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

html, body {
    scrollbar-width: none;
    -ms-overflow-style: none;
}

html::-webkit-scrollbar,
body::-webkit-scrollbar {
    display: none;
}

:root {
    --bg: #ffffff;
    --bg-secondary: #f5f5f5;
    --text: #000000;
    --text-secondary: #666666;
    --border: #e0e0e0;
    --safe: #00a86b;
    --safe-bg: #e8f5e9;
    --danger: #dc2626;
    --danger-bg: #fef2f2;
    --accent: #000000;
}

/*
 * DESIGN SYSTEM REFERENCE
 * ───────────────────────────────────────────────
 *
 * Typography:
 *   Label:   10px / 600 / 0.15em / uppercase / --text-secondary
 *   Button:  11px / 600 / 0.1em  / uppercase
 *   Body:    12-13px / 400 / --text or --text-secondary
 *   Mono:    'SF Mono', 'Monaco', 'Inconsolata', monospace
 *   Heading: 16-28px / 700
 *
 * Spacing:  8, 12, 16, 20, 24, 32, 40, 48px
 * Borders:  1px solid var(--border)
 * Accents:  border-left 3-4px solid var(--safe | --danger | --accent)
 *
 * Color modifiers (add to element):
 *   .safe    → green state (--safe, --safe-bg)
 *   .danger  → red state   (--danger, --danger-bg)
 *
 * Reusable components:
 *   .btn              filled button
 *   .btn-secondary    ghost button (use with .btn)
 *   .btn-outline      standalone outline link/button
 *   .tabs / .tab      tab navigation (nest for sub-tabs)
 *   .tab-count        badge inside .tab
 *   .tab-content      tab panel (add .active)
 *   .section-title    section header label with border
 *   .status-banner    verdict banner (add .safe/.danger)
 *   .model-card       prediction card (add .safe/.danger)
 *   .prob-bar/.prob-fill   4px progress bar (add .safe/.danger to fill)
 *   .feature-item     key-value pair row
 *   .features-grid    auto-fill grid for feature items
 *   .models-grid      auto-fit grid for cards
 *   .error-notice     error message block
 */

body {
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.4;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 24px;
}

/* HEADER */
header {
    padding: 48px 0 40px;
    border-bottom: 1px solid var(--border);
}

.logo {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: 4px;
}

.tagline {
    font-size: 11px;
    color: var(--text-secondary);
    letter-spacing: 0.05em;
}

/* INPUT SECTION */
.input-section {
    padding: 48px 0;
    border-bottom: 1px solid var(--border);
}

.input-label {
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 12px;
    display: block;
}

.input-wrapper {
    display: flex;
    gap: 0;
    margin-bottom: 16px;
}

input[type="text"] {
    flex: 1;
    padding: 16px 20px;
    border: 1px solid var(--border);
    border-right: none;
    font-size: 14px;
    font-family: inherit;
    background: var(--bg);
    color: var(--text);
    outline: none;
    transition: border-color 0.2s;
}

input[type="text"]:focus {
    border-color: var(--text);
}

input[type="text"]::placeholder {
    color: #999;
}

.btn {
    padding: 16px 32px;
    border: 1px solid var(--text);
    background: var(--text);
    color: var(--bg);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    cursor: pointer;
    font-family: inherit;
    transition: all 0.2s;
    white-space: nowrap;
}

.btn:hover {
    background: #333;
}

.btn:active {
    transform: scale(0.98);
}

.btn-group {
    display: flex;
    gap: 8px;
}

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

.btn-secondary:hover {
    background: var(--bg-secondary);
}

/* OUTLINE BUTTON — standalone outline link or button */
.btn-outline,
.learn-more-btn,
.show-more-btn,
.back-link {
    display: inline-block;
    padding: 10px 20px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    text-decoration: none;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-outline:hover,
.learn-more-btn:hover,
.show-more-btn:hover,
.back-link:hover {
    border-color: var(--text);
    background: var(--bg-secondary);
}

