/* CNIRS - Chinese News Intelligent Retrieval System
   Main Stylesheet
*/

/* ========== Reset & Base Styles ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --bg-color: #f9fafb;
    --card-bg: #ffffff;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft JhengHei', 'PingFang TC', 'Noto Sans CJK TC', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 16px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* ========== Header ========== */
.header {
    text-align: center;
    padding: 40px 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 12px;
    margin-bottom: 30px;
    box-shadow: var(--shadow-lg);
}

.header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    font-weight: 700;
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 20px;
    line-height: 1.8;
}

/* ========== Navigation ========== */
.nav {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 20px;
}

.nav-link {
    color: white;
    text-decoration: none;
    padding: 8px 20px;
    border-radius: 20px;
    transition: background-color 0.3s;
    font-weight: 500;
}

.nav-link:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.nav-link.active {
    background-color: rgba(255, 255, 255, 0.3);
}

/* ========== Search Box ========== */
.search-box {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    margin-bottom: 30px;
}

#query-input {
    width: 100%;
    padding: 15px 20px;
    font-size: 1.1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 20px;
    transition: border-color 0.3s;
}

#query-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.search-options {
    display: flex;
    gap: 15px;
    align-items: flex-end;
    flex-wrap: wrap;
}

.option-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.option-group label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.option-group select,
.option-group input[type="number"] {
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    background: white;
}

.checkbox-group {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 5px;
    font-weight: normal;
    color: var(--text-primary);
}

/* ========== Buttons ========== */
.btn {
    padding: 12px 30px;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

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

.btn-primary:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background-color: #e5e7eb;
    color: var(--text-primary);
}

.btn-secondary:hover {
    background-color: #d1d5db;
    transform: translateY(-2px);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* ========== Guided Demo ========== */
.demo-guide-strip {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 18px;
    margin-bottom: 22px;
    border: 1px solid #bfdbfe;
    border-radius: 8px;
    background: #eff6ff;
}

.demo-guide-strip p,
.guide-hero p,
.guide-card p,
.pipeline-step p {
    color: var(--text-secondary);
}

.demo-guide-kicker {
    display: inline-block;
    margin-bottom: 4px;
    color: var(--primary-color);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.demo-guide-actions,
.guide-hero-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-items: center;
}

.demo-chip {
    display: inline-flex;
    align-items: center;
    min-height: 38px;
    padding: 8px 12px;
    border: 1px solid #bfdbfe;
    border-radius: 8px;
    background: #ffffff;
    color: var(--primary-color);
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
}

.demo-chip:hover {
    border-color: var(--primary-color);
    background: #dbeafe;
}

.guide-page {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-bottom: 48px;
}

.guide-hero,
.pipeline-card,
.guide-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.guide-hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 28px;
}

.guide-hero h2 {
    font-size: 1.7rem;
    line-height: 1.25;
    margin-bottom: 8px;
}

.pipeline-card {
    padding: 24px;
}

.pipeline-card h2 {
    margin-bottom: 18px;
}

.pipeline-steps {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 12px;
}

.pipeline-step {
    display: flex;
    flex-direction: column;
    gap: 8px;
    min-height: 150px;
    padding: 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    text-decoration: none;
    background: #ffffff;
}

.pipeline-step:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
}

.pipeline-step span {
    width: 30px;
    height: 30px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--primary-color);
    color: #ffffff;
    font-weight: 800;
}

.guide-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.guide-card {
    padding: 22px;
}

.guide-card h3 {
    margin-bottom: 10px;
}

.guide-card a {
    display: inline-block;
    margin-top: 14px;
    color: var(--primary-color);
    font-weight: 700;
    text-decoration: none;
}

/* ========== Demo Assistant ========== */
.demo-assistant-launcher {
    position: fixed;
    right: 22px;
    bottom: 22px;
    z-index: 9998;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px 12px 12px;
    border: 0;
    border-radius: 999px;
    background: #0f172a;
    color: #ffffff;
    box-shadow: var(--shadow-lg);
    font-weight: 800;
    cursor: pointer;
}

.demo-assistant-launcher span {
    display: grid;
    width: 28px;
    height: 28px;
    place-items: center;
    border-radius: 50%;
    background: #f59e0b;
    color: #111827;
}

.demo-assistant-app,
.demo-assistant-coach {
    position: fixed;
    z-index: 9999;
    border: 1px solid #cbd5e1;
    border-radius: 10px;
    background: #ffffff;
    box-shadow: 0 22px 50px rgba(15, 23, 42, 0.24);
}

.demo-assistant-app {
    right: 22px;
    bottom: 22px;
    width: 330px;
    max-width: calc(100vw - 32px);
    padding: 14px;
}

.demo-assistant-app-head,
.demo-assistant-progress,
.demo-assistant-controls {
    display: flex;
    align-items: center;
    gap: 10px;
}

.demo-assistant-app-head {
    justify-content: space-between;
}

.demo-assistant-app-title {
    color: #2563eb;
    font-size: 0.95rem;
    font-weight: 800;
}

.demo-assistant-app-subtitle {
    margin-top: 2px;
    color: #64748b;
    font-size: 0.78rem;
}

.demo-assistant-icon-btn {
    width: 30px;
    height: 30px;
    border: 0;
    border-radius: 8px;
    background: #e2e8f0;
    color: #0f172a;
    font-size: 1.2rem;
    cursor: pointer;
}

.demo-assistant-progress {
    margin: 12px 0;
    color: var(--text-secondary);
    font-size: 0.82rem;
}

.demo-assistant-meter {
    flex: 1;
    height: 7px;
    overflow: hidden;
    border-radius: 999px;
    background: #e2e8f0;
}

.demo-assistant-meter span {
    display: block;
    height: 100%;
    background: var(--primary-color);
}

.demo-assistant-current {
    padding: 10px;
    border-radius: 8px;
    background: #f8fafc;
}

.demo-assistant-current span {
    display: block;
    color: #64748b;
    font-size: 0.75rem;
}

.demo-assistant-current strong {
    display: block;
    margin-top: 3px;
    color: #0f172a;
}

.demo-assistant-mini-steps {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 6px;
    margin: 12px 0;
}

.demo-assistant-mini-steps button {
    height: 28px;
    border: 1px solid #cbd5e1;
    border-radius: 7px;
    background: #ffffff;
    color: #334155;
    font-size: 0.78rem;
    cursor: pointer;
}

