/* ============================================================
   IMPACT — Styles
   ============================================================ */

:root {
    --primary: #1a5276;
    --primary-light: #2e86c1;
    --primary-dark: #0e2f44;
    --accent: #27ae60;
    --accent-light: #2ecc71;
    --bg: #f8f9fa;
    --surface: #ffffff;
    --text: #2c3e50;
    --text-light: #7f8c8d;
    --border: #e0e0e0;
    --danger: #e74c3c;
    --warning: #f39c12;
    --radius: 8px;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.12);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text);
    background-color: var(--bg);
}

/* ---- Header ---- */

header {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    color: white;
    text-align: center;
    padding: 2.5rem 1rem 0;
}

.header-content {
    max-width: 800px;
    margin: 0 auto;
}

header h1 {
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: 4px;
    margin-bottom: 0.25rem;
}

.subtitle {
    font-size: 1rem;
    opacity: 0.85;
    font-weight: 300;
}

.tagline {
    font-size: 0.9rem;
    opacity: 0.65;
    margin-top: 0.25rem;
}

nav {
    display: flex;
    justify-content: center;
    gap: 0;
    margin-top: 1.5rem;
}

.nav-link {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
    border-bottom: 3px solid transparent;
    transition: all 0.2s;
}

.nav-link:hover {
    color: white;
    background: rgba(255, 255, 255, 0.1);
}

.nav-link.active {
    color: white;
    border-bottom-color: var(--accent);
}

/* ---- Main ---- */

main {
    max-width: 1100px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.section {
    display: none;
}

.section.active {
    display: block;
}

h2 {
    color: var(--primary);
    font-size: 1.6rem;
    margin-bottom: 0.25rem;
}

.section-desc {
    color: var(--text-light);
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

/* ---- Search ---- */

.search-bar {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.search-bar input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    font-size: 1rem;
    transition: border-color 0.2s;
}

.search-bar input:focus {
    outline: none;
    border-color: var(--primary-light);
}

.search-bar button {
    padding: 0.75rem 1.5rem;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: var(--radius);
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.2s;
}

.search-bar button:hover {
    background: var(--primary-light);
}

/* ---- Journal List ---- */

.journal-list {
    max-height: 60vh;
    overflow-y: auto;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    margin-bottom: 2rem;
}

.journal-list-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.journal-list-table thead {
    position: sticky;
    top: 0;
    background: var(--primary);
    color: white;
    z-index: 1;
}

.journal-list-table th {
    padding: 0.6rem 0.75rem;
    text-align: left;
    font-weight: 600;
    font-size: 0.85rem;
}

.journal-list-row {
    cursor: pointer;
    transition: background 0.1s;
}

.journal-list-row:hover {
    background: #f0f6fc;
}

.journal-list-row td {
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid var(--border);
}

.jl-name {
    color: var(--primary);
    font-weight: 500;
}

.jl-rate, .jl-papers {
    text-align: right;
    white-space: nowrap;
    color: var(--text);
}

/* ---- Detail Panel ---- */

.detail-panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.back-btn {
    background: none;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.5rem 1rem;
    cursor: pointer;
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    transition: color 0.2s;
}

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

.detail-panel h3 {
    font-size: 1.4rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

/* ---- Metrics Row ---- */

.metrics-row {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.metric-card {
    flex: 1;
    min-width: 100px;
    background: var(--bg);
    border-radius: var(--radius);
    padding: 1rem;
    text-align: center;
}

.metric-value {
    display: block;
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--primary-dark);
}

.metric-label {
    font-size: 0.8rem;
    color: var(--text-light);
    margin-top: 0.25rem;
}

.metric-sublabel {
    font-size: 0.7rem;
    color: var(--text-light);
    opacity: 0.75;
}

.compare-metrics-journal {
    margin-bottom: 1rem;
}

.compare-metrics-journal .metrics-row {
    margin-bottom: 0.5rem;
}

.compare-metrics-header {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--primary);
    margin-bottom: 0.4rem;
}

.metric-info {
    cursor: help;
    color: var(--primary-light);
    font-size: 0.85em;
}

/* ---- Charts ---- */

.chart-container {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem;
    margin-bottom: 1.5rem;
}

canvas {
    max-width: 100%;
}

/* ---- Chart Controls ---- */

.chart-controls {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
}

.chart-controls-label {
    font-size: 0.85rem;
    color: var(--text-light);
    font-weight: 600;
}

.toggle-group {
    display: flex;
    gap: 0;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.toggle-btn {
    padding: 0.4rem 0.9rem;
    font-size: 0.82rem;
    border: none;
    background: var(--surface);
    color: var(--text-light);
    cursor: pointer;
    transition: all 0.15s;
    border-right: 1px solid var(--border);
    white-space: nowrap;
}

