/* CBT Exam Platform - Practice / PYQ View Styles */

/* 1. Full-Width Theme Overrides */
body.single-quiz #primary.cbt-practice-content-area,
body.single-quiz .cbt-practice-content-area,
body.single-quiz .cbt-practice-page,
.cbt-practice-content-area,
.cbt-practice-page {
    --cbt-practice-font-scale: 1;
    width: 100% !important;
    max-width: 100% !important;
    margin: 0 !important;
    box-sizing: border-box !important;
    float: none !important;
}

body.single-quiz .site-content,
body.single-quiz .content-area,
body.single-quiz .site-main,
body.single-quiz .entry-content,
body.single-quiz .ast-container,
body.single-quiz .grid-container,
body.single-quiz #content {
    width: 100% !important;
    max-width: 100% !important;
    margin-left: auto !important;
    margin-right: auto !important;
    padding-left: 0 !important;
    padding-right: 0 !important;
    float: none !important;
}

body.single-quiz #secondary,
body.single-quiz .sidebar,
body.single-quiz .widget-area {
    display: none !important;
}

/* 2. Practice Page Layout */
.cbt-practice-page {
    background: linear-gradient(180deg, #eef4ff 0, #f8fafc 260px, #f8fafc 100%);
    color: #1f2937;
    padding: 32px 20px !important;
    min-height: 80vh;
    isolation: isolate;
    overflow-x: clip;
    box-sizing: border-box;
}

.cbt-practice-container {
    max-width: 1260px !important;
    width: min(100%, 1260px) !important;
    margin: 0 auto !important;
    box-sizing: border-box !important;
}

.cbt-practice-container *,
.cbt-practice-container *::before,
.cbt-practice-container *::after {
    box-sizing: border-box;
}

.cbt-practice-header {
    display: flex;
    justify-content: space-between;
    gap: 32px;
    align-items: center;
    background: linear-gradient(120deg, #ffffff 0%, #f7faff 100%);
    border: 1px solid #dce6f3;
    border-radius: 22px;
    padding: 30px 34px;
    margin: 18px 0;
    box-shadow: 0 16px 36px rgba(30, 64, 175, 0.1);
    overflow: hidden;
    position: relative;
}

.cbt-practice-header-main h1 {
    margin-top: 8px;
    color: #0f2447;
    letter-spacing: -0.02em;
}

.cbt-practice-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 4px;
    padding: 5px 10px;
    border: 1px solid #bfdbfe;
    border-radius: 999px;
    background: #eff6ff;
    color: #1d4ed8;
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.08em;
}

.cbt-practice-eyebrow-mark {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #22c55e;
    box-shadow: 0 0 0 4px #dcfce7;
}

.cbt-practice-header:before {
    content: "";
    position: absolute;
    inset: 0 auto 0 0;
    width: 6px;
    background: #2563eb;
}

.cbt-practice-header-main {
    min-width: 0;
}

.cbt-practice-header-meta {
    display: flex;
    align-items: center;
    gap: 8px;
}

.cbt-practice-header-meta p {
    margin: 0;
}

.cbt-practice-progress-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #22c55e;
    box-shadow: 0 0 0 4px #dcfce7;
}

.cbt-practice-header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.cbt-practice-eyebrow {
    color: #2563eb;
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin: 0 0 6px;
}

.cbt-practice-header h1 {
    margin: 0 0 6px;
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    color: #0f172a;
    font-weight: 700;
}

.cbt-practice-header p {
    margin: 0;
    color: #64748b;
    font-size: 0.95rem;
}

.cbt-practice-exam-info {
    display: flex;
    position: relative;
    align-items: center;
    gap: 12px;
    min-height: 66px;
    margin: 18px 0 20px;
    padding: 12px 16px 12px 14px;
    border: 1px solid #f4c46b;
    border-left: 5px solid #e58a00;
    border-radius: 12px;
    background: linear-gradient(105deg, #fff7df 0%, #fffaf0 62%, #ffffff 100%);
    color: #713f12;
    box-shadow: 0 7px 18px rgba(180, 83, 9, 0.13);
}

.cbt-practice-exam-info-icon {
    display: grid;
    place-items: center;
    flex: 0 0 36px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: #ffedb5;
    color: #b45309;
    font-size: 1.05rem;
    box-shadow: inset 0 0 0 1px #f4c46b;
}

.cbt-practice-exam-info-content {
    display: flex;
    min-width: 0;
    flex: 1 1 auto;
    flex-direction: column;
    gap: 3px;
}

.cbt-practice-exam-info-label {
    color: #92400e;
    font-size: 0.77rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    line-height: 1.2;
}

.cbt-practice-exam-info-source {
    color: #451a03;
    font-size: 0.98rem;
    font-weight: 700;
    line-height: 1.4;
    overflow-wrap: anywhere;
}