.demo-assistant-mini-steps button.active {
    border-color: #2563eb;
    background: #dbeafe;
    color: #1d4ed8;
    font-weight: 800;
}

.demo-assistant-controls {
    flex-wrap: wrap;
    margin: 14px 0;
}

.demo-assistant-controls .btn {
    padding: 9px 12px;
    font-size: 0.9rem;
}

.demo-assistant-exit {
    width: 100%;
    border: 0;
    background: transparent;
    color: #64748b;
    cursor: pointer;
    font-weight: 700;
}

.demo-assistant-coach {
    width: 360px;
    max-width: calc(100vw - 28px);
    padding: 16px;
    animation: demoCoachIn 160ms ease-out;
}

.demo-assistant-coach.centered {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.demo-assistant-coach::after {
    position: absolute;
    width: 14px;
    height: 14px;
    background: #ffffff;
    border: inherit;
    content: "";
    transform: rotate(45deg);
}

.demo-assistant-coach.place-right::after {
    top: calc(50% - 7px);
    left: -8px;
    border-top: 0;
    border-right: 0;
}

.demo-assistant-coach.place-left::after {
    top: calc(50% - 7px);
    right: -8px;
    border-bottom: 0;
    border-left: 0;
}

.demo-assistant-coach.place-bottom::after {
    top: -8px;
    left: 28px;
    border-right: 0;
    border-bottom: 0;
}

.demo-assistant-coach.place-top::after {
    bottom: -8px;
    left: 28px;
    border-top: 0;
    border-left: 0;
}

.demo-assistant-coach-kicker {
    color: #2563eb;
    font-size: 0.76rem;
    font-weight: 800;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.demo-assistant-coach h2 {
    margin: 6px 0 8px;
    font-size: 1.25rem;
}

.demo-assistant-coach p {
    margin: 0;
    color: #475569;
}

.demo-assistant-action {
    margin: 12px 0;
    padding: 10px 12px;
    border-left: 4px solid var(--primary-color);
    border-radius: 6px;
    background: #eff6ff;
    color: #1e3a8a;
    font-size: 0.92rem;
}

.demo-assistant-coach-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 12px;
}

.demo-assistant-highlight {
    position: relative;
    z-index: 20;
    outline: 3px solid #f59e0b;
    outline-offset: 5px;
    box-shadow: 0 0 0 8px rgba(245, 158, 11, 0.18), 0 0 0 9999px rgba(15, 23, 42, 0.18);
    scroll-margin: 120px;
}

.language-toggle {
    display: inline-flex;
    gap: 4px;
    align-items: center;
    margin-left: 8px;
    padding: 4px;
    border: 1px solid #cbd5e1;
    border-radius: 999px;
    background: #ffffff;
}

.language-toggle button {
    min-width: 46px;
    padding: 6px 10px;
    border: 0;
    border-radius: 999px;
    background: transparent;
    color: #475569;
    cursor: pointer;
    font-weight: 800;
}

.language-toggle button.active {
    background: #2563eb;
    color: #ffffff;
}

@keyframes demoCoachIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 768px) {
    .demo-assistant-app {
        right: 12px;
        bottom: 12px;
        left: 12px;
        width: auto;
    }

    .demo-assistant-coach {
        right: 12px !important;
        bottom: 190px !important;
        left: 12px !important;
        top: auto !important;
        width: auto !important;
        max-height: 42vh;
        overflow-y: auto;
    }

    .demo-assistant-coach::after {
        display: none;
    }

    .demo-assistant-controls .btn,
    .demo-assistant-coach-actions .btn {
        flex: 1 1 120px;
    }

    .language-toggle {
        width: fit-content;
        margin: 8px auto 0;
    }
}

/* ========== Loading ========== */
.loading {
    text-align: center;
    padding: 40px;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

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

/* ========== Stats Panel ========== */
.stats-panel {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 8px;
    box-shadow: var(--shadow);
    margin-bottom: 30px;
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 20px;
}

.stat-item {
    text-align: center;
}

/* ========== Corpus Dashboard ========== */
.corpus-page {
    margin-bottom: 48px;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
}

.dashboard-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: var(--shadow);
    padding: 22px;
}

.dashboard-card-wide {
    grid-column: 1 / -1;
}

.dashboard-card h2 {
    font-size: 1.15rem;
    margin-bottom: 16px;
}

.dashboard-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 12px;
}

.status-pill {
    display: inline-flex;
    align-items: center;
    border-radius: 999px;
    background: #dbeafe;
    color: #1d4ed8;
    font-size: 0.82rem;
    font-weight: 700;
    padding: 6px 10px;
    text-transform: capitalize;
}

.readiness-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.readiness-item {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    display: flex;
    gap: 12px;
    padding: 14px;
}

.readiness-item p {
    color: var(--text-secondary);
    font-size: 0.92rem;
    margin-top: 2px;
}

.readiness-mark {
    align-items: center;
    border-radius: 6px;
    display: inline-flex;
    flex: 0 0 auto;
    font-size: 0.75rem;
    font-weight: 800;
    height: 26px;
    justify-content: center;
    min-width: 42px;
}

.readiness-item.passed .readiness-mark {
    background: #dcfce7;
    color: #166534;
}

.readiness-item.warning .readiness-mark {
    background: #fef3c7;
    color: #92400e;
}

.known-gaps {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    grid-column: 1 / -1;
    margin-top: 4px;
}

.known-gaps span {
    background: #fff7ed;
    border: 1px solid #fed7aa;
    border-radius: 999px;
    color: #9a3412;
    font-size: 0.84rem;
    padding: 6px 10px;
}

.bar-list {
    display: grid;
    gap: 12px;
}

.bar-list.compact {
    max-height: 360px;
    overflow: auto;
}

.bar-row-label,
.completeness-top {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 6px;
}

.bar-row-label span,
.completeness-top strong {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.bar-row-label strong,
.completeness-top span {
    color: var(--text-secondary);
    flex: 0 0 auto;
    font-size: 0.9rem;
}

.bar-track {
    background: #eef2f7;
    border-radius: 999px;
    height: 9px;
    overflow: hidden;
}

.bar-fill {
    background: linear-gradient(90deg, #2563eb, #10b981);
    border-radius: inherit;
    height: 100%;
}