/* LOADING */
.loading {
    display: none;
    padding: 80px 0;
    text-align: center;
}

.loading-bar {
    width: 48px;
    height: 2px;
    background: var(--border);
    margin: 0 auto 16px;
    position: relative;
    overflow: hidden;
}

.loading-bar::after {
    content: '';
    position: absolute;
    left: -50%;
    width: 50%;
    height: 100%;
    background: var(--text);
    animation: loading 1s ease-in-out infinite;
}

@keyframes loading {
    0% { left: -50%; }
    100% { left: 100%; }
}

.loading-text {
    font-size: 10px;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-secondary);
}

/* RESULTS */
.results {
    display: none;
    padding: 48px 0;
}

/* STATUS BANNER */
.status-banner {
    padding: 32px;
    margin-bottom: 32px;
    text-align: center;
}

.status-banner.safe {
    background: var(--safe-bg);
    border-left: 4px solid var(--safe);
}

.status-banner.danger {
    background: var(--danger-bg);
    border-left: 4px solid var(--danger);
}

.status-icon {
    font-size: 30px;
    line-height: 1;
}

.status-banner.safe .status-icon {
    color: var(--safe);
}

.status-banner.danger .status-icon {
    color: var(--danger);
}

.status-title {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.status-banner.safe .status-title {
    color: var(--safe);
}

.status-banner.danger .status-title {
    color: var(--danger);
}

.status-subtitle {
    font-size: 11px;
    color: var(--text-secondary);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-top: 4px;
}

/* ENSEMBLE SCORE */
.ensemble-score {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 4px;
    margin: 4px;
}

.status-banner.safe .model-confidence {
    color: var(--safe);
}

.status-banner.danger .model-confidence {
    color: var(--danger);
}

.ensemble-bar {
    width: 100%;
    max-width: 360px;
    height: 4px;
    background: var(--border);
    margin: 10px auto 8px;
}

/* ensemble-bar uses .prob-fill for the fill element */

.status-kicker {
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.status-headline {
    display: inline-flex;
    align-items: center;
    gap: 12px;
}

.status-headline > div:last-child {
    text-align: left;
}

.banner-score-label {
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-secondary);
}

.banner-score-value {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.04em;
}

.status-banner.safe .banner-score-value {
    color: var(--safe);
}

.status-banner.danger .banner-score-value {
    color: var(--danger);
}

.banner-score-note {
    font-size: 10px;
    color: var(--text-secondary);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.status-votes {
    font-size: 10px;
    color: var(--text-secondary);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

/* URL DISPLAY */
.url-display {
    padding: 16px 20px;
    background: var(--bg-secondary);
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
    font-size: 13px;
    word-break: break-all;
    margin-bottom: 32px;
    border-left: 2px solid var(--border);
}

/* SECTION TITLES */
.section-title {
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
}

/* TABS */
.tabs {
    display: flex;
    gap: 0;
    margin-bottom: 32px;
    border-bottom: 1px solid var(--border);
}

.tab {
    padding: 12px 24px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.2s;
    font-family: inherit;
    margin-bottom: -1px;
}

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

.tab.active {
    color: var(--text);
    border-bottom-color: var(--text);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* MODEL CARDS */
.models-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
    margin-bottom: 40px;
}

.model-card {
    padding: 24px;
    border: 1px solid var(--border);
    background: var(--bg);
}

.model-card.safe {
    border-left: 3px solid var(--safe);
}

.model-card.danger {
    border-left: 3px solid var(--danger);
}

.model-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 16px;
}

.model-name {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.model-prediction {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    padding: 4px 8px;
}

.model-prediction.safe {
    color: var(--safe);
    background: var(--safe-bg);
}

.model-prediction.danger {
    color: var(--danger);
    background: var(--danger-bg);
}

.model-confidence {
    font-size: 10px;
    font-weight: 700;
    margin-bottom: 8px;
}