.toggle-btn:last-child {
    border-right: none;
}

.toggle-btn:hover {
    background: #f0f6fc;
    color: var(--text);
}

.toggle-btn.active {
    background: var(--primary);
    color: white;
}

/* ---- Author Utilities ---- */

.loading-text {
    color: var(--text-light);
    font-style: italic;
    padding: 0.75rem 0;
}

.error-text {
    color: var(--danger);
    padding: 0.75rem 0;
}

.data-note {
    font-size: 0.8rem;
    color: var(--text-light);
    margin-top: 0.75rem;
    line-height: 1.5;
}

/* ---- Author Info ---- */

.author-info-box {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.author-info-box p {
    margin-bottom: 0.5rem;
}

.author-info-box pre {
    background: var(--primary-dark);
    color: #e0e0e0;
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    font-size: 0.82rem;
    overflow-x: auto;
    margin: 0.5rem 0;
}

/* ---- Compare Section ---- */

.checkbox-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.checkbox-grid label {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 1rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 0.9rem;
    transition: border-color 0.2s;
}

.checkbox-grid label:has(input:checked) {
    border-color: var(--primary);
    background: #eaf2f8;
}

.checkbox-grid input[type="checkbox"] {
    accent-color: var(--primary);
}

/* ---- Journal Trends Comparison Panel ---- */

.jc-selector-row {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    align-items: flex-start;
}

.jc-selector-group {
    flex: 1;
    min-width: 200px;
}

.jc-selector-label {
    font-size: 0.85rem;
    color: var(--text-light);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.color-dot {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
    vertical-align: middle;
    margin: 0 3px 1px 3px;
}

.section-divider {
    border: none;
    border-top: 1px solid var(--border);
    margin: 1.5rem 0;
}

/* ---- Journal Picker ---- */

.journal-picker {
    position: relative;
    margin-bottom: 0.5rem;
}

.picker-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-bottom: 0.5rem;
}

.picker-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.3rem 0.4rem 0.3rem 0.65rem;
    background: #eaf2f8;
    border: 1px solid var(--primary-light);
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--primary-dark);
}

.picker-chip-remove {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.1rem;
    line-height: 1;
    color: var(--text-light);
    padding: 0 0.15rem;
    margin-left: 0.1rem;
    transition: color 0.15s;
}

.picker-chip-remove:hover {
    color: var(--danger);
}

.picker-input-wrap {
    position: relative;
}

.picker-input {
    width: 100%;
    padding: 0.55rem 1rem;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.9rem;
    transition: border-color 0.2s;
}

.picker-input:focus {
    outline: none;
    border-color: var(--primary-light);
}

.picker-dropdown {
    position: absolute;
    top: calc(100% + 2px);
    left: 0;
    right: 0;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-hover);
    z-index: 200;
    display: none;
    max-height: 280px;
    overflow-y: auto;
}

.picker-option {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.55rem 1rem;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background 0.1s;
}

.picker-option:hover {
    background: #f0f6fc;
}

/* ---- About ---- */

.about-content {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow);
}

.about-content h3 {
    color: var(--primary);
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
}

.about-content h3:first-child {
    margin-top: 0;
}

.about-content p {
    margin-bottom: 0.75rem;
}

.about-content a {
    color: var(--primary-light);
}

.formula-box {
    background: var(--bg);
    border-left: 4px solid var(--accent);
    padding: 1rem 1.25rem;
    margin: 1rem 0;
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
    color: var(--primary-dark);
    border-radius: 0 var(--radius) var(--radius) 0;
}

/* ---- Table ---- */

.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
    font-size: 0.9rem;
}

.data-table thead {
    background: var(--primary);
    color: white;
}

.data-table th {
    padding: 0.75rem;
    text-align: left;
    font-weight: 600;
}

.data-table td {
    padding: 0.6rem 0.75rem;
    border-bottom: 1px solid var(--border);
}

.data-table tbody tr:hover {
    background: #f0f6fc;
}

/* ---- Footer ---- */

footer {
    background: var(--primary-dark);
    color: rgba(255, 255, 255, 0.75);
    text-align: center;
    padding: 1.5rem;
    margin-top: 3rem;
    font-size: 0.9rem;
}

footer a {
    color: var(--accent-light);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

/* ---- Section label ---- */

.section-label {
    font-size: 0.85rem;
    color: var(--text-light);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

