/* Exam page specific styles */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Hiragino Kaku Gothic ProN', '游ゴシック Medium', Meiryo, sans-serif;
    background-color: #f4f6f8;
    color: #333;
    margin: 0;
}

a {
    color: inherit;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    min-height: 100vh;
    background-color: #fff;
    display: flex;
    flex-direction: column;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.05);
}

.header {
    height: 65px;
    background-color: #f8f9fa;
    display: flex;
    align-items: center;
    padding: 0 20px;
    border-bottom: 1px solid #e0e0e0;
}

.logo-container {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo-container:focus,
.logo-container:hover {
    text-decoration: none;
}

.logo {
    width: 35px;
    height: 35px;
    background-image: url('../images/v1_5.png');
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover;
    margin-right: 10px;
}

.site-title {
    /* color: #2f98a5; */
    color: #0064b4;
    font-weight: bold;
    font-size: 1.25rem;
    text-decoration: none;
}

.main-content {
    flex: 1;
    padding: 20px;
}

.footer {
    background-color: #f8f9fa;
    padding: 1.5rem 20px;
    border-top: 1px solid #e0e0e0;
}

.footer-nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem 1.5rem;
}

.footer-nav a {
    color: #555;
    font-size: 0.8125rem;
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-nav a:hover {
    color: #2f98a5;
    text-decoration: underline;
}

@media (max-width: 600px) {
    .header {
        padding: 0 16px;
    }

    .main-content {
        padding: 15px;
    }

    .container {
        min-height: 100vh;
    }
}

@media (max-width: 480px) {
    .header {
        height: 60px;
        padding: 0 15px;
    }

    .logo {
        width: 30px;
        height: 30px;
    }

    .site-title {
        font-size: 1.125rem;
    }
}

/* Exam interaction styles */
.exam-page {
    background-color: #fff;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.exam-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    font-weight: 600;
}

.exam-header .subject {
    font-size: 1rem;
    color: #555;
}

.exam-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    gap: 1rem;
}

.answer-time {
    display: flex;
    flex-direction: column;
    font-size: 0.8rem;
    color: #444;
}

.answer-time .label {
    margin-bottom: 0.25rem;
}

.progress-bars {
    display: flex;
    gap: 4px;
}

.progress-bars .bar {
    width: 16px;
    height: 6px;
    border-radius: 2px;
    background-color: #f5cfd6;
}

.progress-bars .bar.done {
    background-color: #00a7e1;
}

.progress-bars .bar.current {
    background-color: #ffb74d;
}

.timer-circle {
    width: 80px;
    height: 80px;
    position: relative;
}

.timer-svg {
    width: 80px;
    height: 80px;
    transform: rotate(-90deg);
}

.timer-bg {
    fill: none;
    stroke: #f0f0f0;
    stroke-width: 6;
}

.timer-progress {
    fill: none;
    stroke: #00a7e1;
    stroke-width: 6;
    stroke-linecap: round;
    transition: stroke-dashoffset 1s linear;
}

.timer-text {
    fill: #000;
    font-size: 0.9rem;
    transform: rotate(90deg);
    transform-box: fill-box;
    transform-origin: center;
}

.instruction {
    background-color: #f7f7f7;
    border-radius: 4px;
    padding: 0.75rem 1rem;
    margin-bottom: 1rem;
    font-size: 0.9rem;
    color: #555;
}

.question-block {
    margin-bottom: 1rem;
}

.question-title {
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.question-text {
    margin-bottom: 1rem;
    line-height: 1.5;
}

.options-list {
    border: 1px solid #ddd;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 1rem;
}

.option-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 0.8rem;
    font-size: 0.95rem;
    border-bottom: 1px solid #eee;
    cursor: pointer;
}

.option-item:last-child {
    border-bottom: none;
}

.option-item input[type="radio"] {
    accent-color: #00a7e1;
    margin-right: 0.25rem;
}

.option-item:hover {
    background-color: #f7fbfd;
}

.option-item.selected {
    background-color: #e6f4f7;
    border-left: 4px solid #00a7e1;
}

.next-button {
    width: 100%;
    padding: 0.8rem;
    font-size: 1rem;
    margin-top: 1rem;
    border-radius: 25px;
    text-align: center;
    border: none;
    cursor: pointer;
    transition: opacity 0.2s ease, background-color 0.2s ease;
}

.next-button:disabled {
    background-color: #e0e0e0;
    color: #aaa;
    cursor: not-allowed;
}

.next-button:not(:disabled) {
    background-color: #00a7e1;
    color: #fff;
}

.close-btn {
    text-decoration: none;
    font-size: 1.25rem;
    color: #999;
    line-height: 1;
}

.close-btn:hover {
    color: #333;
}

.exam-page.state-unanswered .next-button {
    background-color: #e9edf1;
    color: #b6b6b6;
}

.exam-page.state-answered .next-button {
    background-color: #00a7e1;
    color: #fff;
}

.exam-page.last-question.state-answered .next-button {
    background-color: #0096d6;
}

.exam-page.state-submitting .next-button {
    opacity: 0.9;
    position: relative;
    pointer-events: none;
}

.exam-page.state-submitting .next-button::after {
    content: "";
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.9);
    border-top-color: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    display: inline-block;
    vertical-align: middle;
    margin-left: 0.5rem;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.status-message {
    margin-top: 1rem;
    font-size: 0.9rem;
    color: #e53935;
}

.timer-circle[data-hidden="true"] {
    display: none;
}

.hidden {
    display: none !important;
}

@media (max-width: 640px) {
    .exam-page {
        padding: 1.25rem;
    }

    .exam-meta {
        flex-direction: column;
        align-items: flex-start;
    }

    .timer-circle {
        align-self: flex-end;
    }
}