:root {
    --color-bg: #F8F9FA;
    --color-surface: #FFFFFF;
    --color-border: #E2E8F0;
    --color-text: #0F172A;
    --color-text-sub: #64748B;
    --color-primary: #1A365D;
    --color-primary-hover: #142B4A;
    --color-danger: #E53E3E;
    --radius: 8px;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--color-bg);
    color: var(--color-text);
    font-family: "Noto Sans JP", "Hiragino Sans", "Meiryo", sans-serif;
    line-height: 1.7;
}

.exam-shell {
    max-width: 720px;
    margin: 0 auto;
    padding: 0 16px 64px;
}

.exam-header {
    text-align: center;
    margin: 0 -16px 24px;
    padding: 16px;
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
}

.exam-header h1 {
    font-size: 1.1rem;
    color: var(--color-text-sub);
    font-weight: 600;
    margin: 0;
}

.exam-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    padding: 24px;
    margin-bottom: 20px;
}

.exam-title {
    font-size: 1.3rem;
    margin: 0 0 16px;
}

.exam-title--error {
    color: var(--color-danger);
}

.exam-error-message {
    color: var(--color-text);
}

.exam-lead {
    color: var(--color-text-sub);
    margin-bottom: 24px;
}

.exam-field {
    margin-bottom: 20px;
}

.exam-field label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
}

.exam-field input[type="text"],
.exam-field input[type="date"],
.exam-field select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 1rem;
    color: var(--color-text);
    background: var(--color-surface);
}

.exam-errors {
    background: #FED7D7;
    color: #9B2C2C;
    border-radius: var(--radius);
    padding: 12px 16px;
    margin-bottom: 20px;
}

.exam-errors ul {
    margin: 0;
    padding-left: 20px;
}

.exam-progress {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--color-text-sub);
    font-size: 0.9rem;
    margin-bottom: 12px;
}

.exam-progress-bar {
    height: 6px;
    background: var(--color-border);
    border-radius: 999px;
    overflow: hidden;
    margin-bottom: 24px;
}

.exam-progress-bar-fill {
    height: 100%;
    background: var(--color-primary);
}

.exam-question {
    padding: 18px 0;
    border-bottom: 1px solid var(--color-border);
}

.exam-question:last-child {
    border-bottom: none;
}

.exam-question-no {
    display: inline-block;
    font-size: 0.8rem;
    color: var(--color-text-sub);
    margin-bottom: 6px;
}

.exam-question-text {
    font-size: 1rem;
    margin-bottom: 12px;
}

.exam-scale {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}

.exam-scale-option {
    display: block;
}

.exam-scale-option input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.exam-scale-option span {
    display: block;
    text-align: center;
    padding: 10px 4px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 0.78rem;
    color: var(--color-text-sub);
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s, color 0.15s;
}

.exam-scale-option input:checked + span {
    border-color: var(--color-primary);
    background: var(--color-primary);
    color: #fff;
}

.exam-actions {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    margin-top: 24px;
}

.exam-button {
    display: inline-block;
    padding: 12px 28px;
    border-radius: var(--radius);
    border: none;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    text-align: center;
}

.exam-button--primary {
    background: var(--color-primary);
    color: #fff;
    margin-left: auto;
}

.exam-button--primary:hover {
    background: var(--color-primary-hover);
}

.exam-button--secondary {
    background: var(--color-surface);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.exam-note {
    font-size: 0.8rem;
    color: var(--color-text-sub);
    margin-top: 24px;
}

.exam-terms-heading {
    font-size: 1rem;
    margin: 0 0 8px;
    color: var(--color-text);
}

.terms-scrollbox {
    max-height: 160px;
    overflow-y: auto;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 16px 20px;
    background: var(--color-bg);
    font-size: 0.8rem;
    color: var(--color-text-sub);
    line-height: 1.7;
}

.terms-agree-field label {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
}

.terms-agree-field input[type="checkbox"] {
    width: auto;
    margin-top: 3px;
}

.exam-complete-icon {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 12px;
}

@media (max-width: 480px) {
    .exam-scale {
        grid-template-columns: repeat(2, 1fr);
    }
}

.exam-choice-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.exam-choice-option {
    display: block;
}

.exam-choice-option input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.exam-choice-option span {
    display: block;
    padding: 10px 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 0.9rem;
    color: var(--color-text);
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s, color 0.15s;
}

