* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: #f4f5f7;
    color: #26313a;
    font-family:
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        "Hiragino Kaku Gothic ProN",
        "Hiragino Sans",
        "Yu Gothic",
        Meiryo,
        sans-serif;
}

.site-header {
    background: #f47a20;
    border-bottom: 1px solid #d96516;
}

.site-header-inner {
    max-width: 1080px;
    margin: 0 auto;
    padding: 12px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.site-brand {
    display: inline-flex;
    flex-direction: column;
    color: #ffffff;
    text-decoration: none;
}

.site-brand:focus-visible {
    border-radius: 6px;
    outline: 3px solid rgba(255, 255, 255, 0.8);
    outline-offset: 4px;
}

.site-title {
    font-size: 24px;
    font-weight: 800;
    line-height: 1.2;
    color: #ffffff;
}

.site-subtitle {
    margin-top: 2px;
    font-size: 12px;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.88);
}

.site-nav {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 14px;
    flex-wrap: wrap;
}

.site-nav a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 8px 14px;
    border: 1px solid rgba(255, 255, 255, 0.72);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.12);
    color: #ffffff;
    font-weight: 700;
    text-decoration: none;
}

.site-nav a:hover {
    background: rgba(255, 255, 255, 0.22);
}

.site-nav a:focus-visible {
    outline: 3px solid rgba(255, 255, 255, 0.8);
    outline-offset: 3px;
}

.login-user {
    font-size: 14px;
    color: #ffffff;
}

.logout-form {
    margin: 0;
}

.logout-form button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 8px 14px;
    border: 1px solid rgba(255, 255, 255, 0.72);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.12);
    color: #ffffff;
    font: inherit;
    font-weight: 700;
    cursor: pointer;
}

.logout-form button:hover {
    background: rgba(255, 255, 255, 0.22);
}

.logout-form button:focus-visible {
    outline: 3px solid rgba(255, 255, 255, 0.8);
    outline-offset: 3px;
}

.site-main {
    max-width: 1080px;
    margin: 0 auto;
    padding: 32px 20px;
}

.hero {
    background: #ffffff;
    border-radius: 16px;
    padding: 32px;
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
}

.hero h1 {
    margin-top: 0;
    font-size: 32px;
}

.hero-text {
    line-height: 1.8;
}

.feature-card {
    margin-top: 24px;
    padding: 20px;
    background: #f9fafb;
    border: 1px solid #e5e7eb;
    border-radius: 14px;
}

.learning-record-workbook-group {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid #e5e7eb;
}

.learning-record-workbook-group:first-of-type {
    margin-top: 0;
    padding-top: 0;
    border-top: 0;
}

.information-item {
    margin: 20px 0 0;
}

.information-label {
    margin: 0 0 6px;
    font-weight: 700;
    color: #374151;
}

.information-value {
    margin: 0;
    line-height: 1.6;
}

.rounded-form-fields p {
    margin: 0 0 16px;
}

.rounded-form-fields label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 700;
    color: #374151;
}

.rounded-form-fields input,
.rounded-form-fields select,
.rounded-form-fields textarea {
    width: 100%;
    min-height: 48px;
    padding: 12px 14px;
    border: 1px solid #cbd5e1;
    border-radius: 12px;
    background: #ffffff;
    font: inherit;
}

.rounded-form-fields input:focus,
.rounded-form-fields select:focus,
.rounded-form-fields textarea:focus {
    border-color: #2563eb;
    outline: 3px solid rgba(37, 99, 235, 0.14);
}

.rounded-form-fields input[type="file"] {
    padding: 8px;
}

.rounded-form-fields input[type="file"]::file-selector-button {
    min-height: 40px;
    margin-right: 12px;
    padding: 8px 14px;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    background: #ffffff;
    font: inherit;
    font-weight: 700;
    cursor: pointer;
}

.rounded-form-actions {
    margin-top: 18px;
}

.audio-action-buttons {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.link-button-row {
    margin: 12px 0 0;
}

