:root {
    --bg: #f4f8ff;
    --bg-soft: #edf4ff;
    --surface: #ffffff;
    --surface-soft: #f7fbff;
    --text: #14294b;
    --text-muted: #6b7f98;
    --primary: #2f7df6;
    --primary-strong: #1f62d6;
    --primary-soft: #dcecff;
    --line: #d7e6f7;
    --line-strong: #bfd8f5;
    --success: #2d8a57;
    --success-soft: rgba(45, 138, 87, 0.1);
    --danger: #d14d63;
    --danger-soft: rgba(209, 77, 99, 0.1);
    --warning: #d97706;
    --warning-soft: rgba(217, 119, 6, 0.12);
    --muted-fill: #eef3f8;
    --shadow: 0 14px 38px rgba(30, 80, 159, 0.08);
    --shadow-soft: 0 8px 22px rgba(22, 55, 112, 0.06);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    overflow-x: hidden;
    font-family: 'Inter', sans-serif;
    color: var(--text);
    line-height: 1.65;
    background:
        radial-gradient(circle at top left, rgba(187, 216, 255, 0.55), transparent 26%),
        linear-gradient(180deg, #fbfdff 0%, var(--bg) 52%, #f6faff 100%);
}

body.no-select {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    display: block;
    max-width: 100%;
}

button,
input,
textarea,
select {
    font: inherit;
}

.page-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.page-content {
    flex: 1;
}

.container {
    width: min(1100px, calc(100% - 40px));
    margin: 0 auto;
}

.breadcrumb {
    padding: 18px 0 8px;
    color: var(--text-muted);
    font-size: 0.92rem;
}

.breadcrumb .container {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
}

.breadcrumb a:hover {
    color: var(--primary-strong);
}

.page-header {
    padding: 18px 0 12px;
}

.page-header .container {
    padding: 28px;
    border: 1px solid var(--line);
    border-radius: 26px;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.98) 0%, rgba(243, 248, 255, 0.98) 100%);
    box-shadow: var(--shadow);
}

.page-header.compact .container {
    display: grid;
    gap: 18px;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    width: fit-content;
    padding: 6px 12px;
    border-radius: 999px;
    background: var(--primary-soft);
    color: var(--primary-strong);
    font-size: 0.8rem;
    font-weight: 700;
}

.page-title {
    max-width: 760px;
    margin-top: 12px;
    font-size: clamp(2rem, 4vw, 3.2rem);
    line-height: 1.04;
    letter-spacing: -0.05em;
    overflow-wrap: anywhere;
    color: var(--text);
}

.section-subtitle {
    max-width: 640px;
    margin-top: 10px;
    color: var(--text-muted);
    font-size: 0.98rem;
}

.section {
    padding: 20px 0 26px;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
}

.card {
    display: grid;
    gap: 10px;
    padding: 22px 20px;
    border-radius: 20px;
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.96);
    box-shadow: var(--shadow-soft);
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
    transform: translateY(-4px);
    border-color: var(--line-strong);
    box-shadow: 0 14px 28px rgba(30, 80, 159, 0.1);
}

.card-title {
    font-size: 1.2rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    color: var(--text);
}

.card-copy {
    color: var(--text-muted);
    font-size: 0.94rem;
}

.card-meta {
    width: fit-content;
    padding: 6px 10px;
    border-radius: 999px;
    color: var(--primary-strong);
    background: var(--primary-soft);
    font-size: 0.76rem;
    font-weight: 700;
}

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

.meta-pill {
    display: grid;
    gap: 4px;
    padding: 14px 16px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.94);
    box-shadow: var(--shadow-soft);
}

.meta-action {
    width: 100%;
    border: 1px solid var(--line);
    text-align: left;
    cursor: pointer;
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.meta-action:hover {
    transform: translateY(-2px);
    border-color: var(--line-strong);
    box-shadow: 0 12px 24px rgba(30, 80, 159, 0.08);
}

.meta-pill span {
    color: var(--text-muted);
    font-size: 0.78rem;
}

.meta-pill strong {
    font-size: 1.02rem;
    letter-spacing: -0.02em;
}

.timer-pill strong {
    color: var(--danger);
}

.timer-pill.warning {
    border-color: rgba(209, 77, 99, 0.28);
    background: rgba(255, 245, 246, 0.98);
    animation: pulse 1s infinite;
}

.save-pill strong {
    color: var(--primary-strong);
}

.save-pill.is-exit strong {
    color: var(--danger);
}

@keyframes pulse {
    0%,
    100% {
        box-shadow: var(--shadow-soft);
    }

    50% {
        box-shadow: 0 0 0 8px rgba(209, 77, 99, 0.08);
    }
}

.question-card,
.result-card,
.summary-card,
.empty-state {
    border: 1px solid var(--line);
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: var(--shadow-soft);
}

