:root {
    --bg: #f8f9fc;
    --bg-subtle: #eef1f6;
    --surface: #ffffff;
    --surface-hover: #f1f4f9;
    --border: #e2e6ee;
    --border-focus: #c98bdb;
    --text: #1e2330;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --primary: #c98bdb;
    --primary-light: #d9a8e8;
    --primary-bg: rgba(201, 139, 219, 0.1);
    --primary-border: rgba(201, 139, 219, 0.25);
    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.08);
    --success-border: rgba(16, 185, 129, 0.2);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.08);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.06);
    --danger-border: rgba(239, 68, 68, 0.2);
    --purple: #a855f7;
    --purple-bg: rgba(168, 85, 247, 0.08);
    --purple-border: rgba(168, 85, 247, 0.2);
    --radius: 12px;
    --radius-sm: 8px;
    --radius-pill: 9999px;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06), 0 1px 4px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.08);
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Outfit', var(--font-sans);
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-sans);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* ── Header ── */
.page-header {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 1.5rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.logo-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: var(--radius-sm);
    display: grid;
    place-items: center;
    color: #fff;
    flex-shrink: 0;
}

.logo-text {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.02em;
}

.logo-tag {
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--primary);
    background: var(--primary-bg);
    border: 1px solid var(--primary-border);
    padding: 0.15rem 0.5rem;
    border-radius: var(--radius-pill);
    letter-spacing: 0.02em;
}

/* ── Index Switcher ── */
.index-switcher {
    display: flex;
    background: var(--bg-subtle);
    border-radius: var(--radius-sm);
    padding: 3px;
    gap: 2px;
}

.index-switcher input[type="radio"] { display: none; }

.index-switcher label {
    padding: 0.5rem 1.25rem;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition);
    margin-bottom: 0;
    white-space: nowrap;
}

.index-switcher label:hover {
    color: var(--text);
    background: rgba(255, 255, 255, 0.6);
}

.index-switcher input[type="radio"]:checked + label {
    background: var(--surface);
    color: var(--primary);
    font-weight: 600;
    box-shadow: var(--shadow-sm);
}

/* ── Layout ── */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    display: grid;
    grid-template-columns: 1.3fr 0.7fr;
    gap: 1.5rem;
    align-items: start;
}

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

/* ── Cards ── */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.75rem;
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition);
    animation: slideUp 0.4s ease-out both;
}

.card + .card { margin-top: 1.5rem; }

.card-title {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 1.25rem;
}

.card-title svg {
    color: var(--primary);
    flex-shrink: 0;
}

/* ── Form Controls ── */
.form-group { margin-bottom: 1.25rem; }

label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.query-input {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--surface);
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    transition: all var(--transition);
}

.query-input::placeholder { color: var(--text-muted); }

.query-input:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px var(--primary-bg);
}

.controls-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
    margin-bottom: 1.25rem;
}

@media (max-width: 600px) {
    .controls-row { grid-template-columns: 1fr; }
}

.range-wrap {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    flex-grow: 1;
    height: 4px;
    background: var(--bg-subtle);
    border-radius: 2px;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    border: 3px solid var(--surface);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition);
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}

.range-val {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--primary);
    background: var(--primary-bg);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    min-width: 2.5rem;
    text-align: center;
}

/* ── Buttons ── */
.btn-primary {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}

.btn-primary:hover {
    background: #b56fcf;
    box-shadow: 0 4px 12px rgba(201, 139, 219, 0.3);
    transform: translateY(-1px);
}

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

.btn-eval {
    background: var(--purple);
}

.btn-eval:hover {
    background: #9333ea;
    box-shadow: 0 4px 12px rgba(168, 85, 247, 0.3);
}

/* ── Spinner ── */
.spinner {
    display: none;
    width: 24px;
    height: 24px;
    border: 2.5px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
    margin: 1.25rem auto 0;
}

/* ── Results ── */
.results-wrapper { display: none; }

.latency-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.4rem 0.9rem;
    background: var(--success-bg);
    border: 1px solid var(--success-border);
    color: var(--success);
    border-radius: var(--radius-pill);
    font-size: 0.82rem;
    font-weight: 500;
    margin-bottom: 1rem;
    animation: fadeIn 0.3s ease-out;
}

.match-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    margin-bottom: 1rem;
    animation: slideUp 0.4s ease-out both;
    transition: box-shadow var(--transition);
}