.model-confidence-label {
    font-size: 10px;
    color: var(--text-secondary);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

/* PROBABILITY BAR */
.prob-container {
    margin-top: 16px;
}

.prob-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
}

.prob-label {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    width: 70px;
    color: var(--text-secondary);
}

.prob-bar {
    flex: 1;
    height: 4px;
    background: var(--bg-secondary);
    position: relative;
}

.prob-fill {
    height: 100%;
    transition: width 0.5s ease;
}

.prob-fill.safe {
    background: var(--safe);
}

.prob-fill.danger {
    background: var(--danger);
}

.prob-value {
    font-size: 11px;
    font-weight: 600;
    width: 45px;
    text-align: right;
}

/* FEATURES GRID */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 8px;
    margin-bottom: 32px;
}

.feature-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border-left: 2px solid var(--border);
    font-size: 12px;
    transition: border-color 0.2s;
}

.feature-item:hover {
    border-left-color: var(--text);
}

.feature-item.highlight-safe {
    border-left-color: var(--safe);
    background: var(--safe-bg);
}

.feature-item.highlight-danger {
    border-left-color: var(--danger);
    background: var(--danger-bg);
}

.feature-label {
    color: var(--text-secondary);
    font-size: 11px;
}

.feature-value {
    font-weight: 600;
    font-family: 'SF Mono', 'Monaco', monospace;
    font-size: 12px;
}

.feature-value.true {
    color: var(--safe);
}

.feature-value.false {
    color: var(--danger);
}

.show-more-btn  { width: 100%; margin-top: 16px; }

[id^="hiddenFeatures-"] {
    display: contents;
}

[id^="hiddenFeatures-"].features-hidden {
    display: none;
}

/* FOOTER */
footer {
    padding: 32px 0;
    border-top: 1px solid var(--border);
    text-align: center;
}

.footer-text {
    font-size: 10px;
    color: var(--text-secondary);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.learn-more-btn { margin-top: 16px; padding: 12px 28px; }

/* TAB COUNT BADGE */
.tab-count {
    display: inline-block;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    font-size: 10px;
    font-weight: 700;
    padding: 1px 6px;
    margin-left: 4px;
    vertical-align: middle;
}

.tab.active .tab-count {
    background: var(--text);
    color: var(--bg);
    border-color: var(--text);
}



/* FEATURE SPLIT BAR */
.feature-split {
    margin-top: 16px;
}

.feature-split-bar {
    display: flex;
    height: 32px;
    overflow: hidden;
    border: 1px solid var(--border);
}

.split-url {
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    border-right: 1px solid var(--border);
}

.split-html {
    background: var(--text);
    color: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

/* COMBINED FEATURES TABS */
.combined-features-tabs {
    margin-top: 32px;
}

/* ERROR NOTICE */
.error-notice {
    font-size: 12px;
    color: var(--danger);
    padding: 16px 20px;
    background: var(--danger-bg);
    border-left: 2px solid var(--danger);
    margin: 16px 0;
}

/* AI EXPLANATION */
.ai-explanation {
    margin-bottom: 32px;
    padding: 24px 28px;
    border: 1px solid var(--border);
    background: var(--bg);
}

.ai-explanation.safe {
    border-left: 3px solid var(--safe);
}

.ai-explanation.danger {
    border-left: 3px solid var(--danger);
}

.ai-explanation .section-title {
    margin-bottom: 12px;
}

.ai-explanation-body {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text);
}

.ai-text {
    margin: 0;
    white-space: pre-wrap;
}

.ai-error {
    color: var(--danger);
}

/* Blinking cursor while streaming */
.ai-cursor {
    display: inline-block;
    width: 2px;
    height: 1em;
    background: var(--text);
    margin-left: 2px;
    vertical-align: text-bottom;
    animation: blink-cursor 0.8s step-end infinite;
}

