:root {
    --primary-blue: #004098;
    --header-bg: #e6e9ee;
    --footer-bg: #d9dee6;
    --btn-hover: #003070;
    --text-color: #333;
    --border-color: #999;
    --accent-yellow: #fff9c4;
    --success-green: #4caf50;
    --danger-red: #f44336;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: "Meiryo", "MS PGothic", sans-serif;
}

body {
    background-color: #f0f2f5;
    color: var(--text-color);
    line-height: 1.6;
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* --- Start Screen --- */
#start-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #004098 0%, #002050 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    transition: opacity 0.5s ease;
}

.start-card {
    background: white;
    padding: 3rem;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    text-align: center;
    max-width: 400px;
    width: 90%;
}

.start-card h1 {
    margin-bottom: 1.5rem;
    color: var(--primary-blue);
    font-size: 2rem;
}

.start-card p {
    margin-bottom: 2rem;
    color: #666;
}

#start-btn {
    background: var(--primary-blue);
    color: white;
    border: none;
    padding: 1rem 2rem;
    font-size: 1.2rem;
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.2s, background 0.2s;
    font-weight: bold;
}

#start-btn:hover {
    background: var(--btn-hover);
    transform: scale(1.05);
}

/* --- Exam Screen Layout --- */
#exam-screen {
    display: none; /* Initial state */
    flex-direction: column;
    height: 100vh;
}

header {
    background-color: var(--header-bg);
    padding: 0.5rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px solid var(--border-color);
    font-weight: bold;
}

.header-center {
    flex: 1;
    text-align: center;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.timer {
    font-size: 1.2rem;
    color: #000;
}

#finish-btn, #exit-review-btn {
    background: var(--primary-blue);
    color: white;
    border: none;
    padding: 4px 12px;
    border-radius: 4px;
    cursor: pointer;
}

/* --- Main Content --- */
main {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
    background: white;
    max-width: 1000px;
    margin: 1rem auto;
    width: 95%;
    border: 1px solid #ccc;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    position: relative;
}

.question-num {
    background: #555;
    color: white;
    display: inline-block;
    padding: 2px 8px;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.question-text {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    white-space: pre-wrap;
}

.options-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.option-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.2s;
}

.option-item:hover {
    background-color: #f9f9f9;
}

.option-item.selected {
    background-color: var(--accent-yellow);
    border-color: #bbb;
}

.option-item input {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

/* --- Footer --- */
footer {
    background-color: var(--footer-bg);
    border-top: 2px solid var(--border-color);
    padding: 0.5rem 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-left, .footer-right {
    display: flex;
    gap: 0.5rem;
}

.footer-center {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-btn {
    background: #fff;
    color: var(--text-dark);
    border: 1px solid var(--border-color);
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
    min-width: 80px;
    transition: background-color 0.2s, opacity 0.2s;
}

/* 青いボタンの共通スタイル */
.primary-nav, .secondary-nav, #progress-btn {
    background: var(--primary-blue) !important;
    color: white !important;
}

/* 青いボタンのホバー：透明度50% */
.primary-nav:hover, .secondary-nav:hover, #progress-btn:hover {
    opacity: 0.5;
}

/* 白いボタン（電卓・後で見直す）のホバー：薄い青 */
#calc-toggle-btn:hover, #mark-btn:hover:not(.marked) {
    background-color: #e6f2ff;
}

.nav-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

#mark-btn.marked {
    background-color: var(--danger-red);
    color: white;
}

#mark-btn.marked:hover {
    background-color: #c00000;
}

/* 文字サイズスライダーのつまみの色 */
#font-size-slider {
    cursor: pointer;
}

#font-size-slider::-webkit-slider-thumb {
    background: var(--primary-blue);
}

/* --- Overlays & Modals --- */
.overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
}

.modal {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    width: 95%;
    max-width: 800px;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-content {
    display: flex;
    gap: 2rem;
    margin-top: 1rem;
}

