:root {
    --review-surface: color-mix(in srgb, var(--card-bg) 88%, transparent);
    --review-surface-strong: color-mix(in srgb, var(--card-bg) 96%, var(--bg-main) 4%);
    --review-surface-alt: color-mix(in srgb, var(--glass-bg) 74%, var(--bg-main) 26%);
    --review-border-strong: color-mix(in srgb, var(--border) 68%, var(--primary) 32%);
    --review-shadow: 0 22px 44px rgba(15, 23, 42, 0.18);
    --review-shadow-soft: 0 12px 28px rgba(15, 23, 42, 0.12);
    --review-hover: color-mix(in srgb, var(--primary-soft) 60%, var(--card-bg) 40%);
    --review-chip-bg: color-mix(in srgb, var(--primary-soft) 72%, transparent);
    --review-accent-bg: color-mix(in srgb, var(--accent-soft) 78%, var(--card-bg) 22%);
    --review-success-bg: color-mix(in srgb, var(--success-soft) 74%, var(--card-bg) 26%);
    --review-danger-bg: color-mix(in srgb, var(--danger-soft) 74%, var(--card-bg) 26%);
    --review-warning-bg: color-mix(in srgb, var(--warning-soft) 74%, var(--card-bg) 26%);
}

* {
    box-sizing: border-box;
}

html,
body {
    min-height: 100%;
}

body {
    font-family: var(--font-body);
    margin: 0 auto;
    padding: 28px 16px 48px;
    max-width: 1080px;
    background: linear-gradient(180deg, #ffffff 0%, var(--bg) 100%);
    color: var(--text-main);
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
}

h1 {
    margin: 0 0 8px;
    text-align: center;
    font-size: clamp(1.9rem, 2.8vw, 2.4rem);
    line-height: 1.15;
}

.subtitle {
    max-width: 760px;
    margin: 0 auto 18px;
    text-align: center;
    font-size: 0.96rem;
    line-height: 1.65;
    color: var(--text-sub);
}

.top-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
    margin: 8px 0 14px;
}

.ghost-btn {
    border-radius: 999px;
    padding: 10px 15px;
    border: 1px solid var(--review-border-strong);
    background: var(--review-surface-strong);
    color: var(--text-main);
    font-weight: 700;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 7px;
    text-decoration: none;
    box-shadow: var(--review-shadow-soft);
    transition: transform 0.16s ease, border-color 0.16s ease, background 0.16s ease;
}

.ghost-btn:hover {
    transform: translateY(-1px);
    background: var(--review-hover);
    border-color: var(--primary);
}

.identity-bar {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-items: center;
    margin: 0 0 18px;
    padding: 12px 14px;
    border-radius: 18px;
    border: 1px solid var(--review-border-strong);
    background: var(--review-surface-alt);
    box-shadow: var(--review-shadow-soft);
    font-size: 0.92rem;
}

.identity-label {
    font-weight: 800;
    color: var(--text-main);
}

.layout {
    display: grid;
    grid-template-columns: minmax(320px, 1.05fr) minmax(0, 1.4fr);
    gap: 16px;
    align-items: start;
}

.card {
    background: var(--review-surface);
    border-radius: 24px;
    border: 1px solid var(--border);
    padding: 18px;
    box-shadow: var(--review-shadow);
    backdrop-filter: blur(10px);
}

.card h2 {
    margin: 0 0 8px;
    font-size: 1.08rem;
}

.card p {
    margin: 0;
    font-size: 0.9rem;
    line-height: 1.55;
    color: var(--text-sub);
}

.section-hint {
    margin-bottom: 12px;
}

.status-text {
    margin-top: 6px;
    font-size: 0.86rem;
    color: var(--text-sub);
}

.status-text.error {
    color: var(--danger);
}

.status-text.success {
    color: var(--success);
}

.selection-panel {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 10px;
}

.filter-row {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    align-items: end;
}

.field-label {
    display: flex;
    flex-direction: column;
    gap: 6px;
    min-width: 128px;
    font-size: 0.84rem;
    color: var(--text-sub);
}