.cbt-practice-exam-info-badge {
    flex: 0 0 auto;
    border: 1px solid #f4c46b;
    border-radius: 999px;
    background: #f59e0b;
    color: #fff;
    padding: 5px 9px;
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 0.08em;
}

@media (max-width: 560px) {
    .cbt-practice-exam-info {
        align-items: flex-start;
        gap: 10px;
        padding: 12px;
    }

    .cbt-practice-exam-info-badge {
        display: none;
    }
}

.cbt-practice-score {
    min-width: 178px;
    text-align: center;
    background: linear-gradient(145deg, #ffffff 0%, #f8fbff 100%);
    border: 1px solid #bfdbfe;
    border-radius: 16px;
    padding: 13px 18px;
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.1);
    position: relative;
    overflow: hidden;
}

.cbt-practice-score:before {
    content: "";
    position: absolute;
    inset: 0 0 auto;
    height: 4px;
    background: linear-gradient(90deg, #2563eb, #06b6d4);
}

.cbt-practice-score-label,
.cbt-practice-score-progress {
    display: block;
    color: #64748b;
    font-size: 0.76rem;
    font-weight: 600;
}

.cbt-practice-score strong {
    display: block;
    color: #0f172a;
    font-size: 2rem;
    line-height: 1.15;
    margin: 4px 0;
}

.cbt-practice-score strong small {
    color: #94a3b8;
    font-size: calc(1rem * var(--cbt-practice-font-scale));
    font-weight: 700;
}

.cbt-practice-live-stats {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 3px 10px;
    margin-top: 9px;
    text-align: left;
    font-size: 0.72rem;
    color: #64748b;
}

.cbt-practice-live-stats span {
    white-space: nowrap;
}

.cbt-practice-live-stats strong {
    display: inline;
    font-size: 0.76rem;
    margin: 0;
}

.cbt-practice-live-stats .is-correct strong { color: #16a34a; }
.cbt-practice-live-stats .is-wrong strong { color: #dc2626; }
.cbt-practice-live-stats .is-unanswered strong { color: #64748b; }

.cbt-practice-restart,
.cbt-practice-show-solution {
    border: 1px solid #cbd5e1;
    background: #fff;
    color: #334155;
    border-radius: 10px;
    padding: 10px 14px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.15s ease;
}

.cbt-practice-restart:hover,
.cbt-practice-show-solution:hover {
    background: #f1f5f9;
    border-color: #94a3b8;
}

.cbt-practice-restart {
    margin-top: 0;
    font-size: 0.82rem;
    white-space: nowrap;
    border-color: #fecaca;
    background: #fff7f7;
    color: #b91c1c;
    box-shadow: 0 4px 10px rgba(185, 28, 28, 0.08);
}

.cbt-practice-restart:hover,
.cbt-practice-restart:focus-visible {
    border-color: #fca5a5;
    background: #fee2e2;
    color: #991b1b;
    box-shadow: 0 6px 14px rgba(185, 28, 28, 0.14);
    transform: translateY(-1px);
}

.cbt-practice-restart:focus-visible {
    outline: 3px solid rgba(239, 68, 68, 0.22);
    outline-offset: 2px;
}

/* 2a. Study Mode Toggle */
.cbt-practice-study-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    white-space: nowrap;
    font-size: 0.82rem;
    font-weight: 600;
    color: #475569;
    user-select: none;
}

.cbt-practice-study-toggle input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.cbt-practice-study-toggle-slider {
    position: relative;
    display: inline-block;
    width: 40px;
    height: 22px;
    background: #cbd5e1;
    border-radius: 999px;
    transition: background 0.25s ease;
    flex-shrink: 0;
}

.cbt-practice-study-toggle-slider::after {
    content: '';
    position: absolute;
    top: 3px;
    left: 3px;
    width: 16px;
    height: 16px;
    background: #fff;
    border-radius: 50%;
    transition: transform 0.25s ease;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

.cbt-practice-study-toggle input:checked + .cbt-practice-study-toggle-slider {
    background: #8b5cf6;
}

.cbt-practice-study-toggle input:checked + .cbt-practice-study-toggle-slider::after {
    transform: translateX(18px);
}

/* 2b. Font Size Controls */
.cbt-practice-font-controls {
    display: flex;
    gap: 2px;
    border: 1px solid #dbe3ec;
    border-radius: 8px;
    overflow: hidden;
}

.cbt-practice-font-btn {
    border: none;
    background: #fff;
    color: #475569;
    padding: 6px 10px;
    cursor: pointer;
    font-weight: 700;
    font-size: 0.82rem;
    transition: background 0.15s ease;
    line-height: 1;
}