@keyframes blink-cursor {
    0%, 100% { opacity: 1; }
    50%      { opacity: 0; }
}

/* Streaming progress bar at top of explanation */
.ai-stream-bar {
    height: 2px;
    background: var(--border);
    margin-bottom: 14px;
    position: relative;
    overflow: hidden;
}

.ai-stream-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 40%;
    height: 100%;
    background: var(--text);
    animation: stream-slide 1.2s ease-in-out infinite;
}

@keyframes stream-slide {
    0%   { left: -40%; }
    100% { left: 100%; }
}

/* Initial loading state (before stream starts) */
.ai-loading {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 10px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-secondary);
}

.ai-loading .loading-bar {
    width: 32px;
    height: 2px;
    background: var(--border);
    position: relative;
    overflow: hidden;
    flex-shrink: 0;
}

.ai-loading .loading-bar::after {
    content: '';
    position: absolute;
    left: -50%;
    width: 50%;
    height: 100%;
    background: var(--text);
    animation: loading 1s ease-in-out infinite;
}

/* RESPONSIVE */
@media (max-width: 640px) {
    .container {
        padding: 0 16px;
    }

    header {
        padding: 24px 0;
    }
    
    .input-section {
        padding: 24px 0;
    }
    
    .input-wrapper {
        flex-direction: column;
    }
    
    input[type="text"] {
        border-right: 1px solid var(--border);
        border-bottom: none;
    }
    
    .btn {
        width: 100%;
    }
    
    .btn-group {
        flex-direction: column;
    }
    
    .models-grid {
        grid-template-columns: 1fr;
    }
    
    .status-title {
        font-size: 22px;
    }

    .status-headline {
        gap: 10px;
    }

    .status-icon {
        font-size: 26px;
    }

    .banner-score-value {
        font-size: 14px;
    }

    /* TABS: horizontal scroll on mobile */
    .tabs {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        -ms-overflow-style: none;
        margin-bottom: 24px;
    }

    .tabs::-webkit-scrollbar {
        display: none;
    }

    .tab {
        padding: 10px 14px;
        font-size: 10px;
        white-space: nowrap;
        flex-shrink: 0;
    }

    /* AI explanation box */
    .ai-explanation {
        padding: 16px 18px;
    }

    .ai-explanation-body {
        font-size: 13px;
    }

    /* Status banner */
    .status-banner {
        padding: 24px 16px;
    }

    /* Features grid on results page */
    .features-grid {
        grid-template-columns: 1fr;
    }

    .results {
        padding: 32px 0;
    }

    .url-display {
        font-size: 12px;
        padding: 12px 16px;
    }
}

/* =============================================
   MODELS PAGE
   ============================================= */

/* MODELS PAGE - HEADER */
.models-page header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
}

.header-left {
    display: flex;
    flex-direction: column;
}

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

.logo a:hover {
    opacity: 0.7;
}

.back-link      { padding: 8px 16px; }

/* PAGE TITLE */
.page-title-section {
    padding: 48px 0;
    border-bottom: 1px solid var(--border);
}

.page-title {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: 0.02em;
    margin-bottom: 8px;
}

.page-description {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
    max-width: 640px;
}

/* SECTION */
.section {
    padding: 40px 0;
    border-bottom: 1px solid var(--border);
}

.section:last-child {
    border-bottom: none;
}

.section-subtitle {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.5;
}

/* COMPARISON TABLE */
.comparison-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
    margin-bottom: 24px;
}

.comparison-table th {
    text-align: left;
    padding: 12px 16px;
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-secondary);
    border-bottom: 2px solid var(--border);
    white-space: nowrap;
}

.comparison-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
}

.comparison-table tr:hover td {
    background: var(--bg-secondary);
}

.comparison-table .model-name-cell {
    font-weight: 600;
    font-size: 12px;
}

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

/* METRIC CARDS */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 16px;
    margin-bottom: 32px;
}