.detail-list {
    display: grid;
    gap: 12px;
}

.detail-list div {
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    gap: 16px;
    padding-bottom: 10px;
}

.detail-list span {
    color: var(--text-secondary);
    text-align: right;
}

.completeness-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.completeness-item {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 14px;
}

.completeness-item small {
    color: var(--text-secondary);
    display: block;
    margin-top: 8px;
}

.completeness-item.needs_work .bar-fill {
    background: linear-gradient(90deg, #ef4444, #f59e0b);
}

.completeness-item.watch .bar-fill {
    background: linear-gradient(90deg, #f59e0b, #10b981);
}

.flow-diagram {
    display: grid;
    grid-template-columns: repeat(7, minmax(120px, 1fr));
    gap: 12px;
    overflow-x: auto;
}

.flow-step {
    background: #f8fafc;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    min-height: 145px;
    padding: 14px;
}

.flow-index {
    align-items: center;
    background: var(--primary-color);
    border-radius: 50%;
    color: white;
    display: flex;
    font-weight: 800;
    height: 30px;
    justify-content: center;
    margin-bottom: 12px;
    width: 30px;
}

.flow-step p,
.external-source p,
.external-source small {
    color: var(--text-secondary);
}

.external-source-list {
    display: grid;
    gap: 14px;
}

.external-source {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 14px;
}

.external-source code {
    background: #f3f4f6;
    border-radius: 4px;
    display: inline-block;
    font-size: 0.86rem;
    margin: 6px 0;
    padding: 3px 6px;
}

.topic-controls {
    display: grid;
    grid-template-columns: minmax(260px, 1fr) 150px 90px 110px auto;
    gap: 12px;
    margin-bottom: 14px;
}

.topic-controls input,
.topic-controls select {
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.95rem;
    padding: 10px 12px;
}

.topic-results {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    margin-top: 16px;
}

.topic-card {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
}

.topic-card-header {
    align-items: start;
    display: flex;
    gap: 12px;
    justify-content: space-between;
}

.topic-card-header h3 {
    font-size: 1rem;
    line-height: 1.35;
}

.topic-card-header span {
    color: var(--text-secondary);
    flex: 0 0 auto;
    font-size: 0.85rem;
}

.topic-keywords {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin: 12px 0;
}

.topic-keywords span {
    background: #eef2ff;
    border: 1px solid #c7d2fe;
    border-radius: 999px;
    color: #3730a3;
    font-size: 0.8rem;
    padding: 4px 8px;
}

.topic-documents {
    display: grid;
    gap: 8px;
}

.topic-doc {
    background: #f8fafc;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    padding: 10px;
    text-align: left;
}

.topic-doc:hover {
    border-color: var(--primary-color);
}

.topic-doc strong,
.topic-doc small {
    display: block;
}

.topic-doc small {
    color: var(--text-secondary);
    margin-top: 4px;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 5px;
}

/* ========== Results ========== */
.results-header {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 8px;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
}

.results-header h2 {
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.results-meta {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.results-meta span {
    display: flex;
    align-items: center;
    gap: 5px;
}

/* Export Actions */
.export-actions {
    display: flex;
    gap: 10px;
    margin-top: 15px;
}

.btn-export {
    padding: 8px 16px;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-color);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 5px;
}

.btn-export:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.btn-export-json:hover {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    color: white;
    border-color: #3b82f6;
}

.btn-export-csv:hover {
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
    border-color: #10b981;
}

.btn-export:active {
    transform: translateY(0);
}

.btn-export:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.results-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.result-item {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 8px;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    border-left: 4px solid var(--primary-color);
}

.result-item:hover {
    box-shadow: var(--shadow-lg);
    transform: translateX(5px);
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 10px;
}

.result-rank {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    min-width: 40px;
}

.result-title {
    flex: 1;
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 15px;
}

.result-score {
    background: var(--primary-color);
    color: white;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.9rem;
    font-weight: 600;
}

.result-snippet {
    color: var(--text-secondary);
    margin-top: 10px;
    line-height: 1.6;
}

.result-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
}

.result-explanation {
    margin-top: 12px;
    padding-top: 10px;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.result-explanation summary {
    cursor: pointer;
    color: var(--primary-color);
    font-weight: 600;
}

.result-explain-row {
    margin-top: 8px;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    align-items: center;
}

/* Unified explanation panels */
.explain-panel {
    margin-top: 12px;
    padding-top: 10px;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.explain-panel summary {
    cursor: pointer;
    color: var(--primary-color);
    font-weight: 700;
}

.explain-panel-static {
    padding: 14px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: #f8fafc;
}

.explain-section {
    margin-top: 10px;
}

.explain-section:first-child {
    margin-top: 0;
}

.explain-section-title {
    margin-bottom: 6px;
    color: var(--text-primary);
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
}

.explain-chip-row {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.btn-mini {
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: white;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 600;
    padding: 6px 10px;
}

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

.feedback-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.diagnostics-output {
    margin-top: 10px;
}

.diagnostic-model {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-top: 10px;
    padding: 10px;
}

.diagnostic-model-title,
.diagnostic-submodel {
    font-weight: 700;
    margin-bottom: 8px;
}

.diagnostic-submodel {
    color: var(--text-secondary);
    margin-top: 12px;
}

.diagnostic-table {
    border-collapse: collapse;
    font-size: 0.82rem;
    margin-top: 8px;
    width: 100%;
}

.diagnostic-table th,
.diagnostic-table td {
    border-bottom: 1px solid var(--border-color);
    padding: 6px 8px;
    text-align: left;
}

.diagnostic-table th {
    color: var(--text-secondary);
    font-weight: 700;
}

.diagnostic-table .heat-on {
    background: #dcfce7;
    color: #166534;
    font-weight: 700;
}

.diagnostic-table .heat-off {
    color: var(--text-secondary);
}

.diagnostics-page-results {
    margin-top: 24px;
}

#diag-query,
#diag-doc-id {
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    padding: 10px 14px;
}

#diag-query {
    margin-bottom: 14px;
    width: 100%;
}

#diag-doc-id {
    min-width: 160px;
}

.diagnostics-document,
.diagnostics-card {
    background: var(--card-bg);
    border-radius: 8px;
    box-shadow: var(--shadow);
    margin-bottom: 18px;
    overflow-x: auto;
    padding: 18px;
}

