:root {
    --color-bg: #f5f6f8;
    --color-surface: #ffffff;
    --color-border: #e1e4e8;
    --color-text: #1f2328;
    --color-text-muted: #57606a;
    --color-primary: #1c5fb0;
    --color-primary-hover: #164a8a;
    --color-danger: #c92a2a;
    --color-danger-hover: #a11f1f;
    --radius: 8px;
    --shadow: 0 1px 2px rgba(31, 35, 40, 0.06), 0 1px 6px rgba(31, 35, 40, 0.04);
}

* {
    box-sizing: border-box;
}

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

a {
    color: var(--color-primary);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.navbar {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 0.75rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--color-text);
}

.navbar-links {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    font-size: 0.9rem;
}

.navbar-user {
    color: var(--color-text-muted);
}

.container {
    max-width: 1100px;
    margin: 2rem auto;
    padding: 0 1.5rem;
}

.page-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
}

.page-header h1 {
    margin: 0;
    font-size: 1.5rem;
}

.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1.25rem 1.5rem;
    margin-bottom: 1rem;
}

.card-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.card-list-item {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1rem 1.25rem;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

.card-list-item .item-main {
    flex: 1;
    min-width: 220px;
}

.card-list-item .item-title {
    font-weight: 600;
    margin: 0 0 0.15rem;
}

.card-list-item .item-meta {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.card-list-item .item-actions {
    display: flex;
    gap: 0.75rem;
    font-size: 0.875rem;
    white-space: nowrap;
}

.empty-state {
    color: var(--color-text-muted);
    padding: 1.5rem;
    text-align: center;
    border: 1px dashed var(--color-border);
    border-radius: var(--radius);
}

.card h2 {
    margin: 0 0 0.6rem;
    font-size: 1.2rem;
    font-weight: 700;
}

.section {
    margin-bottom: 1.75rem;
}

.section-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.6rem;
}

.component-summary {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.component-summary dt {
    display: inline-block;
    min-width: 120px;
    color: var(--color-text);
    font-weight: 500;
}

.component-summary dd {
    display: inline;
    margin: 0;
}

.component-summary .row {
    margin-bottom: 0.2rem;
}

form p {
    margin: 0 0 1rem;
}

.form-options {
    margin-bottom: 1rem;
}

.form-options summary {
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 0.75rem;
}

.form-options[open] summary {
    margin-bottom: 1rem;
}

form label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 0.3rem;
    color: var(--color-text-muted);
}

.affiliation-group {
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 0.75rem 1rem 1rem;
    margin: 0 0 1rem;
}

.affiliation-group legend,
.affiliation-group .field-heading {
    font-weight: 600;
    font-size: 0.9rem;
    padding: 0 0.4rem 0 0;
    margin: 0 0 0.5rem;
}

.affiliation-group ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.affiliation-group li {
    margin-bottom: 0.5rem;
}

.affiliation-group label {
    display: flex !important;
    align-items: center;
    gap: 0.5rem;
    font-weight: 400 !important;
    font-size: 0.9rem;
    color: var(--color-text);
}

.affiliation-group input[type="checkbox"] {
    width: auto;
}

form input[type="text"],
form input[type="number"],
form input[type="date"],
form input[type="url"],
form select,
form textarea {
    width: 100%;
    padding: 0.5rem 0.65rem;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-size: 0.95rem;
    font-family: inherit;
    background: var(--color-surface);
    color: var(--color-text);
}

form input:focus,
form select:focus,
form textarea:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 1px;
}

.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    border: 1px solid transparent;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
}

.btn:hover {
    text-decoration: none;
}

.btn-primary {
    background: var(--color-primary);
    color: #fff;
}

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

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-text);
    border-color: var(--color-border);
}

.btn-secondary:hover {
    background: #eef0f2;
}

.btn-danger {
    background: var(--color-danger);
    color: #fff;
}

.btn-danger:hover {
    background: var(--color-danger-hover);
}

.link-danger {
    color: var(--color-danger);
}

.breadcrumb {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-bottom: 1rem;
}

.badge {
    display: inline-block;
    padding: 0.1rem 0.55rem;
    border-radius: 999px;
    background: #e8f0fb;
    color: var(--color-primary);
    font-size: 0.75rem;
    font-weight: 600;
}

.hero {
    text-align: center;
    padding: 3rem 1.5rem;
}

.hero h1 {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
}

.hero p {
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
}

#dataset-grid {
    margin-top: 0.5rem;
    font-size: 0.9rem;
}

#save-feedback {
    min-height: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--color-text-muted);
    font-size: 0.9rem;
}