:root {
    --navy: #14253d;
    --blue: #2563eb;
    --blue-dark: #1d4ed8;
    --blue-light: #eff6ff;
    --text: #1f2937;
    --muted: #667085;
    --border: #dce3ec;
    --background: #f5f7fa;
    --white: #ffffff;
    --green: #16a34a;
    --green-light: #dcfce7;
    --amber: #d97706;
    --amber-light: #fff7ed;
    --red: #dc2626;
    --red-light: #fef2f2;
}

* {
    box-sizing: border-box;
}

[hidden] {
    display: none !important;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--text);
    background: var(--background);
    font-family:
        Inter, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC",
        -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
    line-height: 1.6;
}

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

.container {
    width: min(1180px, calc(100% - 40px));
    margin: 0 auto;
}

.hero {
    padding: 64px 0 48px;
    background:
        linear-gradient(
            135deg,
            #ffffff 0%,
            #eef5ff 100%
        );
    border-bottom: 1px solid var(--border);
}

.eyebrow,
.step-label {
    margin: 0 0 10px;
    color: var(--blue);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.12em;
}

h1,
h2,
p {
    margin-top: 0;
}

h1 {
    max-width: 850px;
    margin-bottom: 16px;
    color: var(--navy);
    font-size: clamp(36px, 5vw, 58px);
    line-height: 1.1;
}

h2 {
    margin-bottom: 8px;
    color: var(--navy);
    font-size: 24px;
}

.hero-description {
    max-width: 780px;
    color: var(--muted);
    font-size: 18px;
}

.status-line {
    display: flex;
    align-items: center;
    gap: 9px;
    color: var(--muted);
    font-size: 14px;
}

.status-dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: #94a3b8;
}

.status-dot.connected {
    background: var(--green);
}

.workspace {
    display: grid;
    grid-template-columns:
        minmax(0, 1.5fr)
        minmax(300px, 0.8fr);
    gap: 24px;
    padding-top: 36px;
    padding-bottom: 48px;
}

.panel {
    padding: 28px;
    overflow: hidden;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 16px;
    box-shadow:
        0 8px 24px
        rgba(20, 37, 61, 0.05);
}

.section-heading > p:last-child,
.panel-introduction {
    color: var(--muted);
}

form {
    display: grid;
    gap: 10px;
    margin-top: 26px;
}

label {
    margin-top: 8px;
    color: var(--navy);
    font-size: 14px;
    font-weight: 650;
}

textarea,
input,
select {
    width: 100%;
    padding: 13px 14px;
    color: var(--text);
    background: var(--white);
    border: 1px solid #cbd5e1;
    border-radius: 9px;
    font: inherit;
}

textarea {
    resize: vertical;
}

textarea:focus,
input:focus,
select:focus {
    outline:
        3px solid
        rgba(37, 99, 235, 0.13);
    border-color: var(--blue);
}

button {
    margin-top: 18px;
    padding: 14px 20px;
    color: var(--white);
    background: var(--blue);
    border: 0;
    border-radius: 9px;
    font: inherit;
    font-weight: 700;
    cursor: pointer;
}

button:hover {
    background: var(--blue-dark);
}

button:disabled {
    cursor: wait;
    opacity: 0.65;
}

.run-message {
    min-height: 24px;
    margin: 4px 0 0;
    color: var(--muted);
    font-size: 14px;
}

.workflow-list {
    display: grid;
    gap: 20px;
    padding: 0;
    margin: 28px 0 0;
    list-style: none;
}

.workflow-list li {
    display: grid;
    grid-template-columns: 36px 1fr;
    gap: 12px;
}

.workflow-list li > span {
    display: grid;
    width: 32px;
    height: 32px;
    place-items: center;
    color: var(--blue);
    background: var(--blue-light);
    border-radius: 50%;
    font-weight: 700;
}

.workflow-list strong {
    color: var(--navy);
}

.workflow-list p {
    margin-bottom: 0;
    color: var(--muted);
    font-size: 14px;
}

.result-panel,
.evidence-panel,
.decision-panel,
.error-panel {
    grid-column: 1 / -1;
}

.result-panel {
    border-left: 4px solid var(--green);
}

.evidence-panel {
    border-left: 4px solid var(--amber);
}

.decision-panel {
    border-left: 4px solid var(--blue);
}

.error-panel {
    color: #991b1b;
    background: var(--red-light);
    border-left: 4px solid var(--red);
}

.error-panel h2 {
    color: #991b1b;
}

.error-panel p:last-child {
    margin-bottom: 0;
}

.result-heading {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 24px;
}

.result-badge,
.neutral-badge,
.confidence-badge {
    display: inline-block;
    flex-shrink: 0;
    padding: 6px 10px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 700;
}

.result-badge {
    color: #166534;
    background: var(--green-light);
}

.neutral-badge {
    color: #334155;
    background: #e2e8f0;
}

.confidence-badge {
    color: #334155;
    background: #e2e8f0;
    text-transform: capitalize;
}

.confidence-high {
    color: #166534;
    background: var(--green-light);
}

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

.confidence-low {
    color: #991b1b;
    background: #fee2e2;
}

.result-summary {
    display: grid;
    grid-template-columns:
        2fr 1.5fr 0.8fr;
    gap: 16px;
    margin-bottom: 16px;
}