.question-card {
    max-width: 860px;
    margin: 0 auto;
    padding: 30px;
}

.question-text {
    font-size: clamp(1.18rem, 2.4vw, 1.5rem);
    font-weight: 700;
    line-height: 1.45;
    letter-spacing: -0.03em;
    color: var(--text);
}

.question-image-wrap {
    margin-top: 22px;
    padding: 16px;
    border: 1px solid var(--line);
    border-radius: 20px;
    background: var(--surface-soft);
}

.question-image {
    width: 100%;
    max-width: 680px;
    height: auto;
    margin: 0 auto;
    border-radius: 14px;
    object-fit: contain;
}

.options-container {
    display: grid;
    gap: 12px;
    margin-top: 24px;
}

.option {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 14px;
    align-items: flex-start;
    width: 100%;
    padding: 16px 18px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: var(--surface);
    color: var(--text);
    cursor: pointer;
    text-align: left;
    transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.option:hover {
    transform: translateY(-2px);
    border-color: var(--line-strong);
    background: #fbfdff;
}

.option.selected {
    border-color: rgba(47, 125, 246, 0.35);
    background: #eef5ff;
    box-shadow: 0 10px 24px rgba(47, 125, 246, 0.08);
}

.option-index {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--bg-soft);
    color: var(--primary-strong);
    font-size: 0.92rem;
    font-weight: 800;
    flex-shrink: 0;
}

.option.selected .option-index {
    background: var(--primary);
    color: #ffffff;
}

.option-copy {
    color: var(--text);
    line-height: 1.6;
}

.quiz-actions,
.action-buttons {
    display: flex;
    gap: 14px;
    justify-content: center;
    max-width: 860px;
    margin: 18px auto 0;
}

.nav-btn,
.submit-btn,
.action-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 12px 18px;
    border-radius: 14px;
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.96);
    color: var(--text);
    font-size: 0.95rem;
    font-weight: 700;
    box-shadow: var(--shadow-soft);
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
    cursor: pointer;
}

.end-btn {
    background: #fff5f6;
    border-color: rgba(209, 77, 99, 0.2);
    color: var(--danger);
}

.end-btn:hover:not(:disabled) {
    background: #ffecef;
    border-color: rgba(209, 77, 99, 0.3);
}

.nav-btn:hover:not(:disabled),
.action-btn:hover,
.submit-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    border-color: var(--line-strong);
    box-shadow: 0 12px 24px rgba(30, 80, 159, 0.08);
}

.nav-btn:disabled,
.submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.nav-btn,
.submit-btn {
    flex: 1 1 0;
    max-width: 280px;
}

.submit-btn,
.action-btn.primary {
    border-color: transparent;
    background: var(--primary);
    color: #ffffff;
}

.submit-btn:hover:not(:disabled),
.action-btn.primary:hover {
    background: var(--primary-strong);
}

.result-hero {
    display: grid;
    gap: 18px;
    padding: 28px;
    border: 1px solid var(--line);
    border-radius: 26px;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.98) 0%, rgba(240, 247, 255, 0.98) 100%);
    box-shadow: var(--shadow);
}

.score-summary {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.score-stack {
    display: grid;
    gap: 8px;
}

.score-caption {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.score-display {
    font-size: clamp(2.4rem, 7vw, 4.3rem);
    font-weight: 800;
    letter-spacing: -0.06em;
    line-height: 1;
}

.score-percent {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 112px;
    min-height: 112px;
    padding: 18px;
    border-radius: 50%;
    border: 10px solid var(--primary-soft);
    color: var(--primary-strong);
    font-size: 1.45rem;
    font-weight: 800;
    background: #ffffff;
}

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

.summary-card {
    padding: 18px;
}

.summary-card span {
    display: block;
    color: var(--text-muted);
    font-size: 0.82rem;
}

.summary-card strong {
    display: block;
    margin-top: 4px;
    font-size: 1.12rem;
    letter-spacing: -0.02em;
}

.result-list {
    display: grid;
    gap: 16px;
}

.result-card {
    padding: 24px;
}

.result-card-header {
    display: grid;
    gap: 6px;
    margin-bottom: 18px;
}

.result-card-meta {
    color: var(--text-muted);
    font-size: 0.84rem;
    font-weight: 700;
}

.answer-row,
.explanation {
    padding: 15px 16px;
    border-radius: 16px;
    border: 1px solid var(--line);
}

.answer-row + .answer-row,
.answer-row + .explanation,
.explanation + .answer-row {
    margin-top: 12px;
}

.answer-row.correct {
    border-color: rgba(45, 138, 87, 0.2);
    background: var(--success-soft);
}

.answer-row.wrong {
    border-color: rgba(209, 77, 99, 0.2);
    background: var(--danger-soft);
}

