:root {
    --color-page: #f7f9fb;
    --color-surface: #ffffff;
    --color-text: #1f2933;
    --color-muted: #5f6b7a;
    --color-primary: #0f766e;
    --color-border: #d8e0e8;
    --space-page: 1rem;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--color-page);
    color: var(--color-text);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.5;
}

a {
    color: var(--color-primary);
}

.site-header,
.site-footer {
    background: var(--color-surface);
    border-color: var(--color-border);
    padding: 1rem var(--space-page);
}

.site-header {
    border-bottom: 1px solid var(--color-border);
}

.site-header__inner,
.site-footer {
    display: grid;
    gap: 0.5rem;
}

.site-brand {
    color: var(--color-text);
    font-size: 1.25rem;
    font-weight: 700;
    text-decoration: none;
}

.site-version,
.site-nav,
.site-footer {
    color: var(--color-muted);
    font-size: 0.9rem;
}

.site-nav {
    margin-top: 0.75rem;
}

.site-main {
    margin: 0 auto;
    max-width: 64rem;
    padding: 2rem var(--space-page);
}

.page-section {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 1.25rem;
}

.page-section h1 {
    margin: 0 0 0.75rem;
    font-size: 1.75rem;
    line-height: 1.2;
}

.page-section p {
    margin: 0;
    color: var(--color-muted);
}

.page-section p + p,
.form {
    margin-top: 1rem;
}

.form {
    display: grid;
    gap: 0.75rem;
}

.form label {
    font-weight: 600;
}

.form input,
.form select,
.form textarea,
.search-form input {
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font: inherit;
    padding: 0.75rem;
    width: 100%;
}

.form-actions {
    align-items: center;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.form button {
    background: var(--color-primary);
    border: 0;
    border-radius: 6px;
    color: #ffffff;
    cursor: pointer;
    font: inherit;
    font-weight: 700;
    padding: 0.8rem 1rem;
}

.form fieldset {
    border: 1px solid var(--color-border);
    border-radius: 8px;
    display: grid;
    gap: 0.75rem;
    margin: 0;
    padding: 1rem;
}

.form legend {
    font-weight: 700;
    padding: 0 0.35rem;
}

.field-help {
    color: var(--color-muted);
    font-size: 0.95rem;
    margin: 0;
}

.message {
    border-radius: 6px;
    padding: 0.75rem;
}

.message--error {
    background: #fee2e2;
    color: #991b1b;
}

.message--info {
    background: #e0f2fe;
    color: #075985;
}

.site-footer {
    border-top: 1px solid var(--color-border);
}

.admin-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.admin-nav a,
.action-button {
    border: 1px solid var(--color-border);
    border-radius: 6px;
    color: var(--color-text);
    display: inline-block;
    font-weight: 600;
    padding: 0.65rem 0.8rem;
    text-decoration: none;
    white-space: nowrap;
}

.admin-nav a[aria-current="page"],
.action-button {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #ffffff;
}

.tab-nav {
    display: flex;
    gap: 0.5rem;
    overflow-x: auto;
    padding-bottom: 0.25rem;
}

.tab-nav a {
    border: 1px solid var(--color-border);
    border-radius: 6px;
    color: var(--color-text);
    display: inline-block;
    font-weight: 600;
    padding: 0.65rem 0.8rem;
    text-decoration: none;
    white-space: nowrap;
}

.tab-nav a[aria-current="page"] {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #ffffff;
}

button.action-button {
    cursor: pointer;
    font: inherit;
}

button:disabled {
    cursor: not-allowed;
    opacity: 0.6;
}

.dashboard-hero,
.dashboard-section {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    margin-bottom: 1rem;
    padding: 1.25rem;
}

.dashboard-hero {
    display: grid;
    gap: 1rem;
}

.dashboard-hero h1,
.dashboard-section h2 {
    margin: 0 0 0.75rem;
}

.dashboard-hero p {
    color: var(--color-muted);
    margin: 0;
}

.meta-list,
.stat-grid {
    margin: 0;
}

.meta-list {
    display: grid;
    gap: 0.75rem;
}

.meta-list dt,
.stat-card dt {
    color: var(--color-muted);
    font-size: 0.9rem;
}

