cb-radius);
    padding: 0.85rem 1rem;
    margin-bottom: 0.75rem;
    font-size: 0.92rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.03);
}
.cambridge-runner .sentence-card.is-used, .cb-sentence-item.is-used {
    opacity: 0.55;
    background: #f8fafc;
    border-style: dashed;
}
.cambridge-runner .sentence-card strong, .cb-sentence-item strong {
    color: var(--cb-navy);
    font-size: 1rem;
    margin-right: 0.4rem;
}

/* Part 7 Sections Tab Navigation */
.cambridge-runner .section-tabs, .cb-sec-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    margin-bottom: 1rem;
}
.cambridge-runner .section-tab-btn, .cb-sec-tab-btn {
    padding: 0.4rem 0.85rem;
    border: 1px solid var(--cb-border);
    border-radius: var(--cb-radius);
    background: #ffffff;
    color: #1e293b;
    font-weight: 700;
    cursor: pointer;
    font-size: 0.88rem;
}
.cambridge-runner .section-tab-btn.active, .cb-sec-tab-btn.active {
    background: var(--cb-navy);
    color: #ffffff;
    border-color: var(--cb-navy);
}
.cambridge-runner .section-content, .cb-sec-content {
    line-height: 1.8;
}

/* 7. WRITING COMPONENT */
.cambridge-runner .writing-prompt-card {
    background: #ffffff;
    border: 1px solid var(--cb-border);
    border-radius: var(--cb-radius);
    padding: 1.4rem 1.6rem;
    margin-bottom: 1.25rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}
.cambridge-runner .notes-list {
    margin: 0.75rem 0 1rem 1.25rem;
    color: var(--cb-text);
}
.cambridge-runner .notes-list li {
    margin-bottom: 0.4rem;
}
.cambridge-runner .writing-textarea, .cb-writing-textarea {
    width: 100%;
    min-height: 380px;
    padding: 1rem 1.15rem;
    font-size: 1.05rem;
    font-family: inherit;
    line-height: 1.75;
    border: 2px solid var(--cb-border-dark);
    border-radius: var(--cb-radius);
    box-sizing: border-box;
    resize: vertical;
    transition: border-color 0.2s;
    background: #ffffff;
    color: #1e293b;
}
.cambridge-runner .writing-textarea:focus, .cb-writing-textarea:focus {
    outline: none;
    border-color: var(--cb-navy);
    box-shadow: 0 0 0 3px rgba(0, 46, 95, 0.2);
}
.cb-word-counter-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}
.cb-word-count-text {
    font-size: 0.95rem;
    font-weight: 700;
    color: #1e293b;
}
.cb-word-number {
    color: var(--cb-navy);
    font-size: 1.05rem;
}
.cb-word-pill, .cambridge-runner .word-count-badge {
    display: inline-block;
    padding: 0.25rem 0.65rem;
    border-radius: 4px;
    font-weight: 750;
    font-size: 0.82rem;
}
.cb-word-pill.is-under, .cambridge-runner .word-count-badge.low {
    background: var(--cb-amber-light);
    color: var(--cb-amber);
    border: 1px solid #fde68a;
}
.cb-word-pill.is-optimal, .cambridge-runner .word-count-badge.in-range {
    background: var(--cb-green-light);
    color: var(--cb-green);
    border: 1px solid #86efac;
}
.cb-word-pill.is-over, .cambridge-runner .word-count-badge.high {
    background: #eff6ff;
    color: var(--cb-navy);
    border: 1px solid #bfdbfe;
}

/* Writing Assessment Report */
.cambridge-runner .report-card, .cb-report-card {
    background: #ffffff;
    border: 1px solid var(--cb-border);
    border-radius: var(--cb-radius);
    padding: 1.6rem 1.85rem;
    margin-top: 1.5rem;
    box-shadow: 0 4px 14px rgba(0,0,0,0.06);
}
.cambridge-runner .criteria-grid, .cb-criteria-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 180px), 1fr));
    gap: 1rem;
    margin: 1.25rem 0;
}
.cambridge-runner .criteria-box, .cb-criteria-box {
    background: #f8fafc;
    border: 1px solid var(--cb-border);
    border-radius: var(--cb-radius);
    padding: 0.85rem 1rem;
    min-width: 180px;
}
.cambridge-runner .criteria-name, .cb-criteria-name {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 8px;
    flex-wrap: wrap;
    font-weight: 750;
    font-size: 0.95rem;
    line-height: 1.3;
    color: var(--cb-navy);
}
.cambridge-runner .criteria-name > span:first-child, .cb-criteria-name > span:first-child {
    min-width: 0;
    overflow-wrap: anywhere;
}
.cambridge-runner .criteria-score, .cb-criteria-score {
    white-space: nowrap;
    flex-shrink: 0;
    font-weight: 700;
}
.cambridge-runner .criteria-bar-bg, .cb-criteria-bar-bg {
    height: 8px;
    background: #e2e8f0;
    border-radius: 4px;
    overflow: hidden;
    margin: 0.4rem 0;
}
.cambridge-runner .criteria-bar-fill, .cb-criteria-bar-fill {
    height: 100%;
    background: var(--cb-navy);
    border-radius: 4px;
}
.cambridge-runner .correction-card, .cb-correction-item {
    background: #ffffff;
    border: 1px solid var(--cb-border);
    border-left: 4px solid var(--cb-incorrect);
    border-radius: var(--cb-radius);
    padding: 0.75rem 1rem;
    margin-bottom: 0.65rem;
}
.cambridge-runner .correction-orig {
    text-decoration: line-through;
    color: var(--cb-incorrect);
    font-weight: 650;
}
.cambridge-runner .correction-sugg {
    color: var(--cb-green);
    font-weight: 750;
    margin-left: 0.5rem;
}

/* Model Answer Card */
.cb-model-answer-card {
    margin-top: 1.5rem;
    background: #f8fafc;
    border: 1px solid var(--cb-border);
    border-left: 5px solid var(--cb-teal);
    border-radius: var(--cb-radius);
    padding: 1.25rem 1.5rem;
}