.cbt-practice-font-btn:hover {
    background: #f1f5f9;
}

.cbt-practice-font-btn sup {
    font-size: 0.65em;
}

/* 2c. Summary Button */
.cbt-practice-summary-btn {
    border: 1px solid #c7d2fe;
    background: linear-gradient(135deg, #eef2ff, #e0e7ff);
    color: #4338ca;
    border-radius: 10px;
    padding: 10px 14px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.82rem;
    transition: all 0.15s ease;
    white-space: nowrap;
}

.cbt-practice-summary-btn:hover {
    background: linear-gradient(135deg, #e0e7ff, #c7d2fe);
    border-color: #818cf8;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(67, 56, 202, 0.15);
}

/* 3. Main Grid Layout */
.cbt-practice-layout {
    display: grid !important;
    grid-template-columns: minmax(0, 1fr) minmax(0, 320px) !important;
    gap: 28px !important;
    width: 100% !important;
    box-sizing: border-box !important;
}

.cbt-practice-questions,
.cbt-practice-sidebar,
.cbt-practice-question,
.cbt-practice-question-text,
.cbt-practice-solution {
    min-width: 0;
    max-width: 100%;
}

/* 4. Question Cards */
.cbt-practice-question {
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 18px;
    padding: 26px 28px;
    margin-bottom: 22px;
    box-shadow: 0 10px 28px rgba(15, 23, 42, 0.06);
    scroll-margin-top: 24px;
    transition: opacity 0.2s ease;
}

.cbt-practice-question-head {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: center;
}

.cbt-practice-question-head-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.cbt-practice-question h2 {
    font-size: calc(1.25rem * var(--cbt-practice-font-scale));
    margin: 0;
    color: #1e293b;
    font-weight: 700;
}

/* 4b. Bookmark Button */
.cbt-practice-bookmark {
    border: 1px solid #e2e8f0;
    background: #fff;
    color: #64748b;
    border-radius: 8px;
    padding: 5px 10px;
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 600;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.cbt-practice-bookmark:hover {
    border-color: #f59e0b;
    background: #fffbeb;
    color: #d97706;
}

.cbt-practice-bookmark.is-bookmarked {
    border-color: #f59e0b;
    background: #fef3c7;
    color: #b45309;
}

.cbt-practice-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 12px 0 16px;
    color: #475569;
    font-size: 0.78rem;
}

.cbt-practice-tags span {
    background: #eef2ff;
    color: #3730a3;
    border-radius: 999px;
    padding: 4px 10px;
    font-weight: 600;
}

.cbt-practice-tags .cbt-practice-question-type {
    font-weight: 800;
    letter-spacing: 0.01em;
}

.cbt-practice-question-type-mcq {
    background: #dbeafe !important;
    color: #1d4ed8 !important;
}

.cbt-practice-question-type-msq {
    background: #ede9fe !important;
    color: #6d28d9 !important;
}

.cbt-practice-question-type-nat {
    background: #dcfce7 !important;
    color: #15803d !important;
}

.cbt-practice-question-text {
    font-size: calc(1.1rem * var(--cbt-practice-font-scale));
    line-height: 1.7;
    margin: 16px 0 20px;
    color: #1e293b;
}

/* Paragraphs inside question text and solution */
.cbt-practice-question-text .cbt-question-para,
.cbt-practice-solution .cbt-question-para {
    margin: 0 0 0.6em;
    line-height: 1.7;
}
.cbt-practice-question-text .cbt-question-para:last-child,
.cbt-practice-solution .cbt-question-para:last-child {
    margin-bottom: 0;
}

/* Code blocks (multi-line programming snippets) */
.cbt-practice-question-text .cbt-code-card,
.cbt-practice-solution .cbt-code-card {
    max-width: 100%;
    margin: 14px 0 18px;
    overflow: hidden;
    border: 1px solid #1e293b;
    border-radius: 12px;
    background: #0f172a;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.2);
}

.cbt-practice-question-text .cbt-code-card-header,
.cbt-practice-solution .cbt-code-card-header {
    display: flex;
    align-items: center;
    gap: 10px;
    min-height: 42px;
    padding: 8px 12px;
    background: #172033;
    color: #cbd5e1;
}

.cbt-practice-question-text .cbt-code-card-dots,
.cbt-practice-solution .cbt-code-card-dots {
    display: flex;
    gap: 5px;
    flex: 0 0 auto;
}

.cbt-practice-question-text .cbt-code-dot,
.cbt-practice-solution .cbt-code-dot {
    display: block;
    width: 9px;
    height: 9px;
    border-radius: 50%;
}

.cbt-practice-question-text .cbt-code-dot.red,
.cbt-practice-solution .cbt-code-dot.red { background: #f87171; }
.cbt-practice-question-text .cbt-code-dot.yellow,
.cbt-practice-solution .cbt-code-dot.yellow { background: #fbbf24; }
.cbt-practice-question-text .cbt-code-dot.green,
.cbt-practice-solution .cbt-code-dot.green { background: #34d399; }