.field-label.compact {
    min-width: 96px;
}

.field-control {
    min-width: 120px;
    padding: 9px 11px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: var(--input-bg, var(--review-surface-strong));
    color: var(--text-main);
    font: inherit;
    transition: border-color 0.16s ease, box-shadow 0.16s ease, background 0.16s ease;
}

.field-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px var(--primary-soft);
}

.compact-input {
    width: 84px;
    min-width: 84px;
}

.selection-box {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    align-items: center;
    padding: 12px 13px;
    border-radius: 18px;
    border: 1px dashed var(--accent-dark);
    background: var(--review-accent-bg);
}

.selection-title {
    font-size: 0.92rem;
    color: var(--text-main);
}

.radio-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 11px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: var(--review-surface-strong);
    color: var(--text-main);
    font-size: 0.84rem;
}

.radio-chip input {
    margin: 0;
    accent-color: var(--primary);
}

.btn {
    border-radius: 999px;
    padding: 9px 13px;
    border: 1px solid var(--border);
    background: var(--review-surface-strong);
    color: var(--text-main);
    font-size: 0.86rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition: transform 0.16s ease, border-color 0.16s ease, background 0.16s ease;
}

.btn:hover {
    transform: translateY(-1px);
    background: var(--review-hover);
    border-color: var(--primary);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-primary {
    border-color: transparent;
    background: linear-gradient(135deg, var(--primary), var(--accent-dark));
    color: #fff;
    box-shadow: 0 10px 22px color-mix(in srgb, var(--primary) 45%, transparent);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--accent-dark), var(--primary));
    color: #fff;
}

.btn-ghost {
    background: transparent;
}

.quiz-list {
    margin-top: 10px;
    max-height: 460px;
    overflow-y: auto;
    padding-right: 4px;
}

.quiz-list::-webkit-scrollbar {
    width: 8px;
}

.quiz-list::-webkit-scrollbar-thumb {
    border-radius: 999px;
    background: color-mix(in srgb, var(--border) 65%, transparent);
}

.quiz-item {
    border-radius: 16px;
    border: 1px solid var(--border);
    padding: 12px 14px;
    margin-bottom: 8px;
    background: var(--review-surface-strong);
    cursor: pointer;
    transition: transform 0.15s ease, background 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
    font-size: 0.88rem;
}

.quiz-item-top {
    display: flex;
    align-items: center;
    gap: 12px;
}

.quiz-item-main {
    min-width: 0;
    flex: 1;
}

.quiz-select-indicator {
    width: 24px;
    height: 24px;
    border-radius: 999px;
    border: 1px solid var(--review-border-strong);
    background: color-mix(in srgb, var(--card-bg) 84%, transparent);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.82rem;
    font-weight: 800;
    color: #fff;
    flex-shrink: 0;
}

.quiz-item.is-selected .quiz-select-indicator {
    background: linear-gradient(135deg, var(--primary), var(--accent-dark));
    border-color: transparent;
}

.quiz-start-btn {
    flex-shrink: 0;
}

.quiz-item:hover {
    transform: translateY(-1px);
    background: var(--review-hover);
    box-shadow: var(--review-shadow-soft);
    border-color: var(--primary);
}

.quiz-item.active {
    border-color: var(--accent-dark);
    background: var(--review-accent-bg);
    box-shadow: 0 0 0 1px color-mix(in srgb, var(--accent-dark) 60%, transparent), var(--review-shadow-soft);
}

.quiz-title {
    font-weight: 700;
    margin-bottom: 4px;
}

.quiz-meta,
.muted,
.progress {
    color: var(--text-sub);
}

.pill {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 700;
    background: var(--review-chip-bg);
    color: var(--text-main);
    margin-left: 6px;
    border: 1px solid color-mix(in srgb, var(--primary-soft) 68%, transparent);
}

.leaderboard {
    margin: 14px 0 18px;
    padding: 16px;
    border-radius: 22px;
    background:
        linear-gradient(135deg, color-mix(in srgb, var(--accent-soft) 62%, transparent), transparent 55%),
        linear-gradient(160deg, color-mix(in srgb, var(--primary-soft) 55%, transparent), var(--review-surface-strong));
    border: 1px solid var(--review-border-strong);
    box-shadow: var(--review-shadow);
}

.leaderboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 10px;
}

.leaderboard h2 {
    margin: 0;
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.leaderboard-actions {
    display: flex;
    gap: 8px;
    align-items: center;
    flex-wrap: wrap;
}

.leaderboard-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 10px;
}

.leaderboard-item {
    padding: 10px 12px;
    border-radius: 18px;
    background: color-mix(in srgb, var(--card-bg) 88%, transparent);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: var(--review-shadow-soft);
}

.leader-info-name {
    font-weight: 800;
    color: var(--text-main);
}

.leader-avatar {
    width: 42px;
    height: 42px;
    border-radius: 14px;
    background: linear-gradient(135deg, color-mix(in srgb, var(--primary) 75%, #ffffff 25%), var(--accent-dark));
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    color: #fff;
    border: 1px solid color-mix(in srgb, var(--primary) 45%, transparent);
    overflow: hidden;
    flex-shrink: 0;
}

.leader-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.rank-badge {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    color: #fff;
    box-shadow: var(--review-shadow-soft);
}

.rank-1 {
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
}

.rank-2 {
    background: linear-gradient(135deg, #94a3b8, #64748b);
}

.rank-3 {
    background: linear-gradient(135deg, #d4a373, #9c6644);
}

.rank-4,
.rank-5 {
    background: linear-gradient(135deg, var(--primary), color-mix(in srgb, var(--primary) 62%, #ffffff 38%));
}

.leaderboard-meta {
    font-size: 0.82rem;
    color: var(--text-sub);
}

.flash-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

.flash-title {
    font-weight: 800;
}

.question-box {
    border-radius: 18px;
    border: 1px solid var(--border);
    padding: 16px 16px 18px;
    background: var(--review-surface-strong);
    margin-bottom: 12px;
    min-height: 88px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.question-number {
    display: inline-flex;
    align-items: center;
    align-self: flex-start;
    padding: 4px 10px;
    border-radius: 999px;
    background: var(--review-chip-bg);
    border: 1px solid color-mix(in srgb, var(--primary-soft) 68%, transparent);
    font-weight: 800;
    font-size: 0.82rem;
    color: var(--text-main);
}

.question-text-body {
    font-size: 1rem;
    line-height: 1.72;
    white-space: pre-line;
    overflow-wrap: anywhere;
    word-break: keep-all;
    color: var(--text-main);
}

.question-media {
    margin-bottom: 12px;
    border-radius: 18px;
    border: 1px solid var(--border);
    background: color-mix(in srgb, var(--card-bg) 92%, transparent);
    padding: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.question-media img {
    display: block;
    width: 100%;
    max-height: min(46vh, 360px);
    object-fit: contain;
    border-radius: 12px;
}

.question-selection-hint,
.selection-count {
    margin: 0 0 10px;
    font-size: 0.84rem;
    color: var(--text-sub);
}

.question-source-row {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    margin: -2px 0 12px;
}

.question-source-title {
    font-size: 0.84rem;
    font-weight: 700;
    color: var(--text-sub);
}

.options-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    margin-bottom: 10px;
}

.option-btn {
    border-radius: 18px;
    border: 1px solid var(--border);
    padding: 11px 13px;
    background: var(--review-surface-strong);
    color: var(--text-main);
    font-size: 0.92rem;
    cursor: pointer;
    text-align: left;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: transform 0.14s ease, border-color 0.14s ease, background 0.14s ease, box-shadow 0.14s ease;
}

.option-btn:hover {
    transform: translateY(-1px);
    background: var(--review-hover);
    border-color: var(--primary);
}

.option-btn input[type="checkbox"] {
    margin: 0;
    accent-color: var(--primary);
}

.option-btn span.label {
    font-weight: 800;
    font-size: 0.8rem;
    color: var(--text-sub);
}

.option-btn.selected {
    border-color: var(--primary);
    background: var(--review-hover);
    box-shadow: 0 0 0 4px var(--primary-soft);
}

.option-btn.correct {
    border-color: color-mix(in srgb, var(--success) 70%, transparent);
    background: var(--review-success-bg);
}

.option-btn.wrong {
    border-color: color-mix(in srgb, var(--danger) 70%, transparent);
    background: var(--review-danger-bg);
}