.rounded-form-actions button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 10px 22px;
    border: 2px solid #f47a20;
    border-radius: 8px;
    background: #f47a20;
    color: #ffffff;
    font: inherit;
    font-weight: 800;
    cursor: pointer;
}

.rounded-form-actions button:hover {
    border-color: #c8560b;
    background: #c8560b;
}

.rounded-form-actions .warning-outline-button {
    border-color: #d69e00;
    background: #fff4b8;
    color: #1f2937;
    box-shadow: 0 2px 6px rgba(31, 41, 55, 0.14);
}

.rounded-form-actions .warning-outline-button:hover {
    border-color: #b77900;
    background: #ffe685;
    color: #111827;
}

.rounded-form-actions .warning-outline-button:focus-visible {
    outline: 3px solid rgba(214, 158, 0, 0.32);
    outline-offset: 3px;
}

.rounded-form-actions .danger-button {
    border-color: #dc2626;
    background: #dc2626;
    color: #ffffff;
    box-shadow: 0 2px 6px rgba(127, 29, 29, 0.2);
}

.rounded-form-actions .danger-button:hover {
    border-color: #b91c1c;
    background: #b91c1c;
    color: #ffffff;
}

.rounded-form-actions .danger-button:focus-visible {
    outline: 3px solid rgba(220, 38, 38, 0.32);
    outline-offset: 3px;
}

.primary-link-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 10px 22px;
    border: 2px solid #f47a20;
    border-radius: 8px;
    background: #f47a20;
    color: #ffffff;
    font-weight: 800;
    text-decoration: none;
}

.primary-link-button:hover {
    border-color: #c8560b;
    background: #c8560b;
}

.primary-link-button:focus-visible {
    outline: 3px solid rgba(244, 122, 32, 0.25);
    outline-offset: 3px;
}

.secondary-link-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 10px 22px;
    border: 2px solid #f47a20;
    border-radius: 8px;
    background: #ffffff;
    color: #c8560b;
    font-weight: 800;
    text-decoration: none;
}

.secondary-link-button:hover {
    background: #fff7ed;
    color: #a84708;
}

.secondary-link-button:focus-visible {
    outline: 3px solid rgba(244, 122, 32, 0.25);
    outline-offset: 3px;
}

.answer-key-source-list {
    display: grid;
    gap: 20px;
    margin-top: 24px;
}

.answer-key-source-card {
    margin-top: 0;
}

.answer-key-source-card .rounded-form-actions > form {
    margin-top: 12px;
}

.answer-key-source-card h2 {
    margin: 0 0 18px;
    font-size: 22px;
    overflow-wrap: anywhere;
}

.answer-key-review-source-image-wrap {
    margin-top: 16px;
    overflow: hidden;
    border-radius: 12px;
}

.answer-key-review-source-image {
    display: block;
    width: 100%;
    height: auto;
    max-height: 720px;
    object-fit: contain;
}

.answer-key-source-details {
    margin: 0;
}

.answer-key-source-details > div {
    display: grid;
    grid-template-columns: minmax(120px, 180px) minmax(0, 1fr);
    gap: 16px;
    padding: 12px 0;
    border-top: 1px solid #e5e7eb;
}

.answer-key-source-details dt {
    font-weight: 700;
    color: #4b5563;
}

.answer-key-source-details dd {
    min-width: 0;
    margin: 0;
    overflow-wrap: anywhere;
}

.errorlist {
    margin: 0 0 16px;
    padding: 12px 16px 12px 34px;
    border: 1px solid #fecaca;
    border-radius: 10px;
    background: #fef2f2;
    color: #b91c1c;
}

@media (max-width: 640px) {
    .site-header-inner {
        align-items: flex-start;
        flex-direction: column;
    }

    .site-nav {
        justify-content: flex-start;
    }

    .site-main {
        padding: 20px 12px;
    }

    .hero {
        padding: 22px 16px;
    }

    .hero h1 {
        font-size: 26px;
    }

    .rounded-form-actions button {
        width: 100%;
    }

    .primary-link-button,
    .secondary-link-button {
        width: 100%;
    }

    .answer-key-source-details > div {
        grid-template-columns: 1fr;
        gap: 6px;
    }
}