.cbt-practice-question-text .cbt-code-card-lang,
.cbt-practice-solution .cbt-code-card-lang {
    flex: 1 1 auto;
    min-width: 0;
    color: #94a3b8;
    font: 700 0.72rem/1.2 system-ui, sans-serif;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.cbt-practice-question-text .cbt-code-copy-btn,
.cbt-practice-solution .cbt-code-copy-btn {
    position: static;
    flex: 0 0 auto;
    margin: 0 0 0 auto;
    padding: 6px 11px;
    border: 1px solid #475569;
    border-radius: 6px;
    background: #1e293b;
    color: #e2e8f0;
    font: 600 0.78rem/1.2 system-ui, sans-serif;
    cursor: pointer;
    transition: background 0.15s ease, border-color 0.15s ease;
}

.cbt-practice-question-text .cbt-code-copy-btn:hover,
.cbt-practice-solution .cbt-code-copy-btn:hover {
    border-color: #93c5fd;
    background: #334155;
}

.cbt-practice-question-text .cbt-code-copy-btn.copied,
.cbt-practice-solution .cbt-code-copy-btn.copied {
    border-color: #34d399;
    background: #065f46;
    color: #ecfdf5;
}

.cbt-practice-question-text .cbt-code-block,
.cbt-practice-solution .cbt-code-block {
    max-width: 100%;
    background: #0f172a;
    color: #e2e8f0;
    border-radius: 10px;
    padding: 16px 18px;
    margin: 12px 0;
    overflow-x: auto;
    font-family: 'Fira Code', 'Cascadia Code', 'Consolas', 'Courier New', monospace;
    font-size: calc(0.9rem * var(--cbt-practice-font-scale));
    line-height: 1.65;
    white-space: pre;
    border: 0;
    box-shadow: none;
    position: relative;
}
.cbt-practice-question-text .cbt-code-block code,
.cbt-practice-solution .cbt-code-block code {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
    background: none;
    padding: 0;
    border-radius: 0;
}
/* Inline code */
.cbt-practice-question-text .cbt-inline-code,
.cbt-practice-solution .cbt-inline-code,
.cbt-practice-option span .cbt-inline-code {
    background: #eef2ff;
    color: #3730a3;
    border: 1px solid #c7d2fe;
    border-radius: 4px;
    padding: 1px 5px;
    font-family: 'Fira Code', 'Consolas', 'Courier New', monospace;
    font-size: 0.9em;
    word-break: break-all;
}

.cbt-practice-image {
    display: block;
    max-width: 100%;
    height: auto;
    margin: 14px 0;
    border-radius: 6px;
}

/* 4c. Eliminate Hint */
.cbt-practice-eliminate-hint {
    font-size: 0.75rem;
    color: #94a3b8;
    margin: 0 0 8px;
    font-style: italic;
}

.is-answered .cbt-practice-eliminate-hint {
    display: none;
}

/* 5. Options */
.cbt-practice-options {
    border: 0;
    padding: 0;
    margin: 18px 0;
    display: grid;
    gap: 10px;
}

.cbt-practice-nat-label {
    font-weight: 600;
    color: #475569;
}

.cbt-practice-nat-input {
    width: min(100%, 320px);
    box-sizing: border-box;
    border: 1px solid #dbe3ec;
    border-radius: 12px;
    padding: 13px 16px;
    font-size: calc(1rem * var(--cbt-practice-font-scale));
    background: #fff;
}

.cbt-practice-nat-input:focus {
    outline: 3px solid rgba(37, 99, 235, 0.22);
    border-color: #2563eb;
}

.cbt-practice-nat-input.is-correct {
    border-color: #22c55e;
    background: #ecfdf5;
}

.cbt-practice-calculator-btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    border: 1px solid #c4b5fd;
    border-radius: 11px;
    background: linear-gradient(135deg, #f5f3ff, #ede9fe);
    color: #5b21b6;
    padding: 10px 13px;
    cursor: pointer;
    font-size: 0.82rem;
    font-weight: 800;
    box-shadow: 0 5px 12px rgba(124, 58, 237, 0.12);
    transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.cbt-practice-calculator-btn span:first-child {
    display: grid;
    place-items: center;
    width: 23px;
    height: 23px;
    border-radius: 7px;
    background: #7c3aed;
    color: #fff;
    font-size: 0.95rem;
}

.cbt-practice-calculator-btn:hover,
.cbt-practice-calculator-btn:focus-visible {
    background: linear-gradient(135deg, #ede9fe, #ddd6fe);
    box-shadow: 0 8px 16px rgba(124, 58, 237, 0.2);
    transform: translateY(-1px);
}

.cbt-practice-calculator-btn:focus-visible {
    outline: 3px solid rgba(124, 58, 237, 0.25);
    outline-offset: 2px;
}