.meta-list dd,
.stat-card dd {
    font-weight: 700;
    margin: 0.15rem 0 0;
}

.workflow-grid,
.stat-grid,
.action-grid {
    display: grid;
    gap: 0.75rem;
}

.workflow-card,
.stat-card {
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 1rem;
}

.workflow-card h3 {
    font-size: 1rem;
    margin: 0 0 0.75rem;
}

.status-pill {
    background: #eef2f7;
    border-radius: 999px;
    color: var(--color-muted);
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 700;
    padding: 0.25rem 0.6rem;
}

.section-heading {
    display: grid;
    gap: 1rem;
    margin-bottom: 1rem;
}

.section-heading h1,
.section-heading p {
    margin: 0;
}

.section-heading p {
    color: var(--color-muted);
}

.table-wrap {
    overflow-x: auto;
}

table {
    border-collapse: collapse;
    min-width: 44rem;
    width: 100%;
}

th,
td {
    border-bottom: 1px solid var(--color-border);
    padding: 0.75rem;
    text-align: left;
    vertical-align: top;
}

th {
    color: var(--color-muted);
    font-size: 0.9rem;
}

.row-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.row-actions form {
    margin: 0;
}

.row-actions button {
    font: inherit;
}

.search-form {
    align-items: end;
    display: grid;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.search-form label {
    font-weight: 600;
}

.search-form button {
    font: inherit;
    padding: 0.75rem 1rem;
}

.filter-form,
.bulk-actions {
    display: grid;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.filter-form input,
.filter-form select,
.bulk-actions select {
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font: inherit;
    padding: 0.75rem;
    width: 100%;
}

.filter-form button,
.bulk-actions button {
    font: inherit;
    padding: 0.75rem 1rem;
}

.checkbox-label {
    align-items: center;
    display: flex;
    gap: 0.5rem;
}

.checkbox-label input {
    width: auto;
}

.portal-hero {
    display: grid;
    gap: 0.75rem;
}

.book-group,
.review-books {
    display: grid;
    gap: 0.75rem;
}

.book-option {
    border: 1px solid var(--color-border);
    border-radius: 8px;
    display: grid;
    gap: 0.75rem;
    padding: 1rem;
}

.book-option h2 {
    font-size: 1rem;
    margin: 0 0 0.35rem;
}

.book-option p {
    color: var(--color-muted);
    margin: 0.15rem 0 0;
}

.book-option__choices {
    display: grid;
    gap: 0.5rem;
}

.review-list {
    margin: 1rem 0;
}

.publisher-summary {
    border-top: 1px solid var(--color-border);
    margin-top: 1.25rem;
    padding-top: 1rem;
}

.publisher-summary h2,
.publisher-summary p {
    margin: 0 0 0.75rem;
}

.detail-list {
    display: grid;
    gap: 0.75rem;
    margin: 0;
}

.detail-list dt {
    color: var(--color-muted);
    font-size: 0.9rem;
}

.detail-list dd {
    margin: 0.15rem 0 0;
}

@media (min-width: 48rem) {
    :root {
        --space-page: 2rem;
    }

    .site-header__inner,
    .site-footer {
        align-items: center;
        grid-template-columns: 1fr auto;
    }

    .dashboard-hero {
        grid-template-columns: 1fr auto;
    }

    .workflow-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .stat-grid,
    .action-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .section-heading {
        align-items: center;
        grid-template-columns: 1fr auto;
    }

    .search-form {
        grid-template-columns: auto minmax(14rem, 1fr) auto;
    }

    .filter-form {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    .filter-form input {
        grid-column: span 2;
    }

    .bulk-actions {
        align-items: center;
        grid-template-columns: minmax(12rem, 1fr) minmax(12rem, 1fr) auto;
    }

    .book-option {
        align-items: start;
        grid-template-columns: 1fr auto;
    }
}

@media (max-width: 34rem) {
    .admin-nav {
        flex-wrap: nowrap;
        margin-left: calc(var(--space-page) * -1);
        margin-right: calc(var(--space-page) * -1);
        overflow-x: auto;
        padding: 0 var(--space-page) 0.35rem;
        scrollbar-width: thin;
    }
}