.answer-row.neutral {
    background: var(--muted-fill);
}

.answer-label,
.explanation-title {
    display: block;
    margin-bottom: 4px;
    font-size: 0.84rem;
    font-weight: 700;
}

.explanation {
    background: #f5f9ff;
}

.empty-state {
    max-width: 860px;
    margin: 0 auto;
    padding: 24px;
    text-align: center;
}

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

.drawer-backdrop {
    position: fixed;
    inset: 0;
    display: none;
    justify-content: flex-end;
    background: rgba(20, 41, 75, 0.3);
    z-index: 9998;
}

.drawer-backdrop.show {
    display: flex;
}

.drawer-panel {
    width: min(420px, 100%);
    height: 100%;
    padding: 24px 20px;
    border-left: 1px solid var(--line);
    background: #ffffff;
    box-shadow: -12px 0 30px rgba(20, 41, 75, 0.12);
    overflow-y: auto;
}

.drawer-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
}

.drawer-title {
    font-size: 1.15rem;
    font-weight: 800;
    letter-spacing: -0.03em;
}

.drawer-subtitle {
    margin-top: 4px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.drawer-close {
    min-height: 40px;
    padding: 8px 12px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: #ffffff;
    color: var(--text);
    font-weight: 700;
    cursor: pointer;
}

.drawer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(64px, 1fr));
    gap: 12px;
    margin-top: 22px;
}

.drawer-item {
    display: grid;
    justify-items: center;
    gap: 4px;
    padding: 12px 8px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: #ffffff;
    color: var(--text);
    cursor: pointer;
}

.drawer-item:hover {
    border-color: var(--line-strong);
    background: #fbfdff;
}

.drawer-item-number {
    font-size: 1rem;
    font-weight: 800;
}

.drawer-item-state {
    font-size: 0.72rem;
    color: var(--text-muted);
}

.drawer-item.answered {
    background: #eef5ff;
    border-color: rgba(47, 125, 246, 0.25);
}

.drawer-item.current {
    background: var(--primary);
    border-color: transparent;
    color: #ffffff;
}

.drawer-item.current .drawer-item-state {
    color: rgba(255, 255, 255, 0.84);
}

.modal-backdrop {
    position: fixed;
    inset: 0;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: rgba(20, 41, 75, 0.34);
    z-index: 9999;
}

.modal-backdrop.show {
    display: flex;
}

.modal-card {
    width: min(100%, 420px);
    padding: 22px;
    border: 1px solid var(--line);
    border-radius: 20px;
    background: #ffffff;
    box-shadow: 0 18px 45px rgba(20, 41, 75, 0.18);
}

.modal-title {
    font-size: 1.08rem;
    font-weight: 800;
    letter-spacing: -0.03em;
}

.modal-message {
    margin-top: 8px;
    color: var(--text-muted);
    line-height: 1.6;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 18px;
}

.modal-btn {
    min-height: 42px;
    padding: 10px 14px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: #ffffff;
    color: var(--text);
    font-weight: 700;
    cursor: pointer;
}

.modal-btn-confirm {
    background: var(--danger);
    border-color: transparent;
    color: #ffffff;
}

.footer {
    padding: 12px 0 34px;
}

.footer .container {
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.96);
    text-align: center;
}

.footer-text {
    color: var(--text-muted);
    font-size: 0.86rem;
}

@media (max-width: 760px) {
    .container {
        width: min(100%, calc(100% - 24px));
    }

    .page-header .container,
    .question-card,
    .result-hero,
    .result-card,
    .summary-card,
    .empty-state,
    .footer .container {
        padding: 22px 18px;
        border-radius: 18px;
    }

    .page-title {
        font-size: clamp(1.45rem, 6.8vw, 2.2rem);
        line-height: 1.08;
    }

    .section-subtitle,
    .card-copy,
    .option-copy,
    .nav-btn,
    .submit-btn,
    .action-btn {
        font-size: 0.92rem;
    }

    .quiz-meta,
    .summary-grid,
    .action-buttons,
    .quiz-actions {
        grid-template-columns: 1fr;
    }

    .quiz-meta {
        display: grid;
    }

    .summary-grid {
        display: grid;
    }

    .score-summary,
    .action-buttons,
    .quiz-actions {
        display: grid;
    }

    .nav-btn,
    .submit-btn,
    .action-btn {
        width: 100%;
        max-width: none;
    }

    .drawer-panel {
        width: 100%;
        padding: 20px 16px;
    }

    .modal-actions {
        display: grid;
    }

    .option {
        padding: 14px 14px;
        gap: 12px;
    }

    .option-index {
        width: 30px;
        height: 30px;
        font-size: 0.84rem;
    }

    .score-percent {
        min-width: 92px;
        min-height: 92px;
        font-size: 1.2rem;
    }
}