.cbt-practice-option {
    display: flex;
    align-items: center;
    gap: 12px;
    border: 1px solid #dbe3ec;
    border-radius: 12px;
    padding: 13px 16px;
    cursor: pointer;
    background: #fff;
    transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease, background 0.15s ease, opacity 0.15s ease;
    font-size: calc(1rem * var(--cbt-practice-font-scale));
    position: relative;
    min-width: 0;
}

.cbt-practice-option > span:last-child {
    min-width: 0;
    overflow-wrap: anywhere;
}

.cbt-practice-option:hover {
    background: #f8fafc;
    border-color: #94a3b8;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.06);
}

.cbt-practice-option:has(input:focus-visible) {
    outline: 3px solid rgba(37, 99, 235, 0.22);
    outline-offset: 2px;
}

.cbt-practice-option input {
    accent-color: #2563eb;
    width: 17px;
    height: 17px;
}

.cbt-practice-option-letter {
    font-weight: 700;
    color: #475569;
    min-width: 22px;
}

/* Option Elimination (strike-through) */
.cbt-practice-option.is-eliminated {
    opacity: 0.4;
    text-decoration: line-through;
    background: #f9fafb;
    border-style: dashed;
    pointer-events: auto;
    cursor: pointer;
}

.cbt-practice-option.is-eliminated input {
    pointer-events: none;
}

.cbt-practice-option.is-correct,
.cbt-practice-option.is-answer {
    background: #ecfdf5 !important;
    border-color: #22c55e !important;
    color: #166534 !important;
    font-weight: 600;
    opacity: 1 !important;
    text-decoration: none !important;
}

.cbt-practice-option.is-correct:after {
    content: " ✔ Correct answer";
    font-weight: 700;
    margin-left: auto;
    color: #166534;
}

.cbt-practice-option.is-wrong {
    background: #fef2f2 !important;
    border-color: #ef4444 !important;
    color: #991b1b !important;
    font-weight: 600;
    opacity: 1 !important;
    text-decoration: none !important;
}

.cbt-practice-option.is-wrong:after {
    content: " ✘ Your answer";
    font-weight: 700;
    margin-left: auto;
    color: #991b1b;
}

.cbt-practice-question.is-answered .cbt-practice-show-solution {
    background: #0f62c4;
    border-color: #0f62c4;
    color: #fff;
}

.cbt-practice-answer-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    margin-top: 18px;
}

.cbt-practice-submit {
    border: 0;
    border-radius: 10px;
    padding: 11px 18px;
    background: #f97316;
    color: #fff;
    cursor: pointer;
    font-weight: 700;
    box-shadow: 0 5px 12px rgba(249, 115, 22, 0.2);
    transition: transform 0.15s ease, background 0.15s ease, opacity 0.15s ease;
}

.cbt-practice-submit:hover:not(:disabled) {
    background: #ea580c;
    transform: translateY(-1px);
}

.cbt-practice-submit:disabled {
    cursor: not-allowed;
    opacity: 0.45;
    box-shadow: none;
}

/* Try Again Button */
.cbt-practice-try-again {
    border: 1px solid #93c5fd;
    background: linear-gradient(135deg, #eff6ff, #dbeafe);
    color: #1d4ed8;
    border-radius: 10px;
    padding: 10px 16px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.88rem;
    transition: all 0.15s ease;
}

.cbt-practice-try-again:hover {
    background: linear-gradient(135deg, #dbeafe, #bfdbfe);
    border-color: #60a5fa;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(29, 78, 216, 0.15);
}

.cbt-practice-try-again[hidden] {
    display: none;
}

/* Report Button */
.cbt-practice-report {
    border: 1px solid #e5e7eb;
    background: transparent;
    color: #9ca3af;
    border-radius: 8px;
    padding: 8px 12px;
    cursor: pointer;
    font-size: 0.78rem;
    font-weight: 500;
    margin-left: auto;
    transition: all 0.15s ease;
}

.cbt-practice-report:hover {
    color: #ef4444;
    border-color: #fca5a5;
    background: #fef2f2;
}

.cbt-practice-report.is-reported {
    color: #16a34a;
    border-color: #86efac;
    background: #f0fdf4;
    cursor: default;
}

/* Report Panel */
.cbt-practice-report-panel {
    margin-top: 14px;
    padding: 16px 18px;
    background: #fefce8;
    border: 1px solid #fde68a;
    border-radius: 10px;
}

.cbt-practice-report-panel[hidden] {
    display: none;
}

.cbt-practice-report-panel h4 {
    margin: 0 0 10px;
    font-size: 0.95rem;
    color: #92400e;
}

.cbt-practice-report-panel label {
    display: block;
    font-size: 0.88rem;
    padding: 5px 0;
    cursor: pointer;
    color: #78350f;
}

.cbt-practice-report-panel input[type="radio"] {
    accent-color: #d97706;
    margin-right: 6px;
}

