:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a25;
    --bg-card: rgba(26, 26, 37, 0.85);
    --text-primary: #f0f0f5;
    --text-secondary: #a0a0b0;
    --text-muted: #6b6b80;
    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    --border: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(99, 102, 241, 0.3);
    --glow: 0 0 40px rgba(99, 102, 241, 0.3);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    --radius: 16px;
    --radius-sm: 8px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Background Animation */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background:
        radial-gradient(ellipse at 20% 20%, rgba(99, 102, 241, 0.12) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(139, 92, 246, 0.08) 0%, transparent 50%),
        var(--bg-primary);
}

#networkCanvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.4;
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 1rem 2rem;
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-brand:hover {
    color: var(--accent-primary);
}

.nav-title {
    font-weight: 600;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-paper-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    border-radius: var(--radius-sm);
    color: white;
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 600;
    transition: all 0.3s;
    box-shadow: 0 0 15px rgba(239, 68, 68, 0.3);
}

.nav-paper-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 25px rgba(239, 68, 68, 0.5);
}

.nav-badge {
    padding: 0.5rem 1rem;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: var(--radius-sm);
    color: var(--accent-primary);
    font-size: 0.85rem;
    font-weight: 500;
}

.nav-paper {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    transition: all 0.3s;
}

.nav-paper:hover {
    border-color: var(--border-hover);
    color: var(--accent-primary);
}

.nav-badge {
    padding: 0.5rem 1rem;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: var(--radius-sm);
    color: var(--accent-primary);
    font-size: 0.85rem;
    font-weight: 500;
}

/* Hero Section */
.hero {
    padding: 8rem 2rem 3rem;
    text-align: center;
}

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

.hero-badge {
    display: inline-block;
    padding: 0.5rem 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    backdrop-filter: blur(10px);
}

.hero-badge i {
    color: var(--accent-primary);
    margin-right: 0.5rem;
}

.hero h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.hero h1 span {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Section */
.section {
    padding: 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 2rem;
}

.section-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.section-header h2 i {
    color: var(--accent-primary);
}

.section-header p {
    color: var(--text-secondary);
}

/* Model Status */
.status-card {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    max-width: 600px;
    margin: 0 auto;
    backdrop-filter: blur(20px);
}

.status-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.status-icon.loading {
    background: rgba(99, 102, 241, 0.1);
    color: var(--accent-primary);
}

.status-icon.ready {
    background: rgba(34, 197, 94, 0.1);
    color: var(--success);
}

.status-icon.error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

.status-content {
    flex: 1;
}

.status-title {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.status-detail {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.progress-bar {
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--accent-gradient);
    transition: width 0.3s ease;
}

/* Demo Container */
.demo-container {
    display: grid;
    grid-template-columns: 1fr 1.5fr 1fr;
    gap: 1.5rem;
}

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

.panel {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    backdrop-filter: blur(20px);
    overflow: hidden;
}

.panel-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border);
    background: rgba(0, 0, 0, 0.2);
}

.panel-header h3 {
    font-size: 0.95rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.panel-header h3 i {
    color: var(--accent-primary);
}

.panel-content {
    padding: 1.5rem;
}

/* Input Panel */
.input-group {
    margin-bottom: 1.25rem;
}

.input-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.input-group textarea {
    width: 100%;
    min-height: 120px;
    padding: 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9rem;
    resize: vertical;
    transition: border-color 0.3s;
}

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

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

.verify-btn {
    width: 100%;
    padding: 1rem;
    background: var(--accent-gradient);
    border: none;
    border-radius: var(--radius-sm);
    color: white;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all 0.3s;
    box-shadow: var(--glow);
}

.verify-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 0 60px rgba(99, 102, 241, 0.4);
}

.verify-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Graph Visualization */
.graph-container {
    height: 400px;
    position: relative;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

#graphSvg {
    width: 100%;
    height: 100%;
}

.graph-legend {
    position: absolute;
    bottom: 1rem;
    left: 1rem;
    display: flex;
    gap: 1rem;
    font-size: 0.75rem;
    color: var(--text-muted);
}

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

.legend-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.legend-dot.source {
    background: var(--accent-primary);
}

.legend-dot.hypothesis {
    background: var(--accent-secondary);
}

.legend-line {
    width: 20px;
    height: 2px;
    background: rgba(255, 255, 255, 0.3);
}

/* Results Panel */
.result-card {
    text-align: center;
    margin-bottom: 1.5rem;
}

.gauge-container {
    position: relative;
    width: 160px;
    margin: 0 auto 1rem;
}