.diagnostics-card-grid {
    display: grid;
    gap: 18px;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.feedback-control-panel {
    align-items: flex-end;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: var(--shadow);
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 20px;
    padding: 20px;
}

.feedback-dashboard {
    display: grid;
    gap: 20px;
}

.feedback-empty-state {
    background: #fff7ed;
    border: 1px solid #fed7aa;
    border-radius: 8px;
    color: #9a3412;
    padding: 16px 18px;
}

.feedback-summary-grid {
    display: grid;
    gap: 14px;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.feedback-summary-card,
.feedback-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.feedback-summary-card {
    padding: 16px;
}

.feedback-summary-card span {
    color: var(--text-secondary);
    display: block;
    font-size: 0.86rem;
    margin-bottom: 8px;
}

.feedback-summary-card strong {
    color: var(--text-primary);
    display: block;
    font-size: 1.55rem;
}

.feedback-grid {
    display: grid;
    gap: 18px;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
}

.feedback-card {
    overflow-x: auto;
    padding: 18px;
}

.feedback-card h2 {
    color: var(--text-primary);
    font-size: 1.05rem;
    margin: 0 0 14px;
}

.feedback-card-wide {
    grid-column: 1 / -1;
}

.feedback-list {
    display: grid;
    gap: 10px;
}

.feedback-list-item {
    border-bottom: 1px solid var(--border-color);
    display: flex;
    gap: 12px;
    justify-content: space-between;
    padding: 10px 0;
}

.feedback-list-item strong {
    color: var(--text-primary);
}

.feedback-list-item span {
    color: var(--text-secondary);
    white-space: nowrap;
}

.relevance-bars {
    display: grid;
    gap: 10px;
}

.relevance-bar-row {
    align-items: center;
    display: grid;
    gap: 10px;
    grid-template-columns: 70px 1fr 42px;
}

.relevance-bar {
    background: #e2e8f0;
    border-radius: 999px;
    height: 10px;
    overflow: hidden;
}

.relevance-bar i {
    background: #2563eb;
    display: block;
    height: 100%;
}

.feedback-notice {
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    border-radius: 8px;
    color: #1e40af;
    margin: 14px 0 0;
    padding: 10px 12px;
}

.ltr-train-controls {
    align-items: end;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin: 14px 0;
}

.ltr-train-controls label {
    color: var(--text-secondary);
    display: grid;
    font-weight: 700;
    gap: 6px;
}

#ltr-limit {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 10px 12px;
    width: 130px;
}

.ltr-training-result {
    display: grid;
    gap: 14px;
    margin-top: 14px;
}

.explain-chip {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 5px 9px;
    border: 1px solid #dbe3ef;
    border-radius: 8px;
    background: #fff;
    color: #475569;
    font-size: 0.78rem;
    line-height: 1.25;
}

.explain-chip strong {
    color: #1f2937;
}

.score-chip {
    background: #eff6ff;
    border-color: #bfdbfe;
    color: #1e40af;
}

.field-chip,
.boost-chip {
    background: #f0fdf4;
    border-color: #bbf7d0;
    color: #166534;
}

.feature-chip {
    background: #f8fafc;
    border-color: #cbd5e1;
    color: #334155;
}

.reason-chip {
    background: #fff7ed;
    border-color: #fed7aa;
    color: #9a3412;
}

.term-chip {
    background: #fefce8;
    border-color: #fde68a;
    color: #854d0e;
}

.explain-muted {
    color: #94a3b8;
    font-size: 0.82rem;
}

.model-badge {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.model-badge-name {
    color: var(--text-primary);
    font-weight: 800;
}

.model-badge-description {
    color: var(--text-secondary);
    font-size: 0.78rem;
    line-height: 1.35;
}

.rank-change-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.82rem;
}

.rank-change-table th,
.rank-change-table td {
    padding: 7px 8px;
    border-bottom: 1px solid #e5e7eb;
    text-align: left;
}

.status-unavailable {
    color: #991b1b;
    font-weight: 700;
}

/* Metadata Chips */
.meta-chip {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    font-size: 0.75rem;
    border-radius: 16px;
    background: #f1f5f9;
    color: #475569;
    font-weight: 500;
    white-space: nowrap;
}

.meta-chip.meta-docid {
    background: #f0fdf4;
    color: #166534;
}

.meta-chip.meta-source {
    background: #fef3c7;
    color: #92400e;
}

.meta-chip.meta-date {
    background: #eff6ff;
    color: #1e40af;
}

.meta-chip.meta-category {
    background: #fce7f3;
    color: #9d174d;
}

.meta-chip.meta-author {
    background: #f5f3ff;
    color: #5b21b6;
}

/* ========== Comparison ========== */
.comparison-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.model-results {
    background: var(--card-bg);
    border-radius: 8px;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.model-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 15px 20px;
    font-weight: 600;
}

.model-stats {
    padding: 15px 20px;
    background: #f3f4f6;
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
}

.model-results-list {
    padding: 15px;
    max-height: 600px;
    overflow-y: auto;
}

.model-result-item {
    padding: 10px;
    border-bottom: 1px solid var(--border-color);
}

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

.model-result-title {
    font-weight: 600;
    margin-bottom: 5px;
}

.model-result-score {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ========== About Page ========== */
.about-content {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.about-section {
    margin-bottom: 40px;
}

.about-section h2 {
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 1.8rem;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 10px;
}

.about-section ul {
    list-style-position: inside;
    padding-left: 20px;
}

.about-section li {
    margin-bottom: 10px;
    line-height: 1.8;
}

.model-card {
    background: #f9fafb;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 15px;
    border-left: 4px solid var(--primary-color);
}

.model-card h3 {
    color: var(--primary-color);
    margin-bottom: 10px;
}

.model-card p {
    margin-bottom: 8px;
    line-height: 1.6;
}

/* ========== Footer ========== */
.footer {
    text-align: center;
    padding: 30px 20px;
    margin-top: 50px;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
}

/* ========== Responsive ========== */
@media (max-width: 768px) {
    .header h1 {
        font-size: 2rem;
    }

    .search-options {
        flex-direction: column;
        align-items: stretch;
    }

    .option-group {
        width: 100%;
    }

    .btn {
        width: 100%;
    }

    .comparison-grid {
        grid-template-columns: 1fr;
    }

    .results-meta {
        flex-direction: column;
        gap: 10px;
    }
}

/* ========== Utility Classes ========== */
.text-center {
    text-align: center;
}