.progress-grid-container {
    flex: 1;
}

.progress-grid {
    display: grid;
    grid-template-columns: repeat(10, 1fr);
    gap: 8px;
}

.progress-item {
    aspect-ratio: 1;
    border: 1px solid #ccc;
    background-color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: bold;
    position: relative;
}

.progress-item.answered {
    background-color: #a5d6a7; /* Light Green */
}

.progress-item.marked {
    border: 2px solid var(--danger-red) !important;
}

.progress-item.marked::after {
    content: "✓";
    position: absolute;
    top: -4px;
    right: 2px;
    color: var(--danger-red);
    font-size: 12px;
    font-weight: bold;
}

.progress-item.current {
    border: 4px solid #ffd600 !important;
}

/* Legend */
.legend {
    width: 120px;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    font-size: 0.85rem;
    padding-left: 1rem;
    border-left: 1px solid #ddd;
}

.legend-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    text-align: center;
}

.legend-box {
    width: 40px;
    height: 40px;
    border: 1px solid #ccc;
}

/* Calculator specific */
#calc-container {
    display: none;
    position: absolute;
    width: 260px;
    height: 400px; /* ヘッダー分を考慮 */
    background: white;
    border: 1px solid #333;
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
    z-index: 1500;
    overflow: hidden;
    border-radius: 4px;
}

#calc-container iframe {
    width: 100%;
    height: calc(100% - 28px); /* ヘッダーの高さ分引く */
    border: none;
}

/* Results Screen */
#results-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: white;
    z-index: 2100;
    overflow-y: auto;
    padding: 2rem 0;
}

.result-card {
    background: white;
    padding: 2.5rem;
    border-radius: 12px;
    width: 95%;
    max-width: 800px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
}

.pass { color: var(--success-green); font-size: 3rem; }
.fail { color: var(--danger-red); font-size: 3rem; }

/* Responsive */
@media (max-width: 600px) {
    main { padding: 1rem; margin: 0.5rem; }
    .question-text { font-size: 1rem; }
    .nav-btn { padding: 6px 10px; min-width: 60px; font-size: 0.8rem; }
    .progress-grid { grid-template-columns: repeat(6, 1fr); }
    header { padding: 0.5rem; font-size: 0.9rem; }
    .header-right { gap: 0.5rem; }
}

/* --- Printing --- */
@page {
    size: A4 portrait;
    margin: 10mm;
}

@media print {
    .no-print, header, footer, main, #calc-container, .overlay, #progress-overlay, #confirm-overlay { display: none !important; }
    body { background: white !important; font-size: 10pt; overflow: visible !important; height: auto !important; position: static !important; }
    #results-overlay { display: block !important; position: static !important; width: 100% !important; height: auto !important; padding: 0 !important; margin: 0 !important; background: white !important; overflow: visible !important; box-shadow: none !important; }
    .result-card { display: block !important; position: relative !important; width: 100% !important; max-width: none !important; padding: 0 !important; margin: 0 !important; background: white !important; box-shadow: none !important; border: none !important; text-align: left !important; }
    .score-report-page, .detailed-results-page { padding: 10mm !important; box-sizing: border-box !important; width: 100% !important; }
    .result-card h1 { text-align: center; font-size: 18pt; margin-bottom: 5mm; }
    #exam-date-display { text-align: center; font-size: 10pt !important; margin-bottom: 5mm !important; }
    .score-summary-table { width: 100% !important; margin-bottom: 10mm !important; }
    .score-summary-table td { padding: 4px 10px !important; font-size: 10pt !important; }
    #score-chart { max-width: 100% !important; height: 300px !important; display: block !important; margin: 0 auto !important; }
    #results-blocks-container { gap: 0 !important; margin-top: 2mm !important; }
    table { width: 100%; border-collapse: collapse; table-layout: fixed; }
    th { background-color: #eee !important; -webkit-print-color-adjust: exact; font-size: 7.5pt !important; border: 1px solid #000 !important; padding: 4px 2px !important; }
    #total-score-display { padding: 10px !important; font-size: 1.5rem !important; margin-bottom: 0 !important; }
    #total-score-display span { font-size: 1rem !important; }
    #radar-chart-wrapper { padding: 10px !important; max-width: 400px !important; border: none !important; }
    td { border: 1px solid #000 !important; padding: 2px 1px !important; font-size: 7.5pt !important; line-height: 1.1; }
    tr { page-break-inside: avoid; }
    .page-break-after { page-break-after: always !important; break-after: page !important; }
    .print-page-title { display: block !important; text-align: center; font-size: 14pt !important; margin: 0 0 5mm 0 !important; color: #333; }
    .detailed-results-page .print-page-title { margin-top: 0 !important; }
    #result-message { display: none !important; }
}