.gauge {
    width: 100%;
    height: auto;
}

.gauge-bg {
    fill: none;
    stroke: var(--bg-tertiary);
    stroke-width: 12;
    stroke-linecap: round;
}

.gauge-fill {
    fill: none;
    stroke: url(#gaugeGradient);
    stroke-width: 12;
    stroke-linecap: round;
    stroke-dasharray: 251.2;
    stroke-dashoffset: 251.2;
    transition: stroke-dashoffset 0.8s ease-out;
}

.gauge-value {
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 1.75rem;
    font-weight: 700;
    font-family: 'JetBrains Mono', monospace;
}

.gauge-label {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.verdict {
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    display: inline-block;
}

.verdict.pass {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
    color: var(--success);
}

.verdict.fail {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--danger);
}

.verdict.neutral {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    color: var(--text-muted);
}

.verdict-stage {
    display: block;
    font-size: 0.7rem;
    font-weight: 400;
    color: var(--text-muted);
    margin-top: 0.25rem;
    font-family: 'JetBrains Mono', monospace;
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.metric {
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    padding: 0.75rem;
    text-align: center;
}

.metric-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.metric-value {
    font-size: 0.95rem;
    font-weight: 600;
    font-family: 'JetBrains Mono', monospace;
    color: var(--accent-primary);
}

.cost-comparison {
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    padding: 1rem;
}

.cost-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
    text-align: center;
}

.cost-bar {
    display: flex;
    gap: 0.5rem;
}

.cost-rega,
.cost-gpt {
    flex: 1;
    padding: 0.5rem;
    border-radius: 4px;
    text-align: center;
    font-size: 0.8rem;
}

.cost-rega {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.cost-rega span {
    color: var(--success);
}

.cost-rega strong {
    display: block;
    color: var(--success);
    font-size: 1rem;
}

.cost-gpt {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.cost-gpt span {
    color: var(--danger);
}

.cost-gpt strong {
    display: block;
    color: var(--danger);
    font-size: 1rem;
}

/* Explanations (White-box) */
.explanations-container {
    margin-top: 1rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.explanations-header {
    padding: 0.75rem 1rem;
    background: rgba(0, 0, 0, 0.2);
    font-size: 0.85rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
}

.explanations-header i {
    color: var(--warning);
}

.explanations-list {
    padding: 0.75rem;
    max-height: 150px;
    overflow-y: auto;
}

.explanation-placeholder {
    color: var(--text-muted);
    font-size: 0.8rem;
    text-align: center;
    padding: 0.5rem;
}

.explanation-item {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    padding: 0.5rem;
    font-size: 0.8rem;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 4px;
    margin-bottom: 0.5rem;
}

.explanation-item:last-child {
    margin-bottom: 0;
}

.explanation-icon {
    font-size: 1rem;
    flex-shrink: 0;
}

.explanation-text {
    color: var(--text-secondary);
    line-height: 1.4;
}

/* Full-Width Explanations Bar */
.explanations-bar {
    margin-top: 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    backdrop-filter: blur(20px);
    overflow: hidden;
}

.explanations-bar-header {
    padding: 1rem 1.5rem;
    background: rgba(0, 0, 0, 0.2);
    font-size: 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border);
}

.explanations-bar-header i {
    color: var(--warning);
}

.explanations-bar-content {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    padding: 1.25rem;
    min-height: 60px;
}

.explanations-bar-content .explanation-item {
    flex: 1 1 calc(50% - 0.5rem);
    min-width: 300px;
    margin-bottom: 0;
}

@media (max-width: 768px) {
    .explanations-bar-content .explanation-item {
        flex: 1 1 100%;
    }
}

.explanation-item.number .explanation-text {
    color: var(--warning);
}

.explanation-item.antonym .explanation-text {
    color: var(--danger);
}

.explanation-item.entity .explanation-text {
    color: var(--accent-secondary);
}

.explanation-item.alignment .explanation-text {
    color: var(--text-muted);
}

/* Metrics Bar (Timing + Cost) */
.metrics-bar {
    margin-top: 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    backdrop-filter: blur(20px);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 2rem;
    gap: 3rem;
}

.timing-section {
    display: flex;
    gap: 2rem;
}

.timing-section .timing-item {
    text-align: center;
}

.timing-section .timing-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.timing-section .timing-value {
    font-size: 1.1rem;
    font-weight: 700;
    font-family: 'JetBrains Mono', monospace;
    color: var(--accent-secondary);
}

/* Carbon Footprint Section */
.carbon-section {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.25rem;
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.2);
    border-radius: var(--radius);
}