/* ---- Single Journal Picker ---- */

.single-journal-picker {
    margin-bottom: 1.25rem;
}

.single-journal-picker .picker-input-wrap {
    max-width: 480px;
}

.single-picker-clear {
    position: absolute;
    right: 0.6rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-light);
    font-size: 1.1rem;
    cursor: pointer;
    padding: 0 0.25rem;
    line-height: 1;
}

.single-picker-clear:hover {
    color: var(--text);
}

.picker-option-selected {
    background: #e8f4fd;
    font-weight: 600;
}

/* ---- Papers toolbar ---- */

.papers-toolbar {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
    padding: 0.75rem 1rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.papers-search-input {
    flex: 1;
    min-width: 200px;
    padding: 0.45rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.9rem;
    transition: border-color 0.2s;
}

.papers-search-input:focus {
    outline: none;
    border-color: var(--primary-light);
}

.papers-filter-group {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.papers-filter-label {
    font-size: 0.82rem;
    color: var(--text-light);
    font-weight: 600;
    white-space: nowrap;
}

.papers-select {
    padding: 0.4rem 0.65rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.85rem;
    color: var(--text);
    background: var(--surface);
    cursor: pointer;
}

.papers-count-label {
    font-size: 0.82rem;
    color: var(--text-light);
    white-space: nowrap;
}

/* ---- Papers table scroll & sortable ---- */

.table-scroll {
    overflow-x: auto;
    margin-bottom: 0.5rem;
}

.sortable-table th.sortable {
    cursor: pointer;
    user-select: none;
    white-space: nowrap;
}

.sortable-table th.sortable:hover {
    background: rgba(255, 255, 255, 0.15);
}

.sortable-table th.sortable::after {
    content: ' ↕';
    opacity: 0.35;
    font-size: 0.8em;
}

.sortable-table th.sort-active::after {
    opacity: 1;
}

.sortable-table th.sort-asc::after {
    content: ' ↑';
}

.sortable-table th.sort-desc::after {
    content: ' ↓';
}

.papers-row-link {
    cursor: pointer;
}

.papers-row-link:hover td {
    background: #e8f4fd;
}

/* ---- Authors tab buttons ---- */

.authors-tabs {
    display: flex;
    border-bottom: 2px solid var(--border);
    margin-bottom: 1.5rem;
}

.authors-tab-btn {
    padding: 0.6rem 1.5rem;
    border: none;
    background: none;
    color: var(--text-light);
    font-size: 0.95rem;
    cursor: pointer;
    border-bottom: 3px solid transparent;
    margin-bottom: -2px;
    transition: color 0.15s;
}

.authors-tab-btn:hover {
    color: var(--text);
}

.authors-tab-btn.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    font-weight: 600;
}


/* ---- Authors breakdown charts ---- */

.authors-charts-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-bottom: 1rem;
}

.authors-chart-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem;
    box-shadow: var(--shadow);
}

.authors-chart-card h4 {
    color: var(--primary);
    font-size: 0.95rem;
    margin-bottom: 0.75rem;
}

.authors-chart-card .chart-container {
    height: 360px;
}

/* ---- Geography placeholder ---- */

.geo-placeholder {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 3rem 2rem;
    text-align: center;
    box-shadow: var(--shadow);
    max-width: 620px;
    margin: 2rem auto;
}

.geo-placeholder-icon {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    display: block;
}

.geo-placeholder h3 {
    color: var(--primary);
    font-size: 1.4rem;
    margin-bottom: 0.75rem;
}

.geo-placeholder p {
    color: var(--text-light);
    margin-bottom: 1rem;
}

.geo-feature-list {
    text-align: left;
    max-width: 440px;
    margin: 0 auto 1rem;
    padding-left: 1.5rem;
    color: var(--text);
    line-height: 1.9;
}

/* ---- Responsive ---- */

@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

    nav {
        flex-wrap: wrap;
    }

    .nav-link {
        padding: 0.5rem 1rem;
        font-size: 0.85rem;
    }

    .metrics-row {
        flex-direction: column;
    }

    .journal-list {
        max-height: 50vh;
    }

    .authors-charts-grid {
        grid-template-columns: 1fr;
    }

    .single-journal-picker .picker-input-wrap {
        max-width: 100%;
    }
}

/* ---- Download bar ---- */

.download-bar {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.75rem;
    flex-wrap: wrap;
}

.download-label {
    font-size: 0.85rem;
    color: #666;
    font-weight: 500;
}

.download-btn {
    padding: 0.3rem 0.75rem;
    font-size: 0.82rem;
    border: 1px solid #c8d6e5;
    border-radius: 4px;
    background: #f0f4f8;
    color: #2e4a6d;
    cursor: pointer;
    font-weight: 500;
    transition: background 0.15s, border-color 0.15s;
}