/* 8. LISTENING & SPEAKING */
.cambridge-runner .audio-player-card, .cb-listening-player {
    background: #ffffff;
    border: 1px solid var(--cb-border);
    border-radius: var(--cb-radius);
    padding: 1rem 1.35rem;
    margin-bottom: 1.25rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}
.cambridge-runner .audio-player-card audio, .cb-listening-player audio {
    flex: 1 1 260px;
}
.cb-dev-scrubber {
    flex: 1 1 260px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    min-width: 0;
}
.cb-dev-skip {
    flex: 0 0 auto;
    padding: 4px 8px;
    font-size: 12px;
    font-weight: 600;
    color: #475569;
    background: #f8fafc;
    border: 1px solid var(--cb-border);
    border-radius: 4px;
    cursor: pointer;
}
.cb-dev-skip:hover {
    background: #f1f5f9;
}
.cb-dev-range {
    flex: 1 1 auto;
    min-width: 120px;
    accent-color: var(--cb-teal);
    cursor: pointer;
}
.cb-dev-range:disabled {
    cursor: not-allowed;
    opacity: 0.5;
}
.cb-dev-time {
    flex: 0 0 auto;
    font-variant-numeric: tabular-nums;
    font-size: 12px;
    color: #4b5563;
    white-space: nowrap;
}
.cambridge-runner .transcript-drawer {
    background: #f8fafc;
    border: 1px solid var(--cb-border);
    border-radius: var(--cb-radius);
    padding: 1.25rem 1.5rem;
    margin-top: 1.25rem;
    font-size: 0.95rem;
    line-height: 1.8;
}
.cambridge-runner .speaking-prompt-card {
    background: #ffffff;
    border: 1px solid var(--cb-border);
    border-radius: var(--cb-radius);
    padding: 1.5rem 1.75rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}
.cambridge-runner .interlocutor-quote {
    background: #f0fdfa;
    border-left: 4px solid var(--cb-teal);
    padding: 0.9rem 1.25rem;
    border-radius: var(--cb-radius);
    font-style: italic;
    margin: 0.85rem 0;
    color: #134e4a;
}

/* ==========================================================================
   CAMBRIDGE SPEAKING ORAL INTERFACE & EXAMINER CARD
   ========================================================================== */
.cb-examiner-card {
    background: #ffffff;
    border: 1px solid var(--cb-border);
    border-radius: 12px;
    padding: 24px 20px;
    margin-bottom: 0.75rem;
    box-shadow: 0 2px 10px rgba(0, 46, 95, 0.05);
    /* Minimum height keeps the card roomy and stable between turns; it may grow if content requires it */
    box-sizing: border-box;
    min-height: 320px;
    overflow: visible;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: stretch;
}

/* Sized to its content so the timer is never squeezed into or overlapped by the footer */
.cb-examiner-card > .cb-examiner-center {
    flex: 0 0 auto;
    min-height: auto;
    justify-content: center;
}

.cb-examiner-top-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    padding-bottom: 0.6rem;
    border-bottom: 1px solid var(--cb-border);
}

.cb-mode-status-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.3rem 0.75rem;
    border-radius: 999px;
    background: #eef2f7;
    border: 1px solid var(--cb-border);
    color: var(--cb-navy);
    font-size: 0.8rem;
    font-weight: 700;
    white-space: nowrap;
}

.cb-mode-gate {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding: 1.5rem 0;
}

.cb-mode-gate-title { margin: 0; color: var(--cb-navy); }
.cb-mode-gate-subtitle { margin: 0; color: #475569; font-size: 0.9rem; }

.cb-solo-mode-details {
    margin: 0.75rem 0 1.25rem;
    padding-left: 1.2rem;
    line-height: 1.5;
    color: #334155;
}

.cb-solo-mode-details li { margin-bottom: 0.5rem; }

.cb-candidate-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.82rem;
    font-weight: 750;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    padding: 0.35rem 0.85rem;
    border-radius: 20px;
    background: #eff6ff;
    color: var(--cb-navy);
    border: 1px solid #bfdbfe;
    transition: all 0.2s ease;
}

.cb-candidate-badge.is-candidate-a {
    background: #eff6ff;
    color: var(--cb-navy);
    border-color: #93c5fd;
}

.cb-candidate-badge.is-candidate-b {
    background: #f5f3ff;
    color: #6b21a8;
    border-color: #d8b4fe;
}

.cb-candidate-badge.is-both {
    background: #f0fdf4;
    color: #166534;
    border-color: #bbf7d0;
}

.cb-examiner-center {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0.6rem 0.5rem 0.4rem;
}

.cb-examiner-avatar {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, #002e5f 0%, #0d9488 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.7rem;
    color: #ffffff;
    box-shadow: 0 4px 14px rgba(0, 46, 95, 0.15);
    margin-bottom: 0.5rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.cb-examiner-avatar.is-speaking {
    animation: cbExaminerPulse 1.6s infinite ease-in-out;
}

@keyframes cbExaminerPulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 4px 14px rgba(0, 46, 95, 0.2);
    }
    50% {
        transform: scale(1.08);
        box-shadow: 0 0 0 10px rgba(13, 148, 136, 0.22);
    }
}

.cb-speaking-status {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--cb-navy);
    margin-bottom: 0.4rem;
}

.cb-speaking-substatus {
    font-size: 0.88rem;
    color: #64748b;
    margin: 0;
    max-width: 540px;
}

.cb-speaking-waveform {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    height: 24px;
    margin: 0.5rem 0 0.15rem;
}

.cb-speaking-waveform span {
    display: block;
    width: 4px;
    height: 8px;
    background: #cbd5e1;
    border-radius: 2px;
    transition: height 0.15s ease, background 0.15s ease;
}

.cb-speaking-waveform.is-active span {
    background: var(--cb-teal);
    animation: cbWaveBar 0.9s ease-in-out infinite alternate;
}

.cb-speaking-waveform.is-recording span {
    background: #dc2626;
    animation: cbWaveBar 0.7s ease-in-out infinite alternate;
}

.cb-speaking-waveform span:nth-child(2) { animation-delay: 0.15s; }
.cb-speaking-waveform span:nth-child(3) { animation-delay: 0.3s; }
.cb-speaking-waveform span:nth-child(4) { animation-delay: 0.45s; }
.cb-speaking-waveform span:nth-child(5) { animation-delay: 0.2s; }
.cb-speaking-waveform span:nth-child(6) { animation-delay: 0.35s; }
.cb-speaking-waveform span:nth-child(7) { animation-delay: 0.5s; }
.cb-speaking-waveform span:nth-child(8) { animation-delay: 0.1s; }

@keyframes cbWaveBar {
    0% { height: 6px; }
    100% { height: 26px; }
}

.cb-turn-countdown-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 12px 0 16px 0;
}

.cb-turn-countdown-label {
    font-size: 0.78rem;
    font-weight: 750;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: #64748b;
    margin-bottom: 0.2rem;
}

.cb-turn-countdown {
    font-size: 1.8rem;
    font-weight: 800;
    font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
    color: var(--cb-navy);
    font-size: 1.4rem;
    font-weight: 700;
    line-height: 1;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.cb-turn-countdown.is-warning {
    color: #dc2626;
    animation: cbBlink 1s infinite;
}