.carbon-icon {
    font-size: 1.5rem;
}

.carbon-content {
    text-align: center;
}

.carbon-value {
    font-size: 1rem;
    font-weight: 700;
    font-family: 'JetBrains Mono', monospace;
    color: var(--success);
}

.carbon-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

.carbon-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: rgba(34, 197, 94, 0.2);
    border-radius: 50%;
    color: var(--success);
    text-decoration: none;
    transition: all 0.3s;
}

.carbon-badge:hover {
    background: var(--success);
    color: white;
    transform: scale(1.1);
}

.cost-section {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.cost-section .cost-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
}

.cost-items {
    display: flex;
    gap: 1rem;
}

.cost-section .cost-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 1rem;
    border-radius: var(--radius-sm);
}

.cost-section .cost-item.ours {
    background: rgba(34, 197, 94, 0.15);
}

.cost-section .cost-item.theirs {
    background: rgba(239, 68, 68, 0.1);
}

.cost-section .cost-name {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.cost-section .cost-value {
    font-weight: 700;
    font-family: 'JetBrains Mono', monospace;
}

.cost-section .cost-item.ours .cost-value {
    color: var(--success);
}

.cost-section .cost-item.theirs .cost-value {
    color: var(--danger);
}

@media (max-width: 768px) {
    .metrics-bar {
        flex-direction: column;
        gap: 1rem;
    }

    .timing-section {
        width: 100%;
        justify-content: space-around;
    }

    .cost-section {
        width: 100%;
        justify-content: center;
    }
}

/* Hyperparameters */
.params-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.param-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    backdrop-filter: blur(20px);
}

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

.param-header label {
    font-weight: 500;
}

.param-value {
    font-family: 'JetBrains Mono', monospace;
    background: var(--bg-tertiary);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.9rem;
    color: var(--accent-primary);
}

.param-slider {
    width: 100%;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--bg-tertiary);
    border-radius: 3px;
    outline: none;
    margin-bottom: 0.75rem;
}

.param-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    background: var(--accent-gradient);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.5);
    transition: transform 0.2s;
}

.param-slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

.param-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Presets */
.presets-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
}

.preset-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1.25rem 2rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s;
    backdrop-filter: blur(20px);
}

.preset-btn:hover {
    border-color: var(--border-hover);
    color: var(--accent-primary);
    transform: translateY(-2px);
}

.preset-btn i {
    font-size: 1.5rem;
}

/* Batch Demo */
.batch-container {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    backdrop-filter: blur(20px);
    max-width: 800px;
    margin: 0 auto;
}

.batch-controls {
    display: flex;
    align-items: flex-end;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.batch-input {
    flex: 1;
}

.batch-input label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.batch-input select {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9rem;
    cursor: pointer;
}

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

.batch-btn {
    padding: 0.75rem 1.5rem;
    background: var(--accent-gradient);
    border: none;
    border-radius: var(--radius-sm);
    color: white;
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s;
    white-space: nowrap;
}

.batch-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--glow);
}

.batch-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.batch-results {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    margin-bottom: 1.5rem;
}

@media (max-width: 600px) {
    .batch-results {
        grid-template-columns: repeat(2, 1fr);
    }
}

.batch-metric {
    text-align: center;
    padding: 1rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
}

.batch-metric-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.batch-metric-value {
    font-size: 1.1rem;
    font-weight: 600;
    font-family: 'JetBrains Mono', monospace;
    color: var(--accent-primary);
}

.batch-progress {
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: 3px;
    overflow: hidden;
}

.batch-progress-bar {
    height: 100%;
    background: var(--accent-gradient);
    transition: width 0.3s ease;
}

/* How It Works */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.step-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    text-align: center;
    backdrop-filter: blur(20px);
    transition: all 0.3s;
}

.step-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
}

.step-number {
    width: 40px;
    height: 40px;
    background: var(--accent-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
    margin: 0 auto 1rem;
}

.step-card h4 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

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

/* Footer */
footer {
    padding: 2rem;
    text-align: center;
    border-top: 1px solid var(--border);
    background: var(--bg-secondary);
}

.footer-content {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.footer-content a {
    color: var(--accent-primary);
    text-decoration: none;
}

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

/* Responsive */
@media (max-width: 768px) {
    nav {
        padding: 1rem;
    }

    .nav-title {
        display: none;
    }

    .hero {
        padding: 6rem 1rem 2rem;
    }

    .section {
        padding: 1.5rem 1rem;
    }

    .batch-controls {
        flex-direction: column;
        align-items: stretch;
    }
}