.cbt-practice-report-panel textarea {
    width: 100%;
    box-sizing: border-box;
    margin-top: 8px;
    padding: 8px 10px;
    border: 1px solid #fde68a;
    border-radius: 6px;
    font-size: 0.88rem;
    resize: vertical;
    font-family: inherit;
    background: #fff;
}

.cbt-practice-report-actions {
    display: flex;
    gap: 8px;
    margin-top: 10px;
}

.cbt-practice-report-submit {
    border: 0;
    background: #d97706;
    color: #fff;
    padding: 8px 14px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.82rem;
    cursor: pointer;
    transition: background 0.15s ease;
}

.cbt-practice-report-submit:hover {
    background: #b45309;
}

.cbt-practice-report-cancel {
    border: 1px solid #fde68a;
    background: #fff;
    color: #92400e;
    padding: 8px 14px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.82rem;
    cursor: pointer;
    transition: background 0.15s ease;
}

.cbt-practice-report-cancel:hover {
    background: #fef9c3;
}

.cbt-practice-show-solution[hidden] {
    display: none;
}

.cbt-practice-feedback {
    margin-top: 14px;
    border-radius: 10px;
    padding: 11px 14px;
    font-weight: 700;
}

.cbt-practice-feedback.is-correct {
    background: #ecfdf5;
    color: #166534;
    border: 1px solid #86efac;
}

.cbt-practice-feedback.is-wrong {
    background: #fff7ed;
    color: #9a3412;
    border: 1px solid #fdba74;
}

.cbt-practice-feedback.is-study {
    background: #f5f3ff;
    color: #6d28d9;
    border: 1px solid #c4b5fd;
    font-weight: 600;
}

/* 6. Solution Box */
.cbt-practice-solution {
    margin-top: 18px;
    padding: 18px 20px;
    border-left: 4px solid #22c55e;
    background: linear-gradient(135deg, #ecfdf5, #f0fdf4);
    line-height: 1.7;
    border-radius: 0 8px 8px 0;
    color: #14532d;
}

.cbt-practice-solution h3 {
    margin-top: 0;
    font-size: 1.05rem;
    color: #166534;
}

/* 6a. Personal Notes */
.cbt-practice-notes {
    margin-top: 14px;
    border-top: 1px solid #f1f5f9;
    padding-top: 12px;
}

.cbt-practice-notes-toggle {
    border: 1px solid #e2e8f0;
    background: #f8fafc;
    color: #475569;
    border-radius: 8px;
    padding: 7px 12px;
    cursor: pointer;
    font-size: 0.82rem;
    font-weight: 600;
    transition: all 0.15s ease;
}

.cbt-practice-notes-toggle:hover {
    background: #eef2ff;
    border-color: #c7d2fe;
    color: #4338ca;
}

.cbt-practice-notes-body {
    margin-top: 10px;
}

.cbt-practice-notes-body[hidden] {
    display: none;
}

.cbt-practice-notes-input {
    width: 100%;
    box-sizing: border-box;
    padding: 10px 12px;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    font-size: 0.9rem;
    font-family: inherit;
    resize: vertical;
    background: #fafbff;
    transition: border-color 0.15s ease;
    line-height: 1.5;
}

.cbt-practice-notes-input:focus {
    outline: none;
    border-color: #818cf8;
    box-shadow: 0 0 0 3px rgba(129, 140, 248, 0.15);
}

.cbt-practice-notes-saved {
    display: block;
    margin-top: 4px;
    font-size: 0.75rem;
    color: #16a34a;
    font-weight: 600;
}

.cbt-practice-notes-saved[hidden] {
    display: none;
}

/* 7. Pagination */
.cbt-practice-pagination {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    margin: 28px 0;
}

.cbt-practice-pagination a,
.cbt-practice-chunks a {
    display: inline-block;
    border: 1px solid #cbd5e1;
    border-radius: 6px;
    padding: 11px 16px;
    text-decoration: none;
    background: #fff;
    color: #1d4ed8;
    font-weight: 600;
    transition: all 0.15s ease;
}

.cbt-practice-pagination a:hover,
.cbt-practice-chunks a:hover {
    background: #eff6ff;
    border-color: #3b82f6;
}

/* 8. Palette Sidebar */
.cbt-practice-palette {
    min-width: 0;
    max-width: 100%;
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    padding: 22px;
    position: sticky;
    top: 24px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.cbt-practice-palette h2 {
    font-size: 1.15rem;
    margin-top: 0;
    margin-bottom: 14px;
    color: #0f172a;
}

/* 8a. Palette Filter Tabs */
.cbt-practice-palette-filters {
    display: flex;
    flex-wrap: nowrap;
    gap: 6px;
    margin-bottom: 14px;
    max-width: 100%;
    overflow-x: auto;
    padding: 2px 2px 6px;
    scrollbar-width: thin;
}