.cb-turn-countdown.is-standby {
    color: #94a3b8;
}

/* Reserved action row: keeps its space even when the finish button is hidden */
.cb-examiner-card-footer {
    box-sizing: border-box;
    min-height: 44px;
    margin-top: 0;
    padding-top: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.75rem;
    border-top: 1px solid #f1f5f9;
    flex-wrap: nowrap;
    overflow: visible;
}

.cb-examiner-card-footer > button {
    position: relative;
    display: inline-flex;
    margin: 0 auto;
}

/* Part 4 top card: guidance only (no written stimulus) */
.cb-part4-stimulus-card {
    background: #eef6fb;
    border: 1px solid var(--cb-border);
    border-radius: 10px;
    padding: 0.9rem 1.1rem;
    margin-bottom: 0.75rem;
    text-align: center;
}

.cb-part4-guidance {
    margin: 0;
    color: var(--cb-navy);
    font-size: 0.98rem;
    line-height: 1.5;
}

.cb-part4-question-prompt {
    margin-top: 0.6rem;
    padding-top: 0.6rem;
    border-top: 1px dashed var(--cb-border);
    color: #475569;
    font-size: 0.9rem;
    font-style: italic;
}

/* Part 2 Photographic Stimuli Booklet */
.cb-part2-task-card {
    background: #ffffff;
    border: 1px solid var(--cb-border);
    border-radius: 12px;
    padding: 0.85rem 1rem;
    margin-bottom: 0.75rem;
    box-shadow: 0 2px 10px rgba(0, 46, 95, 0.05);
}

.cb-part2-printed-question-box {
    background: #eef6fb;
    border: 2px solid var(--cb-navy);
    border-radius: 8px;
    padding: 0.6rem 1rem;
    text-align: center;
    margin-bottom: 0.75rem;
    box-shadow: 0 2px 8px rgba(0, 46, 95, 0.06);
}

.cb-part2-printed-question {
    color: var(--cb-navy);
    font-size: 1.1rem;
    font-weight: 750;
    line-height: 1.35;
    margin: 0;
}

.cb-part2-printed-questions-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.cb-part2-printed-questions-list li {
    color: var(--cb-navy);
    font-size: 1.02rem;
    font-weight: 750;
    line-height: 1.3;
}

.cambridge-photos-container {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
    margin-top: 0;
}

@media (max-width: 680px) {
    .cambridge-photos-container {
        grid-template-columns: 1fr;
    }
}

.cb-photo-frame {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--cb-border);
    border-radius: 10px;
    overflow: hidden;
    background: #f8fafc;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
}

.cb-photo-img-wrapper {
    position: relative;
    width: 100%;
    height: 30vh;
    min-height: 140px;
    max-height: 30vh;
    background: #e2e8f0;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border-radius: 10px;
}

.cb-photo-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 10px;
    display: block;
    transition: transform 0.25s ease;
}

.cb-photo-img:hover {
    transform: scale(1.02);
}

.cb-photo-fallback {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1.25rem;
    text-align: center;
    background: #f8fafc;
    color: #475569;
    width: 100%;
    height: 100%;
    box-sizing: border-box;
}

.cb-photo-fallback-icon {
    font-size: 2.2rem;
    line-height: 1;
    margin-bottom: 0.5rem;
    opacity: 0.85;
}

.cb-photo-fallback-title {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--cb-navy);
    margin-bottom: 0.35rem;
}

.cb-photo-fallback-desc {
    font-size: 0.85rem;
    line-height: 1.45;
    color: #64748b;
    max-height: 100px;
    overflow-y: auto;
}


/* Part 2 compact layout: header + question + 2 photos + examiner card fit within 100vh at 100% zoom */
.cb-part2-layout .task-header {
    padding: 6px 12px;
    font-size: 0.9rem;
    margin-bottom: 4px;
}
.cb-part2-layout .task-header .task-badge {
    margin-bottom: 0.2rem;
    padding: 0.15rem 0.5rem;
    font-size: 0.7rem;
}
.cb-part2-layout .task-header .task-title {
    display: block;
    margin: 0 0 0.2rem;
    font-size: 1.05rem;
}
.cb-part2-layout .task-header .task-instructions {
    display: block;
    margin: 0;
    font-size: 0.8rem;
    line-height: 1.3;
}

.cb-part2-layout .cb-part2-task-card {
    padding: 6px 12px;
    margin-bottom: 6px;
}
.cb-part2-layout .cb-part2-printed-question-box {
    padding: 6px 12px;
    margin-bottom: 6px;
}
.cb-part2-layout .cb-part2-printed-question {
    font-size: 1.25rem;
    line-height: 1.3;
    font-weight: 700;
}
.cb-part2-layout .cb-part2-printed-questions-list li {
    font-size: 0.95rem;
    line-height: 1.3;
    font-weight: 600;
}

.cb-part2-layout .cambridge-photos-container {
    max-width: 960px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    align-items: center;
    justify-items: center;
}
.cb-part2-layout .cb-photo-frame {
    border: none;
    background: transparent;
    box-shadow: none;
    width: 100%;
    align-items: center;
}
.cb-part2-layout .cb-photo-img-wrapper {
    width: 100%;
    height: 300px;
    max-height: 42vh;
    max-width: 420px;
    min-height: 0;
    margin: 0 auto;
    background: transparent;
    border-radius: 8px;
}
.cb-part2-layout .cb-photo-img {
    width: 100%;
    height: 100%;
    max-height: none;
    object-fit: cover;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}
/* Hide the Part 2 status bar while it has no message, so no empty box sits under the examiner card */
.cb-part2-layout .action-bar:has(#speakingStatus:empty) {
    display: none;
}
.cb-part2-layout .cb-photo-img:hover {
    transform: none;
}
.cb-part2-layout .cb-photo-fallback {
    padding: 0.5rem;
}
.cb-part2-layout .cb-photo-fallback-icon {
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
}
.cb-part2-layout .cb-photo-fallback-desc {
    max-height: 48px;
}