.metric-card {
    padding: 20px;
    border: 1px solid var(--border);
    text-align: center;
}

.metric-value {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 4px;
}

.metric-label {
    font-size: 10px;
    color: var(--text-secondary);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.metric-value.highlight {
    color: var(--safe);
}

/* MODEL DETAIL CARDS */
.model-detail {
    margin-bottom: 40px;
    padding: 32px;
    border: 1px solid var(--border);
    border-left: 3px solid var(--accent);
}

.model-detail-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 12px;
}

.model-detail-name {
    font-size: 16px;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.model-detail-type {
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-secondary);
    padding: 4px 10px;
    border: 1px solid var(--border);
}

/* CONFUSION MATRIX */
.confusion-matrix {
    display: inline-grid;
    grid-template-columns: auto auto auto;
    gap: 0;
    margin: 16px 0;
    font-size: 13px;
}

.cm-header {
    padding: 8px 20px;
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-secondary);
    text-align: center;
}

.cm-cell {
    padding: 16px 24px;
    text-align: center;
    font-weight: 700;
    font-size: 14px;
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
    border: 1px solid var(--border);
}

.cm-tp { background: var(--safe-bg); color: var(--safe); }
.cm-tn { background: var(--safe-bg); color: var(--safe); }
.cm-fp { background: var(--danger-bg); color: var(--danger); }
.cm-fn { background: var(--danger-bg); color: var(--danger); }

.cm-label {
    padding: 8px 16px;
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* FEATURES LIST */
.features-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 4px;
    margin-top: 16px;
}

.feature-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 16px;
    background: var(--bg-secondary);
    font-size: 12px;
}

.feature-row:nth-child(even) {
    background: var(--bg);
}

.feature-rank {
    font-size: 10px;
    color: var(--text-secondary);
    font-weight: 600;
    width: 24px;
    flex-shrink: 0;
}

.feature-name {
    flex: 1;
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
    font-size: 11px;
}

.feature-importance {
    font-weight: 700;
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
    font-size: 11px;
    text-align: right;
    width: 70px;
    flex-shrink: 0;
}

.importance-bar-bg {
    flex: 1;
    max-width: 120px;
    height: 4px;
    background: var(--border);
    margin: 0 12px;
    flex-shrink: 0;
}

.importance-bar-fill {
    height: 100%;
    background: var(--text);
}

/* HYPERPARAMS */
.params-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 8px;
}

.param-item {
    display: flex;
    justify-content: space-between;
    padding: 10px 16px;
    background: var(--bg-secondary);
    font-size: 12px;
}

.param-key {
    color: var(--text-secondary);
    font-size: 11px;
}

.param-value {
    font-weight: 600;
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
    font-size: 11px;
}

/* PIPELINE DIAGRAM */
.pipeline {
    display: flex;
    margin: 24px 0;
    counter-reset: step;
}

.pipeline-step {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-right: none;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    background: var(--bg);
    position: relative;
}

.pipeline-step:last-child { border-right: 1px solid var(--border); }

/* Arrow connector between steps */
.pipeline-step:not(:last-child)::after {
    content: '\2192';
    position: absolute;
    right: -4px;
    top: 50%;
    transform: translate(50%, -50%);
    font-size: 11px;
    color: var(--text-secondary);
    background: var(--bg);
    z-index: 1;
    padding: 2px 0;
    line-height: 1;
}

.pipeline-step .step-number {
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--text);
    color: var(--bg);
    font-size: 11px;
    font-weight: 700;
    flex-shrink: 0;
    line-height: 1;
}

/* COLLAPSIBLE TOGGLE */
.collapsible-toggle {
    cursor: pointer;
    display: flex;
    align-items: center;
    user-select: none;
}

.collapsible-toggle:hover {
    color: var(--text);
}

.toggle-icon {
    margin-left: auto;
    font-size: 16px;
    font-weight: 400;
    color: var(--text-secondary);
    transition: transform 0.2s;
    flex-shrink: 0;
    width: 20px;
    text-align: center;
    line-height: 1;
}