.cbt-palette-filter {
    flex: 0 0 auto;
    border: 1px solid #e2e8f0;
    background: #f8fafc;
    color: #64748b;
    border-radius: 999px;
    padding: 5px 10px;
    font-size: 0.72rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s ease;
    white-space: nowrap;
}

.cbt-palette-filter:hover {
    background: #eef2ff;
    border-color: #c7d2fe;
    color: #4338ca;
}

.cbt-palette-filter.is-active {
    background: #2563eb;
    border-color: #2563eb;
    color: #fff;
}

.cbt-palette-filter small {
    display: inline-block;
    background: rgba(255,255,255,0.2);
    border-radius: 999px;
    padding: 1px 5px;
    margin-left: 3px;
    font-size: 0.68rem;
}

.cbt-palette-filter.is-active small {
    background: rgba(255,255,255,0.25);
}

.cbt-practice-jump {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 8px;
    align-items: end;
}

.cbt-practice-jump label {
    grid-column: 1/-1;
    font-size: 0.88rem;
    font-weight: 600;
    color: #475569;
}

.cbt-practice-jump input {
    min-width: 0;
    padding: 9px 12px;
    border: 1px solid #cbd5e1;
    border-radius: 6px;
    font-size: 0.95rem;
}

.cbt-practice-jump button {
    padding: 9px 14px;
    background: #2563eb;
    color: #fff;
    border: 0;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
}

.cbt-practice-jump button:hover {
    background: #1d4ed8;
}

.cbt-practice-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 18px 0;
    max-width: 100%;
}

.cbt-practice-badges a {
    width: 40px;
    height: 36px;
    display: grid;
    place-items: center;
    border-radius: 6px;
    background: #f1f5f9;
    text-decoration: none;
    color: #334155;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.15s ease;
    position: relative;
}

.cbt-practice-badges a:hover {
    background: #e2e8f0;
}

.cbt-practice-badges a.is-correct {
    background: #dcfce7 !important;
    color: #166534 !important;
}

.cbt-practice-badges a.is-wrong {
    background: #fee2e2 !important;
    color: #991b1b !important;
}

.cbt-practice-badges a.is-bookmarked::after {
    content: '★';
    position: absolute;
    top: -3px;
    right: -3px;
    font-size: 0.6rem;
    color: #f59e0b;
    background: #fef3c7;
    border-radius: 50%;
    width: 14px;
    height: 14px;
    display: grid;
    place-items: center;
    line-height: 1;
    border: 1px solid #fde68a;
}

.cbt-practice-chunks {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    max-height: 240px;
    overflow-y: auto;
    padding-top: 10px;
    border-top: 1px solid #f1f5f9;
    max-width: 100%;
}

.cbt-practice-chunks a {
    font-size: 0.82rem;
    padding: 7px 10px;
}

.cbt-practice-chunks a.is-current {
    background: #2563eb !important;
    color: #fff !important;
    border-color: #2563eb !important;
}

/* 8b. Palette Legend */
.cbt-practice-palette-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 14px;
    padding-top: 12px;
    border-top: 1px solid #f1f5f9;
}

.cbt-legend-item {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.72rem;
    color: #64748b;
    font-weight: 500;
}

.cbt-legend-swatch {
    display: inline-block;
    width: 14px;
    height: 12px;
    border-radius: 3px;
    border: 1px solid transparent;
}

.cbt-legend-swatch.is-correct {
    background: #dcfce7;
    border-color: #86efac;
}

.cbt-legend-swatch.is-wrong {
    background: #fee2e2;
    border-color: #fca5a5;
}

.cbt-legend-swatch.is-bookmarked {
    background: #fef3c7;
    border-color: #fde68a;
}

.cbt-legend-swatch.is-unattempted {
    background: #f1f5f9;
    border-color: #cbd5e1;
}

/* 9. Ads */
.cbt-practice-ad {
    min-height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    margin: 18px 0;
}

.cbt-practice-sidebar .cbt-practice-ad {
    min-height: 250px;
}

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

/* 10. Session Summary Modal */
.cbt-practice-summary-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.55);
    backdrop-filter: blur(4px);
    z-index: 99999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.cbt-practice-summary-overlay[hidden] {
    display: none;
}

.cbt-practice-summary-modal {
    background: #fff;
    border-radius: 20px;
    padding: 32px 36px;
    max-width: 520px;
    width: 100%;
    box-shadow: 0 25px 60px rgba(15, 23, 42, 0.2);
    position: relative;
    animation: cbt-modal-in 0.3s ease;
}

@keyframes cbt-modal-in {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.96);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.cbt-practice-summary-close {
    position: absolute;
    top: 14px;
    right: 18px;
    border: none;
    background: none;
    font-size: 1.8rem;
    color: #94a3b8;
    cursor: pointer;
    line-height: 1;
    transition: color 0.15s ease;
}