.match-card:hover { box-shadow: var(--shadow-md); }

.match-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.badge-row { display: flex; gap: 0.35rem; flex-wrap: wrap; }

.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.2rem 0.6rem;
    border-radius: var(--radius-pill);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.badge-rank {
    background: var(--bg-subtle);
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

.badge-category {
    background: var(--primary-bg);
    color: var(--primary);
    border: 1px solid var(--primary-border);
}

.badge-id {
    background: var(--success-bg);
    color: #059669;
    border: 1px solid var(--success-border);
}

.score-chip {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 0.25rem 0.65rem;
    border-radius: 6px;
}

.score-high { background: var(--success-bg); color: var(--success); }
.score-medium { background: var(--warning-bg); color: var(--warning); }
.score-low { background: var(--danger-bg); color: var(--danger); }

.result-block {
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--bg-subtle);
}

.result-block:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.result-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    font-weight: 600;
    margin-bottom: 0.35rem;
}

.result-question {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text);
    line-height: 1.4;
}

.matched-text-box {
    margin-top: 0.6rem;
    padding: 0.6rem 0.85rem;
    background: var(--bg-subtle);
    border-radius: 6px;
    border-left: 3px solid var(--primary);
}

.matched-text-box .result-label { margin-bottom: 0.15rem; }

.matched-text {
    font-size: 0.88rem;
    color: var(--text-secondary);
    font-style: italic;
}

.result-answer {
    font-size: 0.92rem;
    color: var(--text);
    line-height: 1.65;
}

.safety-box {
    margin-top: 0.6rem;
    padding: 0.7rem 0.85rem;
    background: var(--danger-bg);
    border-left: 3px solid var(--danger);
    border-radius: 0 6px 6px 0;
    color: #b91c1c;
    font-size: 0.88rem;
}

.source-link {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    color: var(--primary);
    text-decoration: none;
    font-size: 0.85rem;
    margin-right: 0.75rem;
    margin-top: 0.2rem;
    transition: color var(--transition);
}

.source-link:hover { color: #b56fcf; text-decoration: underline; }

/* ── Rejected ── */
.rejected-card {
    display: none;
    text-align: center;
    padding: 1.75rem;
    background: var(--danger-bg);
    border: 1px dashed rgba(239, 68, 68, 0.3);
    border-radius: var(--radius);
    color: #b91c1c;
    animation: fadeIn 0.3s ease-out;
    margin-bottom: 1rem;
}

.rejected-title {
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 0.3rem;
}

.rejected-card p { font-size: 0.88rem; color: #991b1b; }

/* ── API Docs ── */
.api-docs code {
    font-family: var(--font-mono);
    background: var(--bg-subtle);
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    color: var(--primary);
    font-size: 0.82rem;
}

.api-docs pre {
    background: #1e2330;
    padding: 1rem;
    border-radius: var(--radius-sm);
    overflow-x: auto;
    margin: 0.4rem 0 1.25rem 0;
}

.api-docs pre code {
    padding: 0;
    background: none;
    color: #e2e8f0;
    font-size: 0.78rem;
    line-height: 1.6;
}

.endpoint-badge {
    display: inline-block;
    padding: 0.15rem 0.45rem;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 700;
    font-family: var(--font-mono);
    margin-right: 0.4rem;
}

.badge-post {
    background: var(--success-bg);
    color: var(--success);
    border: 1px solid var(--success-border);
}

.badge-get {
    background: var(--primary-bg);
    color: var(--primary);
    border: 1px solid var(--primary-border);
}

.endpoint-block { margin-bottom: 1.25rem; }
.endpoint-block:last-child { margin-bottom: 0; }
.endpoint-desc { color: var(--text-secondary); font-size: 0.85rem; margin-top: 0.2rem; }

/* ── Eval Results ── */
.eval-results-container {
    display: none;
    margin-top: 1.25rem;
    border-top: 1px solid var(--border);
    padding-top: 1rem;
}

.eval-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.3rem 0;
    font-size: 0.88rem;
    color: var(--text);
}

.eval-row span:first-child { color: var(--text-secondary); }
.eval-row strong { font-weight: 600; }

.eval-section-label {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    font-weight: 600;
    margin-top: 0.75rem;
    margin-bottom: 0.25rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--bg-subtle);
}

.eval-section-label:first-child { margin-top: 0; padding-top: 0; border-top: none; }

/* ── Animations ── */
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}