.cb-part2-layout .cb-examiner-card {
    padding: 24px 20px;
    margin-bottom: 6px;
    min-height: 320px;
    height: auto;
    overflow: visible;
}
.cb-part2-layout .cb-examiner-center {
    padding: 0.2rem 0.5rem 0.1rem;
}
.cb-part2-layout .cb-examiner-avatar {
    width: 28px;
    height: 28px;
    font-size: 0.9rem;
    margin-bottom: 0.2rem;
}
.cb-part2-layout .cb-speaking-status {
    font-size: 0.9rem;
    margin-bottom: 0.1rem;
}
.cb-part2-layout .cb-speaking-substatus {
    font-size: 0.8rem;
}
.cb-part2-layout .cb-speaking-waveform {
    height: 16px;
    margin: 4px 0;
}
.cb-part2-layout .cb-turn-countdown-wrapper {
    margin-top: 0;
}
.cb-part2-layout .cb-turn-countdown-label {
    margin-bottom: 0;
    font-size: 0.7rem;
}
.cb-part2-layout .cb-turn-countdown {
    font-size: 1.3rem;
}
.cb-part2-layout .cb-examiner-card-footer {
    height: 40px;
    min-height: 40px;
}
.cb-part2-layout .cb-examiner-card-footer button {
    padding: 6px 14px;
    font-size: 0.85rem;
}

/* Part 3 compact layout: header + role banner + spidergram + examiner card + waveform + actions fit within 100vh at 100% zoom */
.cb-part3-layout .task-header {
    padding: 6px 12px;
    font-size: 0.9rem;
    margin-bottom: 4px;
}
.cb-part3-layout .task-header .task-badge {
    margin-bottom: 0.2rem;
    padding: 0.15rem 0.5rem;
    font-size: 0.7rem;
}
.cb-part3-layout .task-header .task-title {
    display: block;
    margin: 0 0 0.2rem;
    font-size: 1.05rem;
}
.cb-part3-layout .task-header .task-instructions {
    display: block;
    margin: 0;
    font-size: 0.8rem;
    line-height: 1.3;
}
.cb-part3-layout .cb-part3-stimulus-card {
    margin: 4px 0 6px;
    padding: 12px 16px;
}
/* Diagram canvas: dedicated zone with a minimum height so bottom nodes stay inside it and never reach the controls below. */
.cb-part3-layout .cb-spider {
    position: relative;
    overflow: visible;
    margin: 0 auto 10px;
}
@media (min-width: 641px) {
    .cb-part3-layout .cb-spider {
        height: 380px;
        min-height: 380px;
        max-height: 380px;
        margin: 0 auto 10px;
    }
}
/* Stacking: SVG connectors (1) sit beneath the centre card and option bubbles (2). */
.cb-part3-layout .cb-spider svg {
    z-index: 1;
    pointer-events: none;
}
.cb-part3-layout .cb-spider-center {
    padding: 0.7rem 0.9rem;
    z-index: 2;
}
.cb-part3-layout .cb-spider-center h3 {
    font-size: 1.08rem;
    font-weight: 800;
    margin: 0;
}
.cb-part3-layout .cb-spider-node {
    box-sizing: border-box !important;
    border: 2px solid var(--cb-teal, #0f766e);
    padding: 10px 18px;
    font-size: 1rem;
    line-height: 1.3;
    z-index: 2;
    white-space: normal;
    overflow-wrap: break-word;
}

.cb-part3-layout .cb-spider-node.selected-by-ai {
    border-color: #f59e0b;
    background-color: rgba(245, 158, 11, 0.08);
    box-shadow: none;
    animation: none;
}
.cb-part3-layout .cb-spider-node.selected-by-user {
    border-color: #10b981;
    background-color: rgba(16, 185, 129, 0.08);
    box-shadow: none;
    animation: none;
}

/* Interactive spidergram: pending nodes are clickable during Candidate A's turn. */
.cb-part3-layout .cb-spider-node.cb-node-pending-click {
    cursor: pointer;
}
.cb-part3-layout .cb-spider-node.cb-node-active {
    outline: 3px solid var(--color-speaking, #dc2626);
    outline-offset: 3px;
    box-shadow: 0 0 0 6px rgba(220, 38, 38, 0.18);
}
/* Dimmed with opaque colours rather than opacity: a translucent box lets the spoke line show through its interior.
   Keeps the node's inline absolute positioning; switching to relative shifts it downward. */
.cb-part3-layout .cb-spider-node.cb-node-discussed {
    background-color: #f1f5f9;
    border-color: #94a3b8;
    color: #64748b;
}
@media (max-width: 640px) {
    .cb-part3-layout .cb-spider-node.cb-node-discussed {
        position: relative;
    }
}
.cb-part3-layout .cb-spider-node.cb-node-discussed::after {
    content: "✓";
    position: absolute;
    box-sizing: border-box;
    top: -8px;
    right: -8px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #16a34a;
    color: #fff;
    font-size: 0.75rem;
    font-weight: 800;
    line-height: 20px;
    text-align: center;
}
.cb-part3-layout .cb-spider-hint {
    display: none;
    margin: 0.5rem 0 0;
    font-size: 1.15rem;
    letter-spacing: 0.01em;
    color: #64748b;
    font-style: italic;
}
/* Shown only while a topic gate waits for a bubble click (see setPromptPulse in the speaking runner). */
.cb-part3-layout .cb-spider-hint.cb-prompt-pulse-active {
    display: inline-block;
}

/* Non-blocking reminder shown above the question box when a topic gate waits too long. */
.cb-topic-nudge-toast {
    position: absolute;
    top: -2.75rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 30;
    pointer-events: none;
    max-width: 90%;
    padding: 0.5rem 1rem;
    border: 1.5px solid #b45309;
    border-radius: 999px;
    background: #fef3c7;
    color: #78350f;
    font-size: 0.95rem;
    font-weight: 600;
    text-align: center;
    white-space: nowrap;
    box-shadow: 0 4px 12px rgba(180, 83, 9, 0.2);
    animation: cbTopicNudgeFadeIn 0.4s ease-out both;
}
@keyframes cbTopicNudgeFadeIn {
    from { opacity: 0; transform: translate(-50%, 6px); }
    to { opacity: 1; transform: translate(-50%, 0); }
}
@media (max-width: 640px) {
    .cb-topic-nudge-toast {
        position: static;
        transform: none;
        margin: 0 auto 0.5rem;
        white-space: normal;
        animation-name: cbTopicNudgeFadeInStatic;
    }
}
@keyframes cbTopicNudgeFadeInStatic {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes promptSelectionPulse {
    0%, 100% {
        color: #ea580c; /* vibrant amber-orange */
        transform: scale(1);
        opacity: 1;
        text-shadow: 0 0 0 rgba(234, 88, 12, 0);
    }
    50% {
        color: #dc2626; /* warm red */
        transform: scale(1.03);
        opacity: 0.75;
        text-shadow: 0 0 8px rgba(220, 38, 38, 0.4);
    }
}

.cb-prompt-pulse-active {
    animation: promptSelectionPulse 1.4s infinite ease-in-out;
    font-weight: 700 !important;
    display: inline-block;
}