.cbt-practice-summary-close:hover {
    color: #334155;
}

.cbt-practice-summary-modal h2 {
    margin: 0 0 20px;
    font-size: 1.4rem;
    color: #0f172a;
}

.cbt-practice-summary-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 20px;
}

.cbt-summary-stat {
    text-align: center;
    padding: 14px 8px;
    border-radius: 12px;
    border: 1px solid #e5e7eb;
}

.cbt-summary-stat-value {
    display: block;
    font-size: 1.8rem;
    font-weight: 800;
    line-height: 1.2;
}

.cbt-summary-stat-label {
    display: block;
    font-size: 0.72rem;
    color: #64748b;
    font-weight: 600;
    margin-top: 4px;
}

.cbt-summary-total { background: #f8fafc; }
.cbt-summary-total .cbt-summary-stat-value { color: #334155; }

.cbt-summary-answered { background: #eff6ff; }
.cbt-summary-answered .cbt-summary-stat-value { color: #2563eb; }

.cbt-summary-correct { background: #f0fdf4; }
.cbt-summary-correct .cbt-summary-stat-value { color: #16a34a; }

.cbt-summary-wrong { background: #fef2f2; }
.cbt-summary-wrong .cbt-summary-stat-value { color: #dc2626; }

.cbt-summary-unanswered { background: #f8fafc; }
.cbt-summary-unanswered .cbt-summary-stat-value { color: #64748b; }

/* Accuracy Bar */
.cbt-practice-summary-accuracy {
    margin-bottom: 18px;
}

.cbt-summary-accuracy-bar {
    width: 100%;
    height: 10px;
    background: #e5e7eb;
    border-radius: 999px;
    overflow: hidden;
    margin-bottom: 8px;
}

.cbt-summary-accuracy-fill {
    height: 100%;
    background: linear-gradient(90deg, #22c55e, #16a34a);
    border-radius: 999px;
    transition: width 0.5s ease;
    width: 0%;
}

.cbt-practice-summary-accuracy p {
    margin: 0;
    font-size: 0.9rem;
    color: #475569;
}

.cbt-practice-summary-accuracy strong {
    font-size: 1.2rem;
    color: #16a34a;
}

/* Bookmarks list in summary */
.cbt-practice-summary-bookmarks {
    border-top: 1px solid #f1f5f9;
    padding-top: 14px;
}

.cbt-practice-summary-bookmarks h3 {
    margin: 0 0 6px;
    font-size: 0.95rem;
    color: #0f172a;
}

.cbt-practice-summary-bookmarks p {
    margin: 0;
    font-size: 0.88rem;
    color: #64748b;
}

/* 11. Responsive */
@media (max-width: 860px) {
    .cbt-practice-layout {
        grid-template-columns: 1fr !important;
        gap: 18px !important;
    }
    .cbt-practice-sidebar {
        order: -1;
        width: 100%;
    }
    .cbt-practice-palette {
        position: static;
    }
    .cbt-practice-header {
        align-items: flex-start;
        flex-direction: column;
    }
    .cbt-practice-header-actions {
        width: 100%;
        justify-content: flex-start;
        gap: 8px;
    }
    .cbt-practice-score {
        width: auto;
        text-align: left;
    }
    .cbt-practice-summary-stats {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 520px) {
    .cbt-practice-page {
        padding: 16px 10px !important;
    }
    .cbt-practice-container {
        width: 100% !important;
    }
    .cbt-practice-header {
        padding: 22px 18px;
    }
    .cbt-practice-question {
        padding: 20px 16px;
        border-radius: 14px;
    }
    .cbt-practice-question-text {
        font-size: calc(1rem * var(--cbt-practice-font-scale));
        line-height: 1.6;
    }
    .cbt-practice-question-text .cbt-code-card,
    .cbt-practice-solution .cbt-code-card {
        margin-left: 0;
        margin-right: 0;
        border-radius: 10px;
    }
    .cbt-practice-question-text .cbt-code-block,
    .cbt-practice-solution .cbt-code-block {
        padding: 14px;
        font-size: calc(0.78rem * var(--cbt-practice-font-scale));
        line-height: 1.55;
    }
    .cbt-practice-palette {
        padding: 18px 14px;
    }
    .cbt-practice-palette h2 {
        font-size: 1.05rem;
    }
    .cbt-practice-header-actions {
        align-items: stretch;
        flex-direction: column;
    }
    .cbt-practice-score {
        text-align: center;
    }
    .cbt-practice-question-head {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    .cbt-practice-question-head-actions {
        width: 100%;
        justify-content: flex-end;
    }
    .cbt-practice-summary-modal {
        padding: 24px 20px;
    }
    .cbt-practice-summary-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    .cbt-practice-palette-filters {
        gap: 4px;
    }
    .cbt-palette-filter {
        padding: 4px 8px;
        font-size: 0.68rem;
    }
}