.exam-choice-option input:checked + span {
    border-color: var(--color-primary);
    background: var(--color-primary);
    color: #fff;
}

.exam-choice-option input:disabled:not(:checked) + span {
    opacity: 0.45;
    cursor: not-allowed;
}

.exam-multi-select-hint {
    font-size: 0.82rem;
    color: var(--color-text-sub);
    margin: -4px 0 8px;
    font-weight: 600;
}

.exam-multi-select-count {
    color: var(--color-primary);
}

/* ===== 未回答の設問を分かりやすく示す（quiz.php / quiz-behavior.js） ===== */
.exam-question { scroll-margin-top: 90px; }
.exam-question.is-missing {
    border: 2px solid #E53E3E;
    border-radius: var(--radius);
    background: #FFF5F5;
    padding: 12px 12px 14px;
    margin-left: -12px;
    margin-right: -12px;
}
.exam-missing-badge {
    display: none;
    margin-left: 8px;
    padding: 1px 10px;
    border-radius: 999px;
    background: #E53E3E;
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    vertical-align: middle;
}
.exam-question.is-missing .exam-missing-badge { display: inline-block; }

.exam-missing-banner {
    border: 2px solid #E53E3E;
    background: #FFF5F5;
    border-radius: var(--radius);
    padding: 14px 16px;
    margin-bottom: 16px;
}
.exam-missing-banner[hidden] { display: none; }
.exam-missing-title { font-weight: 800; color: #C53030; font-size: 1rem; }
.exam-missing-hint { margin: 4px 0 10px; font-size: 0.85rem; color: #742A2A; }
.exam-missing-list { display: flex; flex-wrap: wrap; gap: 8px; }
.exam-missing-link {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 999px;
    background: #E53E3E;
    color: #fff;
    font-weight: 700;
    font-size: 0.85rem;
    text-decoration: none;
}
.exam-missing-link:hover { background: #C53030; }

/* 1ページの目安時間（超過しても止まらない） */
.guide-timer {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 4px 12px;
    padding: 8px 12px;
    margin-bottom: 14px;
    border-radius: var(--radius);
    background: #EDF2F7;
    color: #2D3748;
    font-size: 0.85rem;
}
.guide-timer-label { font-weight: 700; }
.guide-timer-value { font-variant-numeric: tabular-nums; font-weight: 700; }
.guide-timer-note { color: #718096; font-size: 0.78rem; }
.guide-timer.is-over { background: #FEFCBF; color: #744210; }
.guide-timer.is-over .guide-timer-note { color: #744210; }

/* 回答状況の一覧 */
.qnav { margin: 18px 0 8px; border: 1px solid var(--color-border); border-radius: var(--radius); padding: 8px 12px; background: #F8FAFC; }
.qnav summary { cursor: pointer; font-weight: 700; font-size: 0.9rem; }
.qnav-hint { margin: 8px 0; font-size: 0.8rem; color: var(--color-text-sub); }
.qnav-grid { display: flex; flex-wrap: wrap; gap: 6px; }
.qnav-item {
    min-width: 34px;
    padding: 4px 6px;
    text-align: center;
    font-size: 0.78rem;
    border-radius: 6px;
    border: 1px solid #CBD5E0;
    background: #fff;
    color: #4A5568;
    text-decoration: none;
    font-variant-numeric: tabular-nums;
}
.qnav-item.is-done { background: #C6F6D5; border-color: #68D391; color: #22543D; }
.qnav-item.is-here { box-shadow: 0 0 0 2px #2B6CB0; }
.qnav-item.is-missing { background: #FED7D7; border-color: #E53E3E; color: #9B2C2C; font-weight: 800; }

/* ===== 言語タブ（受検者画面の言語切り替え） ===== */
.lang-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: flex-end;
    margin: 0 0 12px;
}
.lang-tab {
    appearance: none;
    border: 1px solid #cbd5e0;
    background: #fff;
    color: #334155;
    font: inherit;
    font-size: 0.85rem;
    line-height: 1;
    padding: 8px 14px;
    border-radius: 999px;
    cursor: pointer;
    text-decoration: none;
}
.lang-tab:hover {
    border-color: #1A365D;
}
.lang-tab.is-active {
    background: #1A365D;
    border-color: #1A365D;
    color: #fff;
    font-weight: 600;
}