/* Mock speaking report: part accordions with a visible affordance. */
.cb-mock-part-accordion {
    border: 1px solid var(--cb-border);
    border-radius: 8px;
    margin-bottom: 0.6rem;
    transition: background 0.15s ease, border-color 0.15s ease;
}
.cb-mock-part-accordion:hover {
    background: #f8fafc;
    border-color: var(--color-speaking, #dc2626);
}
.cb-mock-part-accordion > summary {
    list-style: none;
    cursor: pointer;
    padding: 0.75rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.cb-mock-part-accordion > summary::-webkit-details-marker {
    display: none;
}
.cb-mock-part-title {
    font-weight: 700;
}
.cb-mock-part-hint {
    font-size: 0.82rem;
    color: #64748b;
}
.cb-mock-part-chevron {
    display: inline-block;
    transition: transform 0.2s ease;
}
.cb-mock-part-accordion[open] > summary .cb-mock-part-chevron {
    transform: rotate(180deg);
}
.cb-mock-part-body {
    padding: 0 1rem 0.75rem;
    display: grid;
    gap: 0.6rem;
}

.cb-part3-layout .cb-examiner-card {
    padding: 14px 20px 24px;
    margin-bottom: 12px;
    min-height: 230px;
    height: auto;
    overflow: visible;
}
.cb-part3-layout .cb-examiner-center {
    padding: 0.2rem 0.5rem 0.1rem;
}
.cb-part3-layout .cb-examiner-avatar {
    width: 36px;
    height: 36px;
    font-size: 1.05rem;
    margin-bottom: 0.2rem;
}
.cb-part3-layout .cb-speaking-status {
    font-size: 1rem;
    margin-bottom: 0.1rem;
}
.cb-part3-layout .cb-speaking-substatus {
    font-size: 0.85rem;
}
.cb-part3-layout .cb-speaking-waveform {
    height: 18px;
    margin: 4px 0;
}
.cb-part3-layout .cb-turn-countdown-wrapper {
    margin-top: 0;
}
.cb-part3-layout .cb-turn-countdown-label {
    margin-bottom: 0;
    font-size: 0.75rem;
}
.cb-part3-layout .cb-turn-countdown {
    font-size: 1.5rem;
}
.cb-part3-layout .cb-examiner-card-footer {
    height: auto;
    min-height: 44px;
    padding-bottom: 4px;
}
.cb-part3-layout .cb-examiner-card-footer button {
    padding: 8px 18px;
    font-size: 0.9rem;
}
.cb-part3-layout .action-bar {
    margin-top: 1.5rem;
    padding: 6px 12px;
}
/* Hide the status bar while empty so no blank white box appears under the examiner card */
.cb-part3-layout .action-bar:has(#speakingStatus:empty) {
    display: none;
}

/* Purge empty placeholder containers so they never render as blank boxes */
.cb-speaking-secondary-card:empty,
.cb-speaking-transcript-card:empty,
.cb-task-card:empty {
    display: none !important;
}


.cambridge-runner .recorder-widget, .cb-speaking-recorder {
    background: #ffffff;
    border: 1px solid var(--cb-border);
    border-radius: var(--cb-radius);
    padding: 1.5rem;
    margin: 1.25rem 0;
    text-align: center;
    box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}
.cambridge-runner .recording-timer, .cb-speaking-timer {
    font-size: 2.2rem;
    font-weight: 800;
    font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
    color: var(--cb-navy);
    margin: 0.5rem 0;
}
.cambridge-runner .recording-indicator, .cb-recording-dot {
    display: inline-block;
    width: 12px;
    height: 12px;
    background: #dc2626;
    border-radius: 50%;
    margin-right: 0.4rem;
    animation: cbBlink 1.2s infinite;
}
@keyframes cbBlink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

/* 9. BOTTOM QUESTION NAVIGATION PALETTE (Official Cambridge Bottom Bar) */
.cb-bottom-bar {
    position: sticky;
    bottom: 0;
    margin-top: auto;
    z-index: 45;
    background: #ffffff;
    border-top: 2px solid var(--cb-border);
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.08);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.65rem 1.25rem;
    flex-wrap: wrap;
}

.cb-bottom-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.cb-palette-label {
    font-size: 0.88rem;
    font-weight: 750;
    color: #334155;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.cb-palette-grid {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    flex-wrap: wrap;
}

.cb-palette-btn {
    width: 34px;
    height: 34px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--cb-navy);
    background: #ffffff;
    color: var(--cb-navy);
    border-radius: var(--cb-radius);
    font-weight: 750;
    font-size: 0.88rem;
    cursor: pointer;
    transition: all 0.12s ease;
}
.cb-palette-btn:hover {
    background: var(--cb-navy-light);
}

/* Answered: Solid dark navy fill */
.cb-palette-btn.is-answered {
    background: var(--cb-navy) !important;
    color: #ffffff !important;
    border-color: var(--cb-navy) !important;
}

/* Active question: Highlighted focus ring */
.cb-palette-btn.is-active {
    outline: 3px solid var(--cb-active-ring) !important;
    outline-offset: 1px;
}

/* Post-checking feedback states */
.cb-palette-btn.is-correct {
    background: var(--cb-correct) !important;
    color: #ffffff !important;
    border-color: var(--cb-correct) !important;
}
.cb-palette-btn.is-incorrect {
    background: var(--cb-incorrect) !important;
    color: #ffffff !important;
    border-color: var(--cb-incorrect) !important;
}

.cb-bottom-right {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    margin-left: auto;
}

.cb-btn-check {
    padding: 0.45rem 1rem;
    background: var(--cb-navy);
    color: #ffffff;
    border: none;
    border-radius: var(--cb-radius);
    font-weight: 750;
    font-size: 0.88rem;
    cursor: pointer;
    box-shadow: 0 1px 3px rgba(0,0,0,0.15);
    transition: background 0.15s ease;
}
.cb-btn-check:hover {
    background: var(--cb-navy-hover);
}

.cb-btn-nav {
    padding: 0.45rem 0.85rem;
    background: #ffffff;
    color: var(--cb-navy);
    border: 1px solid var(--cb-border-dark);
    border-radius: var(--cb-radius);
    font-weight: 650;
    font-size: 0.88rem;
    cursor: pointer;
    transition: background 0.12s ease;
}
.cb-btn-nav:hover:not(:disabled) {
    background: var(--cb-navy-light);
}
.cb-btn-nav:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

/* Practice Mode: "Send Results to Teacher" sits directly under the score banner */
.cb-btn-secondary {
    display: inline-block;
    padding: 10px 18px;
    background: #ffffff;
    color: #1e293b;
    border: 1px solid #cbd5e1;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}
.cb-btn-secondary:hover:not(:disabled) {
    background: #f1f5f9;
    border-color: #94a3b8;
}
.cb-btn-secondary:focus-visible {
    outline: 2px solid var(--cb-active-ring);
    outline-offset: 2px;
}