.download-btn:hover {
    background: #dce8f3;
    border-color: #2e86c1;
}

/* ---- Author search modes ---- */

.author-search-modes {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
}

.author-mode-block {
    flex: 1;
    min-width: 260px;
}

.author-mode-label {
    display: block;
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
    color: #1a2e44;
}

.author-mode-hint {
    font-size: 0.8rem;
    color: #666;
    margin: 0 0 0.6rem;
}

.author-mode-divider {
    align-self: center;
    font-size: 0.85rem;
    color: #999;
    font-style: italic;
    padding-top: 2rem;
}

.cb-cell {
    width: 2rem;
    text-align: center;
    cursor: default;
}

.cb-cell input[type=checkbox] {
    cursor: pointer;
    width: 15px;
    height: 15px;
}

.sort-header {
    cursor: pointer;
    user-select: none;
    white-space: nowrap;
}

.sort-header:hover {
    background: #dce8f3;
}

tr.row-excluded td {
    opacity: 0.4;
    text-decoration: line-through;
    color: #999;
}

/* ---- Author Profile ---- */
.author-profile-row {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 0.75rem;
}

.profile-save-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.profile-share-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.profile-label {
    font-size: 0.82rem;
    color: #666;
    white-space: nowrap;
}

.profile-name-input {
    padding: 0.35rem 0.6rem;
    font-size: 0.82rem;
    border: 1px solid #c8d6e5;
    border-radius: 6px;
    background: #fff;
    color: #1a2e44;
    width: 180px;
    outline: none;
}

.profile-name-input:focus { border-color: #3498db; }

.save-profile-btn {
    display: inline-flex;
    align-items: center;
    padding: 0.4rem 0.9rem;
    background: #27ae60;
    border: none;
    border-radius: 6px;
    font-size: 0.82rem;
    color: #fff;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.15s;
    white-space: nowrap;
}

.save-profile-btn:hover { opacity: 0.85; }

.share-profile-btn {
    display: inline-flex;
    align-items: center;
    padding: 0.4rem 0.9rem;
    background: #f0f4f8;
    border: 1px solid #c8d6e5;
    border-radius: 6px;
    font-size: 0.82rem;
    color: #1a2e44;
    cursor: pointer;
    transition: background 0.15s;
    white-space: nowrap;
}

.share-profile-btn:hover { background: #dce8f3; }

.share-confirm {
    font-size: 0.82rem;
    color: #27ae60;
    font-weight: 500;
}

.profile-status {
    font-size: 0.8rem;
    width: 100%;
    padding: 0.4rem 0.75rem;
    border-radius: 6px;
    background: #f0f4f8;
    border: 1px solid #c8d6e5;
}

.profile-status-ok { color: #27ae60; border-color: #27ae60; background: #f0fff5; }
.profile-status-error { color: #e74c3c; border-color: #e74c3c; background: #fff5f5; }

.profile-tip {
    font-size: 0.78rem;
    color: #888;
    font-style: italic;
    margin: -0.25rem 0 0.75rem;
}

/* ---- Network controls ---- */

.network-selected-panel {
    background: #f0f4f8;
    border: 1px solid #c8d6e5;
    border-radius: 8px;
    padding: 1rem 1.25rem;
    margin-top: 0.75rem;
}

.network-selected-panel h4 {
    margin: 0 0 0.4rem;
    font-size: 1rem;
    color: #1a3a52;
    line-height: 1.4;
}

.network-selected-panel p {
    margin: 0 0 0.5rem;
    color: #555;
    font-size: 0.88rem;
}

.pubmed-link {
    color: #2e86c1;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
}

.pubmed-link:hover {
    text-decoration: underline;
}

/* ---- Influence Section ---- */

.influence-ctrl-row {
    display: flex;
    gap: 1.5rem;
    align-items: flex-end;
    flex-wrap: wrap;
    margin-bottom: 1.25rem;
}

.influence-picker-wrap {
    flex: 2;
    min-width: 280px;
}

.influence-pmid-wrap {
    flex: 1;
    min-width: 240px;
}

.influence-label {
    display: block;
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
    color: #1a2e44;
}

.influence-toggle-row {
    margin: 0.75rem 0;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.influence-toggle-label {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    cursor: pointer;
    color: var(--text);
}

.inf-paper-row {
    padding: 0.25rem 0;
}

.inf-paper-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: #1a3a52;
    margin-bottom: 0.2rem;
    line-height: 1.4;
}

.inf-paper-meta {
    font-size: 0.83rem;
    color: #555;
}

.inf-paper-divider {
    border: none;
    border-top: 1px solid #d0dce8;
    margin: 0.6rem 0;
}