.result-columns {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.full-width-block {
    grid-column: 1 / -1;
}

.result-block {
    padding: 20px;
    background: #f8fafc;
    border: 1px solid var(--border);
    border-radius: 12px;
}

.result-block h3,
.brief-section h3,
.brief-highlight h3,
.evidence-card h3 {
    margin: 0 0 10px;
    color: var(--navy);
    font-size: 15px;
}

.result-block p {
    margin-bottom: 0;
    color: var(--muted);
}

.result-block ol,
.result-block ul {
    padding-left: 22px;
    margin: 0;
}

.result-block li {
    padding: 5px 0;
    color: var(--muted);
}

.query-list {
    display: grid;
    grid-template-columns:
        repeat(2, minmax(0, 1fr));
    gap: 6px 28px;
}

.panel-introduction {
    max-width: 760px;
    margin-bottom: 24px;
}

.evidence-list {
    display: grid;
    grid-template-columns:
        repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.evidence-card {
    min-width: 0;
    padding: 20px;
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: 12px;
}

.evidence-card-header {
    display: grid;
    grid-template-columns: auto 1fr;
    align-items: start;
    gap: 10px;
    margin-bottom: 14px;
}

.source-id {
    display: inline-grid;
    min-width: 36px;
    height: 28px;
    padding: 0 8px;
    place-items: center;
    color: var(--white);
    background: var(--navy);
    border-radius: 7px;
    font-size: 12px;
    font-weight: 700;
}

.source-link {
    overflow-wrap: anywhere;
    color: var(--navy);
    font-weight: 700;
    line-height: 1.4;
    text-decoration: none;
}

.source-link[href]:hover {
    color: var(--blue);
    text-decoration: underline;
}

.evidence-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
    margin-bottom: 13px;
}

.evidence-tag {
    padding: 4px 8px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 700;
    text-transform: capitalize;
}

.neutral-tag {
    color: #334155;
    background: #e2e8f0;
}

.quality-high,
.relevance-high {
    color: #166534;
    background: var(--green-light);
}

.quality-medium,
.relevance-medium {
    color: #92400e;
    background: #fef3c7;
}

.quality-low,
.relevance-low {
    color: #991b1b;
    background: #fee2e2;
}

.evidence-query {
    margin-bottom: 16px;
    color: var(--muted);
    font-size: 12px;
}

.evidence-claim {
    margin-bottom: 18px;
    color: var(--text);
}

.evidence-limitations {
    margin-bottom: 0;
    color: var(--muted);
    font-size: 14px;
}

.empty-message {
    grid-column: 1 / -1;
    margin: 0;
    padding: 20px;
    color: var(--muted);
    background: #f8fafc;
    border: 1px dashed #cbd5e1;
    border-radius: 12px;
}

.brief-highlight {
    padding: 22px;
    margin-bottom: 16px;
    background: var(--blue-light);
    border: 1px solid #bfdbfe;
    border-radius: 12px;
}

.brief-highlight p {
    margin-bottom: 0;
    color: #334155;
    font-size: 17px;
}

.recommendation-block {
    padding: 22px;
    margin-bottom: 24px;
    color: var(--white);
    background:
        linear-gradient(
            135deg,
            var(--navy),
            #233e63
        );
    border-radius: 12px;
}

.recommendation-label {
    margin-bottom: 7px;
    color: #93c5fd;
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.12em;
}

.recommendation-block p:last-child {
    margin-bottom: 0;
    font-size: 18px;
    font-weight: 650;
}

.brief-section {
    margin-bottom: 24px;
}

.findings-list {
    display: grid;
    gap: 12px;
    padding-left: 24px;
    margin: 0;
}

.finding-item {
    padding: 16px 18px;
    background: #f8fafc;
    border: 1px solid var(--border);
    border-radius: 10px;
}

.finding-item p {
    margin-bottom: 9px;
}

.finding-citations {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
    color: var(--muted);
    font-size: 12px;
}

.citation-chip {
    display: inline-block;
    padding: 3px 8px;
    color: var(--blue);
    background: var(--blue-light);
    border-radius: 999px;
    font-weight: 700;
    text-decoration: none;
}

a.citation-chip:hover {
    background: #dbeafe;
    text-decoration: underline;
}

.brief-grid {
    display: grid;
    grid-template-columns:
        repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.brief-grid .result-block {
    height: 100%;
}

footer {
    padding: 24px 0 36px;
    color: var(--muted);
    border-top: 1px solid var(--border);
    font-size: 13px;
}

@media (max-width: 960px) {
    .brief-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 820px) {
    .container {
        width: min(
            100% - 24px,
            1180px
        );
    }

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

    .hero {
        padding-top: 42px;
    }

    .panel {
        padding: 22px;
    }

    .result-heading {
        display: block;
    }

    .result-badge,
    .neutral-badge,
    .confidence-badge {
        margin-top: 8px;
    }

    .result-summary,
    .result-columns,
    .query-list,
    .evidence-list {
        grid-template-columns: 1fr;
    }

    .full-width-block {
        grid-column: auto;
    }
}