.cb-btn-send-practice-teacher {
    display: inline-block;
    min-width: 200px;
}

/* Practice Mode: score card (renderScoreBanner) */
.cb-score-card {
    max-width: 540px;
    margin: 24px auto;
    padding: 20px 24px;
    text-align: center;
    border-radius: 10px;
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
}
.cb-score-card-label {
    font-size: 13px;
    font-weight: 700;
    color: #64748b;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: 8px;
}
.cb-score-card-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 12px;
}
.cb-score-card-value {
    font-size: 32px;
    font-weight: 800;
    color: #1e3a8a;
    line-height: 1.1;
}
.cb-score-card-pill {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 700;
    border: 1px solid transparent;
}
.cb-score-card-pill.is-pass {
    background: #dcfce7;
    color: #166534;
    border-color: #86efac;
}
.cb-score-card-pill.is-below {
    background: #fef3c7;
    color: #92400e;
    border-color: #fcd34d;
}

/* Practice Mode: centered action row beneath the score card */
.cb-practice-action-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 12px;
    max-width: 540px;
    margin: 0 auto 16px;
}
.cb-practice-action-row .cb-btn-sent {
    display: inline-block;
    min-width: 200px;
    padding: 10px 18px;
    border-radius: 6px;
    border: 1px solid #86efac;
    background: #f0fdf4;
    color: #15803d;
    font-weight: 700;
    cursor: default;
}
.cb-send-alert {
    max-width: 540px;
    margin: 0 auto 16px;
    text-align: center;
    color: #b91c1c;
    font-size: 0.9rem;
    font-weight: 600;
}
.cb-send-alert[hidden] {
    display: none;
}

/* Practice Mode: delivery confirmation popup */
.cb-delivery-toast {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 60;
    display: flex;
    align-items: center;
    gap: 14px;
    max-width: min(420px, calc(100vw - 32px));
    padding: 18px 22px;
    border-radius: 12px;
    background: #ffffff;
    border: 1px solid #86efac;
    box-shadow: 0 20px 40px rgba(15, 23, 42, 0.18);
    cursor: pointer;
}
.cb-delivery-toast p {
    margin: 0;
    color: #14532d;
    font-weight: 700;
    font-size: 1rem;
}
.cb-delivery-toast-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: #22c55e;
    color: #ffffff;
    font-weight: 800;
    font-size: 1.1rem;
}

/* 10. SCORE SUMMARY BANNER */
.cambridge-runner .score-banner, .cb-score-banner {
    background: #ffffff;
    border: 2px solid var(--cb-navy);
    border-radius: var(--cb-radius);
    padding: 1.25rem 1.5rem;
    margin: 1.25rem 0;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1.25rem;
    box-shadow: 0 4px 12px rgba(0, 46, 95, 0.08);
}
.cambridge-runner .score-number, .cb-score-num {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--cb-navy);
    line-height: 1;
}
.cambridge-runner .score-label, .cb-score-label {
    font-size: 0.82rem;
    color: #64748b;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-top: 0.25rem;
}
.cambridge-runner .cefr-pill, .cb-cefr-pill {
    display: inline-block;
    padding: 0.35rem 0.85rem;
    border-radius: 4px;
    font-weight: 800;
    font-size: 0.95rem;
}
.cambridge-runner .cefr-pill.b2-pass, .cb-cefr-pill.b2-pass {
    background: var(--cb-green-light);
    color: var(--cb-green);
    border: 1px solid #86efac;
}
.cambridge-runner .cefr-pill.c1-pass, .cb-cefr-pill.c1-pass {
    background: #eff6ff;
    color: var(--cb-navy);
    border: 1px solid #93c5fd;
}
.cambridge-runner .cefr-pill.below-b2, .cb-cefr-pill.below-b2 {
    background: var(--cb-incorrect-bg);
    color: var(--cb-incorrect);
    border: 1px solid #fca5a5;
}

/* Explanation Cards */
.cambridge-runner .explanation-card, .cb-explanation-card {
    background: #f8fafc;
    border: 1px solid var(--cb-border);
    border-radius: var(--cb-radius);
    padding: 0.75rem 1rem;
    margin-top: 0.65rem;
    font-size: 0.9rem;
    color: #334155;
}
.cambridge-runner .explanation-card strong, .cb-explanation-card strong {
    color: var(--cb-navy);
}

/* Action Bars */
.cambridge-runner .action-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem;
    margin-top: 1.25rem;
    padding: 1rem 1.25rem;
    background: #ffffff;
    border: 1px solid var(--cb-border);
    border-radius: var(--cb-radius);
    box-shadow: 0 1px 3px rgba(0,0,0,0.03);
}

.button {
    display: inline-flex;
    min-height: 40px;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1rem;
    border: 1px solid var(--cb-navy);
    border-radius: var(--cb-radius);
    background: var(--cb-navy);
    color: #ffffff;
    cursor: pointer;
    font-weight: 700;
    font-size: 0.9rem;
    text-decoration: none;
    transition: background 0.15s ease;
}
.button:hover {
    background: var(--cb-navy-hover);
}
.button.secondary {
    border-color: var(--cb-border-dark);
    background: #ffffff;
    color: var(--cb-navy);
}
.button.secondary:hover {
    background: var(--cb-navy-light);
}
.button:disabled {
    opacity: 0.55;
    cursor: not-allowed;
}

/* 11. PRINTABLE REPORT & MEDIA PRINT */
#printable-exam-report {
    display: none;
}

@media print {
    body * {
        visibility: hidden !important;
    }
    #printable-exam-report,
    #printable-exam-report * {
        visibility: visible !important;
    }
    #printable-exam-report {
        display: block !important;
        position: absolute;
        left: 0;
        top: 0;
        width: 100%;
        margin: 0;
        padding: 24px;
        background: #ffffff;
        color: #1e293b;
        box-sizing: border-box;
    }
}

/* 12. TEACHER NOTIFICATION MODAL & TOAST */
.cb-modal-backdrop {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(15, 23, 42, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.25rem;
}
.cb-modal-card {
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    width: min(520px, 100%);
    padding: 1.5rem;
    position: relative;
}
.cb-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
    border-bottom: 1px solid var(--cb-border);
    padding-bottom: 0.75rem;
}
.cb-modal-header h3 {
    margin: 0;
    color: var(--cb-navy);
    font-size: 1.2rem;
}
.cb-modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    line-height: 1;
    cursor: pointer;
    color: #64748b;
}
.cb-modal-close:hover {
    color: #0f172a;
}
.cb-form-group {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    margin-bottom: 1rem;
}
.cb-form-group label {
    font-size: 0.88rem;
    font-weight: 700;
    color: #334155;
}
.cb-form-group input {
    padding: 0.65rem 0.85rem;
    border: 1px solid var(--cb-border-dark);
    border-radius: 6px;
    font-size: 0.95rem;
    font-family: inherit;
}
.cb-form-group input:focus {
    outline: none;
    border-color: var(--cb-navy);
    box-shadow: 0 0 0 3px rgba(0, 46, 95, 0.15);
}