.mt-20 {
    margin-top: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}

.hidden {
    display: none !important;
}

/* ========== Modal (Document Details) ========== */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.6);
    animation: fadeIn 0.3s;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background-color: var(--card-bg);
    margin: 2% auto;
    padding: 0;
    border-radius: 12px;
    width: 90%;
    max-width: 900px;
    max-height: 90vh;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: slideDown 0.3s;
}

@keyframes slideDown {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    padding: 25px 30px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 12px 12px 0 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    margin: 0;
    font-size: 1.5rem;
    flex: 1;
}

.modal-close {
    color: white;
    font-size: 32px;
    font-weight: bold;
    cursor: pointer;
    background: none;
    border: none;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background 0.3s;
}

.modal-close:hover,
.modal-close:focus {
    background: rgba(255, 255, 255, 0.2);
}

.modal-body {
    padding: 30px;
    max-height: calc(90vh - 200px);
    overflow-y: auto;
}

.doc-meta {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    padding: 15px 0;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 25px;
}

.doc-meta-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.doc-meta-item strong {
    color: var(--text-primary);
}

.doc-content {
    line-height: 1.8;
    font-size: 1.05rem;
    color: var(--text-primary);
    margin-bottom: 30px;
}

.doc-content p {
    margin-bottom: 15px;
}

.doc-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 6px;
    transition: background 0.3s;
    font-weight: 500;
}

.doc-link:hover {
    background: var(--secondary-color);
}

.similar-docs {
    margin-top: 30px;
    padding-top: 30px;
    border-top: 2px solid var(--border-color);
}

.similar-docs h3 {
    margin-bottom: 20px;
    color: var(--text-primary);
}

.similar-doc-item {
    padding: 15px;
    margin-bottom: 12px;
    background: var(--bg-color);
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
    cursor: pointer;
    transition: all 0.3s;
}

.similar-doc-item:hover {
    background: #eff6ff;
    transform: translateX(5px);
    box-shadow: var(--shadow);
}

.similar-doc-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.similar-doc-score {
    font-size: 0.85rem;
    color: var(--success-color);
    background: #d1fae5;
    padding: 3px 10px;
    border-radius: 12px;
    font-weight: 600;
}

.similar-doc-meta {
    font-size: 0.9rem;
    color: var(--text-secondary);
    display: flex;
    gap: 15px;
}

/* Clickable result items */
.result-item {
    cursor: pointer;
}

.result-item:hover {
    background: #eff6ff;
}

.result-title {
    cursor: pointer;
    transition: color 0.3s;
}

.result-title:hover {
    color: var(--primary-color);
}

/* ========== Advanced Filters ========== */
.filter-toggle {
    text-align: center;
    margin: 15px 0;
}

.filter-toggle-btn {
    padding: 10px 25px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    transition: all 0.3s;
}

.filter-toggle-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.filter-panel {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 25px;
    margin: 20px 0;
    border: 2px solid var(--border-color);
    box-shadow: var(--shadow);
}

.filter-panel h3 {
    margin-bottom: 20px;
    color: var(--text-primary);
    font-size: 1.1rem;
}

.filter-group {
    margin-bottom: 20px;
}

.filter-group label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
    color: var(--text-primary);
}

.checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 15px;
    background: var(--bg-color);
    border: 2px solid var(--border-color);
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s;
    user-select: none;
}

.checkbox-item:hover {
    background: #eff6ff;
    border-color: var(--primary-color);
}

.checkbox-item input[type="checkbox"] {
    cursor: pointer;
    width: 16px;
    height: 16px;
}

.checkbox-item.checked {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-color: var(--secondary-color);
}

.date-range {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.date-input {
    padding: 10px 15px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.95rem;
    transition: border-color 0.3s;
}

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

.filter-actions {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

.filter-btn {
    padding: 10px 25px;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.filter-btn-apply {
    background: var(--success-color);
    color: white;
}

.filter-btn-apply:hover {
    background: #059669;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.filter-btn-clear {
    background: var(--bg-color);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.filter-btn-clear:hover {
    background: #e5e7eb;
}

.filter-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 12px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 15px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-right: 8px;
}

/* ========== Evaluation Page Styles ========== */

.eval-control-panel {
    background: var(--card-bg);
    padding: 25px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    margin-bottom: 30px;
}

.eval-control-panel h2 {
    font-size: 1.4rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.eval-config {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.config-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.config-group label {
    font-weight: 600;
    color: var(--text-primary);
}

.config-group input[type="text"],
.config-group input[type="number"],
.config-group select {
    padding: 10px 15px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    background: white;
    transition: border-color 0.3s;
}

.config-group input:focus,
.config-group select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.evaluation-meta {
    margin-bottom: 25px;
}

.evaluation-notice {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 14px 16px;
    border-left: 4px solid var(--primary-color);
    background: #eff6ff;
    color: var(--text-primary);
    border-radius: 8px;
    margin-bottom: 16px;
}

.evaluation-notice span {
    color: var(--text-secondary);
    font-size: 0.92rem;
}

.evaluation-meta-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
}

.evaluation-meta-grid > div {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 14px;
    box-shadow: var(--shadow);
}

.evaluation-meta-grid span,
.metric-card-subline {
    display: block;
    color: var(--text-secondary);
    font-size: 0.82rem;
}

.evaluation-meta-grid strong {
    display: block;
    color: var(--text-primary);
    margin-top: 4px;
}

/* Metrics Summary Cards */
.metrics-summary {
    margin-bottom: 30px;
}

.metrics-summary h2 {
    font-size: 1.4rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.metrics-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.metric-card {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: transform 0.3s;
}

.metric-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
}

.metric-card-header {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
    font-weight: 600;
}

.metric-card-value {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 5px;
}

.metric-card-model {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.metric-card-subline {
    margin-top: 8px;
}

/* Charts Section */
.charts-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 25px;
    margin-bottom: 30px;
}

.chart-container {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.chart-container h3 {
    font-size: 1.1rem;
    margin-bottom: 15px;
    color: var(--text-primary);
    text-align: center;
}

.chart-container canvas {
    max-height: 300px;
}

/* PR Curve Section */
.pr-curve-section {
    margin-bottom: 30px;
}

.pr-curve-section h2 {
    font-size: 1.4rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.chart-container-large {
    background: var(--card-bg);
    padding: 25px;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.chart-container-large canvas {
    max-height: 400px;
}