.is-generating-pdf .no-print, .is-generating-pdf header, .is-generating-pdf footer, .is-generating-pdf main, .is-generating-pdf #calc-container, .is-generating-pdf .overlay, .is-generating-pdf #progress-overlay, .is-generating-pdf #confirm-overlay { display: none !important; }
body.is-generating-pdf { background: white !important; font-size: 10pt; overflow: visible !important; height: auto !important; position: static !important; }
.is-generating-pdf #results-overlay { display: block !important; position: static !important; width: 100% !important; height: auto !important; padding: 0 !important; margin: 0 !important; background: white !important; overflow: visible !important; box-shadow: none !important; }
.is-generating-pdf .result-card { display: block !important; position: relative !important; width: 100% !important; max-width: none !important; padding: 0 !important; margin: 0 !important; background: white !important; box-shadow: none !important; border: none !important; text-align: left !important; }
.is-generating-pdf .score-report-page, .is-generating-pdf .detailed-results-page { padding: 10mm !important; box-sizing: border-box !important; width: 100% !important; }
.is-generating-pdf .result-card h1 { text-align: center; font-size: 18pt; margin-bottom: 5mm; }
.is-generating-pdf #exam-date-display { text-align: center; font-size: 10pt !important; margin-bottom: 5mm !important; }
.is-generating-pdf .score-summary-table { width: 100% !important; margin-bottom: 10mm !important; }
.is-generating-pdf .score-summary-table td { padding: 4px 10px !important; font-size: 10pt !important; }
.is-generating-pdf #score-chart { max-width: 100% !important; height: 300px !important; display: block !important; margin: 0 auto !important; }
.is-generating-pdf #results-blocks-container { gap: 0 !important; margin-top: 2mm !important; }
.is-generating-pdf table { width: 100%; border-collapse: collapse; table-layout: fixed; }
.is-generating-pdf th { background-color: #eee !important; -webkit-print-color-adjust: exact; font-size: 7.5pt !important; border: 1px solid #000 !important; padding: 4px 2px !important; }
.is-generating-pdf #total-score-display { padding: 10px !important; font-size: 1.5rem !important; margin-bottom: 0 !important; }
.is-generating-pdf #total-score-display span { font-size: 1rem !important; }
.is-generating-pdf #radar-chart-wrapper { padding: 10px !important; max-width: 400px !important; border: none !important; }
.is-generating-pdf td { border: 1px solid #000 !important; padding: 2px 1px !important; font-size: 7.5pt !important; line-height: 1.1; }
.is-generating-pdf tr { page-break-inside: avoid; }
.is-generating-pdf .page-break-after { page-break-after: always !important; break-after: page !important; }
.is-generating-pdf .print-page-title { display: block !important; text-align: center; font-size: 14pt !important; margin: 0 0 5mm 0 !important; color: #333; }
.is-generating-pdf .detailed-results-page .print-page-title { margin-top: 0 !important; }
.is-generating-pdf #result-message { display: none !important; }

/* 画面表示時は印刷用のタイトルを隠す */
.print-page-title {
    display: none;
}