/* 13. AUDIO SETUP CALIBRATION CARD */
.cb-audio-setup-card {
    background: #ffffff;
    border: 1px solid var(--cb-border);
    border-radius: 12px;
    padding: 1.75rem;
    max-width: 780px;
    margin: 1.5rem auto;
    box-shadow: 0 4px 16px rgba(0,0,0,0.06);
}

/* 14. DEDUPLICATED NAV & CAMBRIDGE CB BOTTOM BAR ALIGNMENT */
.cb-fulltest-counter-badge {
    display: inline-flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.3);
    padding: 0.35rem 0.75rem;
    border-radius: var(--cb-radius);
    font-size: 0.88rem;
    font-weight: 700;
    color: #ffffff;
    letter-spacing: 0.02em;
}

/* Full Test R&UE part switcher (segmented tabs in the top bar) */
.cb-part-navigator {
    display: inline-flex;
    flex-wrap: wrap;
    gap: 2px;
    padding: 2px;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--cb-radius);
}

.cb-part-tab {
    appearance: none;
    border: 0;
    background: transparent;
    color: #ffffff;
    padding: 0.3rem 0.6rem;
    border-radius: calc(var(--cb-radius) - 2px);
    font: inherit;
    font-size: 0.82rem;
    font-weight: 700;
    cursor: pointer;
}
.cb-part-tab:hover {
    background: rgba(255, 255, 255, 0.2);
}
.cb-part-tab:focus-visible {
    outline: 2px solid #ffffff;
    outline-offset: 1px;
}
.cb-part-tab.active {
    background: #ffffff;
    color: var(--cb-navy);
}

.cb-btn-nav-primary {
    background: var(--cb-navy) !important;
    color: #ffffff !important;
    border-color: var(--cb-navy) !important;
    font-weight: 750 !important;
}
.cb-btn-nav-primary:hover:not(:disabled) {
    background: var(--cb-navy-hover) !important;
}

.cb-btn-finish {
    background: #15803d !important;
    color: #ffffff !important;
    border-color: #15803d !important;
    font-weight: 800 !important;
    box-shadow: 0 2px 8px rgba(21, 128, 61, 0.25) !important;
}
.cb-btn-finish:hover:not(:disabled) {
    background: #166534 !important;
}

/* 15. COMPLETION BANNER */
.cb-completion-banner {
    animation: cb-fade-in 0.3s ease;
}
@keyframes cb-fade-in {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 16. INTERLOCUTOR & MULTI-EXTRACT AUDIO CARDS */
.cb-interlocutor-audio-card {
    background: #eef6fb;
    border: 1px solid var(--cb-border);
    border-left: 4px solid var(--cb-navy);
    border-radius: 6px;
}
.cb-extract-audio-slot, .cb-spk-audio-slot {
    background: #f8fafc;
    border: 1px solid var(--cb-line);
    border-radius: 6px;
    padding: 0.5rem 0.75rem;
}

/* 17. CONSOLIDATED SCORE REPORT & FEEDBACK VIEW */
.cb-consolidated-report {
    max-width: 960px;
    margin: 1.5rem auto 3rem;
    padding: 1.5rem;
    background: #ffffff;
    border: 1px solid var(--cb-border);
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 46, 95, 0.06);
}
.cb-consolidated-header {
    border-bottom: 2px solid var(--cb-navy);
    padding-bottom: 1.25rem;
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}
.cb-consolidated-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
}
.cb-consolidated-card {
    background: #f8fafc;
    border: 1px solid var(--cb-border);
    border-top: 4px solid var(--cb-navy);
    border-radius: 8px;
    padding: 1.1rem;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}
.cb-consolidated-card h4 {
    margin: 0;
    color: var(--cb-navy);
    font-size: 1rem;
}
.cb-consolidated-scale {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--cb-navy);
    line-height: 1.1;
}
.cb-consolidated-sub {
    font-size: 0.85rem;
    color: var(--cb-muted);
}
.cb-review-section {
    margin-top: 2rem;
    border-top: 1px solid var(--cb-line);
    padding-top: 1.5rem;
}
.cb-review-section h3 {
    color: var(--cb-navy);
    margin: 0 0 1rem;
    font-size: 1.2rem;
}

/* 18. MINIMALIST LISTENING AUDIO PLAYER (NO SEEK BARS / SCRUBBERS) */
.cb-listening-player-strict,
.cb-listening-player-flexible {
    background: #ffffff;
    border: 1px solid var(--cb-border);
    border-left: 4px solid var(--cb-navy);
    border-radius: 8px;
    padding: 1rem 1.25rem;
    margin: 1rem 0 1.25rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
}

.cb-audio-pulse-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.cb-pulse-speaker {
    font-size: 1.5rem;
    animation: cb-speaker-pulse 1.2s infinite ease-in-out;
}

@keyframes cb-speaker-pulse {
    0%, 100% { transform: scale(1); opacity: 0.85; }
    50% { transform: scale(1.15); opacity: 1; }
}

.cb-audio-waves {
    display: flex;
    align-items: flex-end;
    gap: 3px;
    height: 18px;
}

.cb-audio-waves span {
    display: block;
    width: 3px;
    background: var(--cb-teal);
    border-radius: 2px;
    animation: cb-wave-bar 1s infinite ease-in-out;
}
.cb-audio-waves span:nth-child(1) { height: 6px; animation-delay: 0.1s; }
.cb-audio-waves span:nth-child(2) { height: 14px; animation-delay: 0.3s; }
.cb-audio-waves span:nth-child(3) { height: 18px; animation-delay: 0.2s; }
.cb-audio-waves span:nth-child(4) { height: 9px; animation-delay: 0.4s; }

@keyframes cb-wave-bar {
    0%, 100% { transform: scaleY(0.4); }
    50% { transform: scaleY(1); }
}

.cb-audio-status-info {
    flex: 1 1 auto;
}
.cb-audio-status-title {
    font-weight: 750;
    color: var(--cb-navy);
    font-size: 0.95rem;
}
.cb-audio-status-sub {
    font-size: 0.82rem;
    color: var(--cb-muted);
    margin-top: 0.2rem;
}