/* Comparison Table */
.comparison-table-section {
    margin-bottom: 30px;
}

.comparison-table-section h2 {
    font-size: 1.4rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.comparison-table {
    background: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.comparison-table table {
    width: 100%;
    border-collapse: collapse;
}

.comparison-table th {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 15px;
    text-align: left;
    font-weight: 600;
}

.comparison-table td {
    padding: 12px 15px;
    border-bottom: 1px solid var(--border-color);
}

.comparison-table tr:hover {
    background: #f9fafb;
}

.comparison-table .best-value {
    font-weight: 700;
    color: var(--primary-color);
}

.per-query-item {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: var(--shadow);
    margin-bottom: 12px;
    overflow: hidden;
}

.per-query-item summary {
    cursor: pointer;
    display: flex;
    gap: 12px;
    align-items: center;
    padding: 14px 16px;
}

.per-query-item summary span {
    color: var(--text-secondary);
}

.per-query-model-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 12px;
    padding: 0 16px 16px;
}

.per-query-model {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px;
    background: #f9fafb;
}

.per-query-model-title {
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.per-query-metrics {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 10px;
}

.per-query-metrics span,
.judgment-pill {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 999px;
    color: var(--text-secondary);
    font-size: 0.78rem;
    padding: 4px 8px;
}

.judged-results {
    margin: 0;
    padding-left: 20px;
}

.judged-results li {
    margin-bottom: 8px;
}

.judgment-pill.relevant {
    border-color: #16a34a;
    color: #166534;
    background: #dcfce7;
}

.judgment-pill.unjudged {
    border-color: #d1d5db;
    color: #6b7280;
}

/* Responsive Design for Evaluation */
@media (max-width: 768px) {
    .charts-section {
        grid-template-columns: 1fr;
    }
    
    .metrics-cards {
        grid-template-columns: repeat(2, 1fr);
    }

    .per-query-item summary {
        align-items: flex-start;
        flex-direction: column;
    }
}

/* Chart Controls */
.chart-controls {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    margin-bottom: 25px;
}

.chart-controls h3 {
    font-size: 1.1rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.control-options {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.control-options .checkbox-item {
    padding: 10px 18px;
    background: var(--bg-color);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
}

.control-options .checkbox-item input[type="checkbox"]:checked + span {
    font-weight: 700;
}

.control-options .checkbox-item:has(input:checked) {
    background: linear-gradient(135deg, #eff6ff, #dbeafe);
    border-color: var(--primary-color);
}

/* PR Charts Grid */
.pr-charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 25px;
}

@media (max-width: 1200px) {
    .pr-charts-grid {
        grid-template-columns: 1fr;
    }
}

/* ========== Enhanced Document Modal Styles ========== */

.doc-header {
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
}

.doc-header h3 {
    font-size: 1.6rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.doc-meta-chips {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.meta-chip {
    padding: 6px 14px;
    background: linear-gradient(135deg, #eff6ff, #dbeafe);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary-color);
}

.doc-insight-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
    gap: 18px;
    margin-bottom: 22px;
}

.doc-kwic-section,
.doc-explanation-section,
.doc-tools-section {
    margin-bottom: 25px;
    padding: 20px;
    background: var(--card-bg);
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.doc-kwic-section h4,
.doc-explanation-section h4 {
    font-size: 1.1rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.summary-list {
    padding: 15px 15px 15px 34px;
    background: white;
    border-radius: 8px;
    line-height: 1.8;
}

.summary-list li + li {
    margin-top: 8px;
}

.kwic-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.kwic-item {
    padding: 12px 14px;
    background: white;
    border-left: 4px solid var(--primary-color);
    border-radius: 8px;
    line-height: 1.7;
}

.kwic-inline-controls,
.kwic-controls {
    display: flex;
    gap: 10px;
    align-items: center;
    margin-top: 12px;
}

.kwic-inline-controls input,
.kwic-controls input {
    min-width: 220px;
    flex: 1;
    padding: 8px 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
}

.explanation-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.empty-state {
    padding: 14px;
    color: var(--text-secondary);
    background: var(--bg-color);
    border-radius: 8px;
}

@media (max-width: 900px) {
    .doc-insight-grid {
        grid-template-columns: 1fr;
    }

    .kwic-inline-controls,
    .kwic-controls {
        align-items: stretch;
        flex-direction: column;
    }
}

/* Metadata Grid */
.doc-metadata {
    margin-bottom: 25px;
    padding: 20px;
    background: var(--bg-color);
    border-radius: 10px;
}

.doc-metadata h4 {
    font-size: 1.1rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.metadata-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 12px;
}

.metadata-item {
    padding: 10px;
    background: white;
    border-radius: 6px;
    border-left: 3px solid var(--primary-color);
}

.metadata-key {
    font-weight: 700;
    color: var(--text-secondary);
    margin-right: 8px;
}

.metadata-value {
    color: var(--text-primary);
}

/* Document Content */
.doc-content-section {
    margin-bottom: 25px;
}

.doc-content-section h4 {
    font-size: 1.1rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.doc-content {
    padding: 20px;
    background: var(--bg-color);
    border-radius: 10px;
    line-height: 1.8;
    max-height: 400px;
    overflow-y: auto;
    white-space: pre-wrap;
    word-wrap: break-word;
}

/* Summary Section */
.doc-summary-section, .doc-keywords-section {
    margin-bottom: 25px;
    padding: 20px;
    background: var(--card-bg);
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.doc-summary-section h4, .doc-keywords-section h4 {
    font-size: 1.1rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.summary-controls, .keywords-controls {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
    align-items: center;
}

.summary-controls select,
.summary-controls input,
.keywords-controls input {
    padding: 8px 12px;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.9rem;
}

.btn-generate {
    padding: 8px 16px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    transition: transform 0.2s;
}

.btn-generate:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

.btn-generate:active {
    transform: translateY(0);
}

/* Processing Indicator */
.processing-indicator {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 15px;
    background: #eff6ff;
    border-radius: 8px;
    margin-bottom: 10px;
}

.spinner-small {
    width: 20px;
    height: 20px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.processing-time {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 8px;
}

/* Summary Text */
.summary-text {
    padding: 15px;
    background: white;
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
    line-height: 1.8;
}

