:root {
    --navy: #183f50;
    --navy-dark: #0f2833;
    --bg: #f2f2f2;
    --text: #012622;
    --correct: #1e8e3e;
    --incorrect: #d93025;
    --accent: #2f7d95;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-size: 18px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    width: 100%;
    max-width: 880px;
    margin: 0 auto;
    padding: 0 16px;
}

.site-header {
    background: var(--navy);
    color: #fff;
    position: sticky;
    top: 0;
    z-index: 10;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    flex-wrap: wrap;
    gap: 10px;
}

.brand {
    color: #fff;
    font-size: 1.3rem;
    font-weight: 700;
    text-decoration: none;
}

.main-nav a {
    color: #f2f2f2;
    text-decoration: none;
    margin-left: 18px;
    font-weight: 600;
    padding: 6px 2px;
    display: inline-block;
}

.main-nav a:hover { color: #cfe3ea; }

.main-content {
    padding: 28px 16px 60px;
    min-height: 60vh;
}

h1, h2, h3 { color: var(--navy); text-wrap: balance; }

h1 { font-size: 2rem; }

h1.eyebrow {
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.09em;
    text-transform: uppercase;
    color: var(--accent);
    margin: 0 0 6px;
}

.quiz-title {
    font-size: 2rem;
    margin: 0 0 10px;
}

.quiz-meta {
    color: #555;
    font-size: 1.05rem;
    margin-bottom: 24px;
}

.question-card {
    background: #fff;
    border-radius: 10px;
    padding: 18px 20px;
    margin-bottom: 16px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.question-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.answer-option {
    display: flex;
    align-items: center;
    min-height: 44px;
    padding: 12px 14px;
    margin-bottom: 8px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1.05rem;
    cursor: pointer;
    transition: border-color .15s, background .15s;
}

.answer-option:hover { border-color: var(--accent); }

.answer-option input {
    margin-right: 12px;
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.answer-option.selected {
    border-color: var(--accent);
    background: #eaf4f7;
}

.answer-option.correct {
    border-color: var(--correct);
    background: #e6f4ea;
}

.answer-option.incorrect {
    border-color: var(--incorrect);
    background: #fbe9e7;
}

.submit-btn {
    display: block;
    width: 100%;
    padding: 15px;
    font-size: 1.15rem;
    font-weight: 700;
    color: #fff;
    background: var(--navy);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    margin-top: 10px;
    min-height: 48px;
}

.submit-btn:hover { background: var(--navy-dark); }
.submit-btn:disabled { opacity: .5; cursor: not-allowed; }

.submit-btn:focus-visible,
.answer-option input:focus-visible,
.main-nav a:focus-visible,
.archive-table a:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.result-score {
    text-align: center;
    background: #fff;
    border-radius: 10px;
    padding: 28px 20px;
    margin-bottom: 24px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.result-score .big-score {
    font-size: 3rem;
    font-weight: 800;
    color: var(--navy);
    font-variant-numeric: tabular-nums;
}

.distribution {
    background: #fff;
    border-radius: 10px;
    padding: 18px 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.dist-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 6px;
    font-size: 1rem;
}

.dist-label { width: 24px; text-align: right; color: #555; font-variant-numeric: tabular-nums; }

.dist-bar-track {
    flex: 1;
    background: #eee;
    border-radius: 4px;
    overflow: hidden;
    height: 14px;
}

.dist-bar-fill {
    height: 100%;
    background: var(--accent);
    transition: width .4s ease;
}

.dist-pct { width: 46px; color: #555; font-variant-numeric: tabular-nums; }

.archive-table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
    border-radius: 10px;
    overflow: hidden;
    font-size: 1rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.archive-table th, .archive-table td {
    text-align: left;
    padding: 12px 14px;
    border-bottom: 1px solid #eee;
}

.archive-table a {
    color: var(--navy);
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    min-height: 24px;
}
.archive-table a:hover { text-decoration: underline; }

.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.pagination a {
    padding: 10px 16px;
    background: #fff;
    border-radius: 6px;
    text-decoration: none;
    color: var(--navy);
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
    min-height: 44px;
    display: flex;
    align-items: center;
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: #555;
}

.site-footer {
    background: #fff;
    border-top: 1px solid #e2e2e2;
    margin-top: 40px;
    padding: 36px 0 24px;
}

.footer-about h2 {
    font-size: 1.1rem;
    margin-bottom: 12px;
}

.footer-about p {
    color: #444;
    font-size: 1rem;
    margin: 0 0 14px;
}

.footer-about a { color: var(--accent); }

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid #eee;
    color: #777;
    font-size: .85rem;
}

.footer-nav a {
    color: #555;
    text-decoration: none;
    margin-right: 16px;
    font-weight: 600;
}
.footer-nav a:hover { color: var(--navy); }

/* Mobile optimisation: bigger type, roomier tap targets, single-column layout */
@media (max-width: 600px) {
    body { font-size: 17px; }
    .main-content { padding: 20px 14px 48px; }
    h1 { font-size: 1.5rem; }
    .question-title { font-size: 1.08rem; }
    .question-card { padding: 14px 16px; }
    .result-score .big-score { font-size: 2.4rem; }
    .archive-table { font-size: .95rem; }
    .archive-table th, .archive-table td { padding: 10px 8px; }
    .header-inner { padding: 12px; }
    .brand { font-size: 1.1rem; }
    .main-nav a { margin-left: 12px; font-size: .95rem; }
    .footer-bottom { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
    .dist-bar-fill, .answer-option { transition: none; }
}