.cb-btn-audio-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.55rem 1.15rem;
    background: var(--cb-navy);
    color: #ffffff;
    border: none;
    border-radius: var(--cb-radius);
    font-weight: 750;
    font-size: 0.9rem;
    cursor: pointer;
    transition: background 0.15s ease;
}
.cb-btn-audio-toggle:hover {
    background: var(--cb-navy-hover);
}
.cb-btn-audio-toggle.is-playing {
    background: #0f766e;
}
.cb-btn-audio-toggle.is-playing:hover {
    background: #115e59;
}

/* 19. PRE-EXAM MODE SELECTOR CARD */
.cb-mode-selector-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
    margin: 1.25rem 0;
}
.cb-mode-card {
    border: 2px solid var(--cb-border);
    border-radius: 10px;
    padding: 1.25rem;
    background: #ffffff;
    cursor: pointer;
    transition: all 0.15s ease;
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
    position: relative;
    text-align: left;
}
.cb-mode-card:hover {
    border-color: var(--cb-navy);
    box-shadow: 0 4px 14px rgba(0, 46, 95, 0.08);
}
.cb-mode-card.is-selected {
    border-color: var(--cb-navy);
    background: #f8fafc;
    box-shadow: 0 0 0 2px var(--cb-navy);
}
.cb-mode-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
}
.cb-mode-title {
    font-size: 1.08rem;
    font-weight: 800;
    color: var(--cb-navy);
    margin: 0;
}
.cb-mode-badge {
    font-size: 0.73rem;
    font-weight: 800;
    text-transform: uppercase;
    padding: 0.2rem 0.55rem;
    border-radius: 4px;
    letter-spacing: 0.05em;
}
.cb-mode-badge.strict {
    background: #fef2f2;
    color: #b91c1c;
    border: 1px solid #fecaca;
}
.cb-mode-badge.flexible {
    background: #f0fdf4;
    color: #15803d;
    border: 1px solid #bbf7d0;
}
.cb-mode-features {
    list-style: none;
    padding: 0;
    margin: 0;
    font-size: 0.86rem;
    color: #475569;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}
.cb-mode-features li::before {
    content: "✓ ";
    color: var(--cb-teal);
    font-weight: 800;
}

/* 20. RESPONSIVE MOBILE QUESTION NAVIGATION (SINGLE ROW SCROLL STRIP) */
@media (max-width: 768px) {
    .cb-bottom-bar {
        padding: 0.45rem 0.75rem;
        gap: 0.5rem;
        flex-wrap: nowrap !important;
    }
    .cb-bottom-left {
        flex: 1 1 auto;
        min-width: 0;
        gap: 0.35rem;
        flex-wrap: nowrap !important;
        overflow: hidden;
    }
    .cb-palette-label {
        display: none !important;
    }
    .cb-palette-grid {
        display: flex !important;
        flex-wrap: nowrap !important;
        overflow-x: auto !important;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: thin;
        gap: 0.35rem;
        padding: 2px 0;
        max-width: 100%;
    }
    .cb-palette-btn {
        flex: 0 0 32px;
        width: 32px;
        height: 32px;
        font-size: 0.82rem;
    }
    .cb-bottom-right {
        flex: 0 0 auto;
        margin-left: 0.35rem;
        gap: 0.35rem;
    }
    .cb-bottom-right .cb-btn-nav {
        padding: 0.45rem 0.65rem;
        font-size: 0.82rem;
        white-space: nowrap;
    }
}

/* 21. MOBILE PHASE 1: iOS AUTO-ZOOM, 44PX TOUCH TARGETS, SAFE AREAS */
@media (max-width: 768px) {
    /* Inputs at >= 16px prevent iOS Safari auto-zoom on focus */
    .cambridge-runner .gap-select, .cb-gap-select,
    .cambridge-runner .gap-input, .cb-gap-input,
    .cambridge-runner .kwt-input, .cb-kwt-input,
    .cb-topic-select,
    .cb-form-group input,
    select,
    textarea {
        font-size: max(16px, 1rem);
    }

    .cb-palette-btn {
        flex: 0 0 44px;
        width: 44px;
        height: 44px;
    }

    .cb-btn-nav {
        min-height: 44px;
    }

    .cambridge-runner .option-label, .cb-option-label {
        min-height: 44px;
        display: flex;
        align-items: center;
    }

    .cb-bottom-bar {
        padding-bottom: max(0.6rem, env(safe-area-inset-bottom));
    }

    .cb-bottom-right {
        display: flex !important;
        flex-direction: row !important;
        flex-wrap: nowrap !important;
        overflow-x: auto !important;
        -webkit-overflow-scrolling: touch;
        width: 100% !important;
        max-width: 100% !important;
        min-width: 0 !important;
        gap: 8px !important;
        padding: 4px 2px !important;
        scrollbar-width: none; /* Hide scrollbar for clean UI */
    }
    .cb-bottom-right::-webkit-scrollbar {
        display: none;
    }
    .cb-bottom-right > * {
        flex: 0 0 auto !important; /* Prevent buttons from shrinking or compressing */
        white-space: nowrap !important;
    }
}

/* Narrow phones: keep action buttons reachable instead of clipping */
@media (max-width: 480px) {
    .cb-bottom-bar {
        flex-wrap: wrap !important;
    }
    .cb-bottom-left {
        min-width: 0;
        overflow-x: auto;
    }
    .cb-bottom-right {
        display: flex !important;
        flex-direction: row !important;
        flex-wrap: nowrap !important;
        overflow-x: auto !important;
        -webkit-overflow-scrolling: touch;
        width: 100% !important;
        max-width: 100% !important;
        min-width: 0 !important;
        margin-left: 0;
        justify-content: flex-start;
        gap: 8px !important;
        padding: 4px 2px !important;
        scrollbar-width: none; /* Hide scrollbar for clean UI */
    }
    .cb-bottom-right::-webkit-scrollbar {
        display: none;
    }
    .cb-bottom-right > * {
        flex: 0 0 auto !important; /* Prevent buttons from shrinking or compressing */
        white-space: nowrap !important;
    }
}

/* 22. MOBILE SCROLL AUTO-HIDE: Parts strip (top) and question palette bar (bottom) */
@media (max-width: 768px) {
    .cb-parts-nav, .cb-part-navigator, .cb-bottom-bar {
        transition: transform 0.3s ease, opacity 0.3s ease;
    }
    body.cb-nav-hidden .cb-parts-nav,
    body.cb-nav-hidden .cb-part-navigator {
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
    }
    body.cb-nav-hidden .cb-bottom-bar {
        transform: translateY(100%);
        opacity: 0;
        pointer-events: none;
    }
}