/* Keywords Cloud */
.keywords-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    padding: 15px;
    background: white;
    border-radius: 8px;
}

.keyword-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background: linear-gradient(135deg, #f0fdf4, #dcfce7);
    border: 2px solid #86efac;
    border-radius: 20px;
    font-weight: 600;
    color: #059669;
    transition: transform 0.2s;
}

.keyword-tag:hover {
    transform: scale(1.05);
}

.keyword-score {
    padding: 2px 6px;
    background: #059669;
    color: white;
    border-radius: 10px;
    font-size: 0.75rem;
}

/* Similar Documents */
.similar-docs-section {
    margin-top: 25px;
    padding: 20px;
    background: var(--card-bg);
    border-radius: 10px;
}

.similar-docs-section h4 {
    font-size: 1.1rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.similar-docs-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.similar-doc-item {
    padding: 15px;
    background: white;
    border-radius: 8px;
    border-left: 4px solid var(--secondary-color);
    cursor: pointer;
    transition: all 0.3s;
}

.similar-doc-item:hover {
    transform: translateX(5px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.similar-doc-title {
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.similar-doc-meta {
    display: flex;
    gap: 15px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Algorithm Method Label */
.method-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
    padding: 6px 12px;
    background: linear-gradient(135deg, #f0f9ff, #e0f2fe);
    border-left: 3px solid var(--primary-color);
    border-radius: 4px;
    font-weight: 600;
}

/* Enhanced Controls Styling */
.summary-controls select,
.keywords-controls select {
    padding: 8px 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: white;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.summary-controls select:hover,
.keywords-controls select:hover {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.summary-controls select:focus,
.keywords-controls select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.2);
}

/* ========== Main Layout: Sidebar + Content ========== */
.main-layout {
    display: flex;
    gap: 24px;
    align-items: flex-start;
}

/* ========== Left Sidebar: Filter Panel ========== */
.filter-sidebar {
    width: 280px;
    flex-shrink: 0;
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: var(--shadow);
    position: sticky;
    top: 20px;
    max-height: calc(100vh - 40px);
    overflow-y: auto;
}

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 12px 12px 0 0;
}

.sidebar-header h3 {
    font-size: 1rem;
    font-weight: 600;
    margin: 0;
}

.close-sidebar-btn {
    display: none;
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
    line-height: 1;
    opacity: 0.8;
    transition: opacity 0.2s;
}

.close-sidebar-btn:hover {
    opacity: 1;
}

/* Facet Groups */
.facet-groups {
    padding: 16px;
}

.facet-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 20px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.spinner-small {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Active Filters Display */
.active-filters {
    padding: 0 16px;
}

.active-filters:empty {
    display: none;
}

.active-filters-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    font-weight: 500;
}

.active-filter-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 12px;
}

.filter-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    background: linear-gradient(135deg, #dbeafe, #bfdbfe);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.filter-tag-remove {
    cursor: pointer;
    opacity: 0.7;
    transition: opacity 0.2s;
    font-size: 1rem;
    line-height: 1;
}

.filter-tag-remove:hover {
    opacity: 1;
}

/* Filter Actions */
.filter-actions {
    padding: 16px;
    border-top: 1px solid var(--border-color);
}

.filter-btn {
    width: 100%;
    padding: 10px 16px;
    border: none;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.filter-btn-clear {
    background: #fef2f2;
    color: var(--danger-color);
    border: 1px solid #fecaca;
}

.filter-btn-clear:hover {
    background: #fee2e2;
}

/* Main Content Area */
.search-content {
    flex: 1;
    min-width: 0;
}

/* Mobile Filter Toggle Button */
.mobile-filter-toggle {
    display: none;
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 12px 20px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 30px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
    z-index: 100;
    transition: all 0.3s;
}

.mobile-filter-toggle:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
}

.mobile-filter-toggle .filter-icon {
    margin-right: 6px;
}

/* Sidebar Overlay (Mobile) */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    transition: opacity 0.3s;
}

.sidebar-overlay.active {
    display: block;
    opacity: 1;
}

/* ========== Mobile Responsive: Sidebar Drawer ========== */
@media (max-width: 900px) {
    .main-layout {
        flex-direction: column;
    }

    .filter-sidebar {
        position: fixed;
        top: 0;
        left: -320px;
        width: 300px;
        height: 100vh;
        max-height: 100vh;
        border-radius: 0;
        z-index: 1000;
        transition: left 0.3s ease;
    }

    .filter-sidebar.open {
        left: 0;
    }

    .close-sidebar-btn {
        display: block;
    }

    .mobile-filter-toggle {
        display: flex;
        align-items: center;
    }

    .search-content {
        width: 100%;
    }

    /* Adjust header for mobile */
    .sidebar-header {
        border-radius: 0;
    }
}

/* ========== Tablet Adjustments ========== */
@media (max-width: 1024px) and (min-width: 901px) {
    .filter-sidebar {
        width: 240px;
    }
}

/* ========== Small Mobile ========== */
@media (max-width: 480px) {
    .mobile-filter-toggle {
        padding: 10px 16px;
        font-size: 0.9rem;
    }

    .filter-sidebar {
        width: 280px;
    }
}

/* ========== Analytics Panel ========== */
.analytics-panel {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    border-radius: 12px;
    margin-bottom: 1.5rem;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    border: 1px solid #e2e8f0;
}

.analytics-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
    background: linear-gradient(90deg, #3b82f6 0%, #2563eb 100%);
    color: white;
}

.analytics-header h3 {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
}

.btn-toggle-analytics {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    width: 28px;
    height: 28px;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.2s ease;
    font-size: 0.8rem;
}

.btn-toggle-analytics:hover {
    background: rgba(255, 255, 255, 0.3);
}

.analytics-content {
    padding: 1.25rem;
}

.analytics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.analytics-card {
    background: white;
    border-radius: 10px;
    padding: 1rem;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
    border: 1px solid #e5e7eb;
}

.analytics-card h4 {
    margin: 0 0 0.75rem 0;
    font-size: 0.9rem;
    color: #374151;
    font-weight: 600;
    text-align: center;
}

.analytics-card canvas {
    max-height: 180px;
}

.analytics-card-wide {
    grid-column: span 2;
}

@media (max-width: 768px) {
    .analytics-card-wide {
        grid-column: span 1;
    }
}