.flash-controls,
.question-multi-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
}

.question-multi-actions {
    margin-bottom: 10px;
}

.feedback {
    margin-top: 8px;
    font-size: 0.92rem;
    font-weight: 700;
}

.feedback.correct {
    color: var(--success);
}

.feedback.wrong {
    color: var(--danger);
}

.review-modal {
    position: fixed;
    inset: 0;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: rgba(15, 23, 42, 0.58);
    backdrop-filter: blur(8px);
    z-index: 1200;
}

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

.review-modal-card {
    position: relative;
    width: min(640px, 100%);
    max-height: min(88vh, 760px);
    overflow: auto;
    padding: 24px;
    border-radius: 26px;
    border: 1px solid var(--review-border-strong);
    background:
        linear-gradient(165deg, color-mix(in srgb, var(--card-bg) 94%, transparent), color-mix(in srgb, var(--glass-bg) 82%, var(--bg-main) 18%));
    box-shadow: 0 32px 80px rgba(15, 23, 42, 0.3);
}

.review-modal-close {
    position: absolute;
    top: 14px;
    right: 14px;
    width: 38px;
    height: 38px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--review-surface-strong);
    color: var(--text-main);
    font-size: 1.2rem;
    cursor: pointer;
}

.review-modal-eyebrow {
    display: inline-flex;
    align-items: center;
    padding: 5px 10px;
    border-radius: 999px;
    background: var(--review-chip-bg);
    border: 1px solid color-mix(in srgb, var(--primary-soft) 68%, transparent);
    font-size: 0.8rem;
    font-weight: 800;
    color: var(--text-main);
}

.review-modal-title {
    margin: 12px 0 8px;
    font-size: clamp(1.5rem, 2.8vw, 2rem);
}

.review-modal-subtitle {
    margin: 0;
    color: var(--text-sub);
    line-height: 1.6;
}

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

.review-result-stat {
    padding: 14px 12px;
    border-radius: 18px;
    border: 1px solid var(--border);
    background: var(--review-surface-strong);
}

.review-result-label {
    display: block;
    font-size: 0.78rem;
    color: var(--text-sub);
    margin-bottom: 6px;
}

.review-result-stat strong {
    font-size: 1.18rem;
    color: var(--text-main);
}

.review-result-note {
    margin-top: 14px;
    padding: 12px 14px;
    border-radius: 16px;
    background: var(--review-accent-bg);
    border: 1px solid color-mix(in srgb, var(--accent-dark) 30%, transparent);
    color: var(--text-main);
    font-size: 0.9rem;
    line-height: 1.55;
}

.review-result-list-wrap {
    margin-top: 16px;
}

.review-result-list-wrap h3 {
    margin: 0 0 10px;
    font-size: 1rem;
}

.review-result-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.review-result-item {
    padding: 12px 14px;
    border-radius: 16px;
    border: 1px solid var(--border);
    background: var(--review-surface-strong);
}

.review-result-item strong {
    display: block;
    margin-bottom: 4px;
}

.review-result-item span {
    font-size: 0.84rem;
    color: var(--text-sub);
    line-height: 1.5;
}

.review-modal-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 20px;
}

#analysisContent ul {
    margin-top: 8px;
    margin-bottom: 6px;
    padding-left: 1.2em;
}

#analysisContent li {
    margin-bottom: 4px;
}

@media (max-width: 900px) {
    body {
        padding-top: 20px;
    }

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

@media (max-width: 720px) {
    .card,
    .leaderboard {
        border-radius: 20px;
        padding: 16px;
    }

    .filter-row,
    .selection-box,
    .identity-bar,
    .leaderboard-header,
    .flash-header {
        align-items: stretch;
    }

    .field-label,
    .field-label.compact,
    .field-control {
        width: 100%;
        min-width: 0;
    }

    .compact-input {
        width: 100%;
    }

    .options-grid {
        grid-template-columns: 1fr;
    }

    .review-result-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .btn,
    .ghost-btn,
    .radio-chip {
        width: 100%;
    }

    .review-modal-card {
        padding: 20px 16px 16px;
    }

    .review-modal-actions {
        flex-direction: column;
    }
}