.collapsible-content {
    display: none;
    padding-top: 8px;
}

.collapsible-content.open {
    display: block;
}

/* FEATURE GRID */
.feature-count {
    font-weight: 400;
    color: var(--text-secondary);
    letter-spacing: 0.05em;
    margin-left: 8px;
}

.feature-category-label {
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.04em;
    margin: 24px 0 10px;
    color: var(--text);
}

.feature-category-label:first-of-type {
    margin-top: 0;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 6px;
}

.feature-chip {
    position: relative;
    padding: 8px 12px;
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
    font-size: 11px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    cursor: default;
    transition: all 0.15s;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.feature-chip:hover {
    border-color: var(--text);
    background: var(--bg);
    overflow: visible;
}

.feature-chip:hover::after {
    content: attr(data-tip);
    position: absolute;
    bottom: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%);
    padding: 12px 16px;
    background: var(--text);
    color: var(--bg);
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    font-size: 12px;
    line-height: 1.5;
    white-space: normal;
    width: max-content;
    max-width: 300px;
    z-index: 1000;
    pointer-events: none;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.feature-chip:hover::before {
    content: '';
    position: absolute;
    bottom: calc(100% + 4px);
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: var(--text);
    z-index: 1000;
    pointer-events: none;
}

/* SUBSECTION SPACER */
.subsection {
    margin-top: 24px;
}

/* TABLE SCROLL WRAPPER */
.table-scroll {
    overflow-x: auto;
    margin-bottom: 32px;
}

/* INSIGHT CARDS (comparison tab) */
.insights-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
}

.insight-card {
    padding: 20px;
    border: 1px solid var(--border);
}

.insight-card.insight-safe  { border-left: 3px solid var(--safe); }
.insight-card.insight-accent { border-left: 3px solid var(--accent); }
.insight-card.insight-warning { border-left: 3px solid #f59e0b; }

.insight-label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 8px;
}

.insight-title {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 4px;
}

.insight-desc {
    font-size: 12px;
    color: var(--text-secondary);
}

/* MODELS PAGE RESPONSIVE */
@media (max-width: 640px) {
    .models-page header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .page-title-section {
        padding: 32px 0;
    }

    .page-title {
        font-size: 22px;
    }

    .page-description {
        font-size: 12px;
    }

    .section {
        padding: 28px 0;
    }

    .comparison-table {
        font-size: 11px;
    }

    .comparison-table th,
    .comparison-table td {
        padding: 8px 10px;
    }

    .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .metric-card {
        padding: 14px;
    }

    .metric-value {
        font-size: 22px;
    }

    .model-detail {
        padding: 18px;
    }

    .model-detail-name {
        font-size: 14px;
    }

    .pipeline {
        flex-wrap: wrap;
    }

    .pipeline-step {
        flex: 1 1 40%;
        border-right: 1px solid var(--border);
        margin: -0.5px;
        font-size: 10px;
        padding: 8px 10px;
    }

    .pipeline-step:not(:last-child)::after { display: none; }

    .confusion-matrix {
        font-size: 11px;
    }

    .cm-cell {
        padding: 10px 14px;
        font-size: 12px;
    }

    .cm-header {
        padding: 6px 10px;
    }

    .cm-label {
        padding: 6px 10px;
    }

    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .feature-chip {
        padding: 6px 8px;
        font-size: 10px;
    }

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

    .features-list .feature-row {
        padding: 8px 12px;
    }

    .importance-bar-bg {
        max-width: 80px;
        margin: 0 8px;
    }

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

    .insight-title {
        font-size: 14px;
    }

    .feature-split-bar {
        height: 28px;
    }

    /* Section title / subtitle */
    .section-title {
        font-size: 9px;
    }

    .section-subtitle {
        font-size: 12px;
    }
}