/* Model Compare Mini */
.model-compare-mini {
    text-align: center;
}

.model-compare-results {
    margin-top: 1rem;
}

.compare-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.compare-table th,
.compare-table td {
    padding: 0.6rem 0.75rem;
    text-align: left;
    border-bottom: 1px solid #e5e7eb;
}

.compare-table th {
    background: #f9fafb;
    font-weight: 600;
    color: #374151;
}

.compare-table tr.best-model {
    background: linear-gradient(90deg, #ecfdf5 0%, #d1fae5 100%);
}

.compare-table tr.best-model td {
    font-weight: 600;
    color: #059669;
}

.compare-note {
    margin-top: 0.75rem;
    font-size: 0.8rem;
    color: #6b7280;
    text-align: center;
}

/* Spinner small for inline loading */
.spinner-small {
    display: inline-block;
    width: 14px;
    height: 14px;
    border: 2px solid #e5e7eb;
    border-top-color: #3b82f6;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-right: 6px;
    vertical-align: middle;
}

/* ========== Evaluation Radar Chart ========== */
.radar-container {
    max-width: 500px;
    margin: 0 auto;
    padding: 1rem;
}

.radar-legend {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    margin-top: 1rem;
}

.radar-legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
}

.radar-legend-color {
    width: 12px;
    height: 12px;
    border-radius: 3px;
}

/* ========== Query Expansion Visualization ========== */
.expansion-viz {
    background: #f8fafc;
    border-radius: 10px;
    padding: 1.25rem;
    margin-top: 1rem;
}

.expansion-terms-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
    margin-bottom: 1rem;
}

.expansion-term {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.4rem 0.8rem;
    background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
    color: #1e40af;
    border-radius: 20px;
    font-size: 0.85rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.expansion-term:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(59, 130, 246, 0.3);
}

.expansion-term-weight {
    font-size: 0.7rem;
    opacity: 0.7;
}

.drift-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-top: 1rem;
    padding: 0.75rem;
    border-radius: 8px;
    font-size: 0.85rem;
}

.drift-indicator.low {
    background: #d1fae5;
    color: #065f46;
}

.drift-indicator.medium {
    background: #fef3c7;
    color: #92400e;
}

.drift-indicator.high {
    background: #fee2e2;
    color: #991b1b;
}

.drift-bar {
    flex: 1;
    max-width: 200px;
    height: 8px;
    background: #e5e7eb;
    border-radius: 4px;
    overflow: hidden;
}

.drift-bar-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 0.3s ease;
}

.drift-indicator.low .drift-bar-fill {
    background: #10b981;
}

.drift-indicator.medium .drift-bar-fill {
    background: #f59e0b;
}

.drift-indicator.high .drift-bar-fill {
    background: #ef4444;
}

@media (max-width: 1024px) {
    .pipeline-steps,
    .guide-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 768px) {
    .demo-guide-strip,
    .guide-hero {
        align-items: stretch;
        flex-direction: column;
    }

    .demo-guide-actions,
    .guide-hero-actions {
        width: 100%;
    }

    .demo-chip,
    .guide-hero-actions .btn {
        justify-content: center;
        width: 100%;
    }

    .pipeline-steps,
    .guide-grid {
        grid-template-columns: 1fr;
    }
}

/* Dashboard visualizations */
.dashboard-chart-section,
.analysis-graph-layout {
    margin: 24px 0;
}

.dashboard-chart-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 18px;
    margin: 18px 0;
}

.chart-container,
.chart-container-large {
    min-height: 280px;
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    padding: 18px;
    box-shadow: 0 1px 3px rgba(15, 23, 42, 0.08);
}

.chart-container canvas,
.chart-container-large canvas {
    width: 100% !important;
    height: 220px !important;
}

.chart-container-wide {
    grid-column: 1 / -1;
}

/* Analysis graph */
.analysis-graph-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 340px;
    gap: 20px;
    align-items: start;
}

.analysis-graph-stage,
.analysis-graph-panel {
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(15, 23, 42, 0.08);
}

.analysis-graph-stage {
    overflow: hidden;
}

.analysis-flow {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
    padding: 14px 16px;
    border-bottom: 1px solid #e5e7eb;
    background: #f8fafc;
}

.analysis-flow-step {
    padding: 6px 10px;
    border-radius: 999px;
    background: #e0f2fe;
    color: #075985;
    font-size: 0.86rem;
    font-weight: 700;
}

.analysis-flow-arrow {
    color: #64748b;
    font-weight: 700;
}

.analysis-graph-svg {
    display: block;
    width: 100%;
    min-height: 680px;
    background:
        linear-gradient(#f8fafc 1px, transparent 1px),
        linear-gradient(90deg, #f8fafc 1px, transparent 1px);
    background-size: 32px 32px;
}

.graph-edge {
    stroke: #94a3b8;
    stroke-width: 1.4;
}

.graph-edge-label {
    fill: #475569;
    font-size: 11px;
    text-anchor: middle;
}

.graph-node {
    cursor: pointer;
    transition: transform 0.16s ease;
}

.graph-node:focus {
    outline: none;
}

.graph-node:hover,
.graph-node:focus {
    transform: scale(1.18);
}

.graph-node-circle {
    stroke: #0f172a;
    stroke-width: 1.5;
    fill: #dbeafe;
    filter: drop-shadow(0 4px 8px rgba(15, 23, 42, 0.18));
}

.graph-node-model .graph-node-circle {
    fill: #dcfce7;
}

.graph-node-document .graph-node-circle {
    fill: #fef3c7;
}

.graph-node-facet .graph-node-circle {
    fill: #ede9fe;
}

.graph-node-pipeline .graph-node-circle {
    fill: #cffafe;
}

.graph-node-label {
    fill: #0f172a;
    font-size: 12px;
    font-weight: 700;
    text-anchor: middle;
}

.analysis-graph-panel {
    position: sticky;
    top: 18px;
    padding: 18px;
}

.panel-pin {
    display: inline-flex;
    margin-bottom: 10px;
    padding: 4px 8px;
    border-radius: 999px;
    background: #eef2ff;
    color: #3730a3;
    font-size: 0.8rem;
    font-weight: 700;
}

@media (max-width: 980px) {
    .analysis-graph-layout {
        grid-template-columns: 1fr;
    }

    .analysis-graph-panel {
        position: static;
    }
}