.inf-not-in-journal {
    display: inline-block;
    margin-left: 0.5rem;
    padding: 0.1rem 0.4rem;
    font-size: 0.72rem;
    font-weight: 600;
    border-radius: 3px;
    background: #fef3cd;
    color: #856404;
    border: 1px solid #ffd666;
    vertical-align: middle;
}

/* ---- Card header row (title + inline download buttons) ---- */

.card-header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
}

.card-header-row h4 {
    margin-bottom: 0;
    color: var(--primary);
    font-size: 0.95rem;
}

.card-dl-bar {
    display: flex;
    gap: 0.3rem;
    align-items: center;
    flex-shrink: 0;
}

.dl-btn-sm {
    padding: 0.18rem 0.48rem;
    font-size: 0.72rem;
    border: 1px solid #c8d6e5;
    border-radius: 3px;
    background: #f0f4f8;
    color: #2e4a6d;
    cursor: pointer;
    font-weight: 500;
    transition: background 0.15s, border-color 0.15s;
}

.dl-btn-sm:hover {
    background: #dce8f3;
    border-color: #2e86c1;
}

/* ---- Custom CSS tooltip for h-index info icon ---- */

.metric-info {
    position: relative;
    cursor: help;
    color: var(--primary-light);
    font-size: 0.85em;
    display: inline-block;
}

.metric-info::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    background: #1a2e44;
    color: white;
    font-size: 0.75rem;
    font-weight: 400;
    padding: 0.5rem 0.7rem;
    border-radius: 5px;
    width: 260px;
    white-space: normal;
    text-align: left;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s;
    z-index: 500;
    line-height: 1.45;
}

.metric-info:hover::after {
    opacity: 1;
}

/* ---- Article type filter pills ---- */

.type-filter-pills {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    flex-wrap: wrap;
    margin-bottom: 0.75rem;
}

.filter-label {
    font-size: 0.82rem;
    color: #666;
    font-weight: 500;
}

.type-pill {
    padding: 0.2rem 0.65rem;
    font-size: 0.78rem;
    border: 1px solid #c8d6e5;
    border-radius: 12px;
    background: #f0f4f8;
    color: #2e4a6d;
    cursor: pointer;
    font-weight: 500;
    transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.type-pill.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.type-pill:hover:not(.active) {
    background: #dce8f3;
    border-color: #2e86c1;
}

/* ---- Influence view mode toggle ---- */

.influence-view-row {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin: 0.5rem 0 0.75rem;
    font-size: 0.88rem;
    color: var(--text);
    flex-wrap: wrap;
}

.influence-view-row label {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    cursor: pointer;
}

/* ---- Paste PMIDs textarea ---- */

.paste-pmid-area {
    width: 100%;
    font-family: monospace;
    font-size: 0.8rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.4rem 0.5rem;
    resize: vertical;
    color: var(--text);
    background: white;
    box-sizing: border-box;
    margin-bottom: 0.4rem;
}

.paste-pmid-area:focus {
    outline: none;
    border-color: var(--primary);
}

/* ---- Chart range controls (zoom) ---- */

.chart-range-controls {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.6rem 1.2rem;
    margin: 0.5rem 0 0.75rem;
    padding: 0.55rem 0.85rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.83rem;
    color: var(--text);
}

.range-control-group {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    flex-wrap: nowrap;
}

.range-label {
    font-weight: 500;
    color: #555;
    white-space: nowrap;
}

.range-separator {
    color: #888;
    padding: 0 0.1rem;
}

.range-select {
    max-width: 120px;
    padding: 0.2rem 0.4rem;
    font-size: 0.8rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: white;
    color: var(--text);
    cursor: pointer;
}

.range-select:focus {
    outline: none;
    border-color: var(--primary);
}

.range-input {
    width: 72px;
    padding: 0.2rem 0.35rem;
    font-size: 0.8rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    text-align: center;
    color: var(--text);
    background: white;
}

.range-input:focus {
    outline: none;
    border-color: var(--primary);
}

.range-reset-btn {
    padding: 0.2rem 0.6rem;
    font-size: 0.78rem;
    border: 1px solid #c8d6e5;
    border-radius: 4px;
    background: #f0f4f8;
    color: #2e4a6d;
    cursor: pointer;
    font-weight: 500;
    transition: background 0.15s, border-color 0.15s;
    white-space: nowrap;
}

.range-reset-btn:hover {
    background: #dce8f3;
    border-color: #2e86c1;
}

@media (max-width: 768px) {
    .chart-range-controls {
        flex-direction: column;
        align-items: flex-start;
    }
}