/* Apple Style Minimalist Theme */
:root {
    --primary: #0071e3;
    /* Apple Blue */
    --primary-hover: #0077ed;
    --bg-body: #f5f5f7;
    /* Light grey background */
    --bg-card: #ffffff;
    --text-primary: #1d1d1f;
    /* Apple Black */
    --text-secondary: #515154;
    /* Darker grey */
    --border: #d2d2d7;
    --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.08);
    /* Stronger shadow */
    --radius-card: 20px;
    --radius-btn: 980px;
    /* Capsule */
    --font-stack: "SF Pro Text", "SF Pro Icons", "Helvetica Neue", "Helvetica", "Arial", sans-serif;
}

/* Reset & Base */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-stack);
    background-color: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.47059;
    letter-spacing: -0.022em;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* Hero Section */
.hero {
    padding: 4rem 2rem 2rem;
    text-align: center;
    background: var(--bg-body);
}

.hero-content {
    max-width: 980px;
    margin: 0 auto;
}

.badge {
    display: inline-block;
    color: var(--primary);
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 0.8rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.hero h1 {
    font-size: 48px;
    line-height: 1.08349;
    font-weight: 700;
    letter-spacing: -0.003em;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.subtitle {
    font-size: 24px;
    line-height: 1.16667;
    font-weight: 400;
    letter-spacing: 0.009em;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.description {
    font-size: 17px;
    line-height: 1.47059;
    font-weight: 400;
    letter-spacing: -0.022em;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 2rem;
}

.stats-row {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-top: 2rem;
}

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

.stat-value {
    display: block;
    font-size: 28px;
    font-weight: 600;
    color: var(--text-primary);
}

.stat-label {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Main Content */
.content {
    max-width: 1800px;
    /* Maximize width for charts */
    margin: 0 auto;
    padding: 2rem;
}

/* Sections */
.section {
    margin-bottom: 4rem;
}

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

.section-header h2 {
    font-size: 32px;
    line-height: 1.125;
    font-weight: 700;
    letter-spacing: 0.004em;
    margin-bottom: 0.5rem;
}

.section-header p {
    font-size: 17px;
    color: var(--text-secondary);
}

/* Toggle Buttons */
.dimension-toggle {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.dim-btn {
    padding: 8px 16px;
    background: rgba(0, 0, 0, 0.05);
    border: none;
    border-radius: var(--radius-btn);
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 400;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.dim-btn:hover {
    background: rgba(0, 0, 0, 0.1);
}

.dim-btn.active {
    background: var(--text-primary);
    /* Black active state like Apple */
    color: white;
}

.toggle-btn {
    padding: 10px 20px;
    background: rgba(0, 0, 0, 0.05);
    border: none;
    border-radius: var(--radius-btn);
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
}

.toggle-btn:hover {
    background: rgba(0, 0, 0, 0.12);
}

.toggle-btn.active {
    background: var(--text-primary);
    color: white;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

/* Shared Legend for Scaling and Probing */
.shared-legend {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: var(--bg-card);
    border-radius: 12px;
    box-shadow: var(--shadow-card);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 13px;
    color: var(--text-primary);
}

.legend-color {
    width: 24px;
    height: 3px;
    border-radius: 2px;
}

/* Charts Grid */
.charts-grid {
    display: grid;
    gap: 16px;
    /* Tighter gap */
}

.charts-grid.three-col {
    grid-template-columns: repeat(3, 1fr);
}

.charts-grid.single {
    grid-template-columns: 1fr;
    max-width: 1000px;
    margin: 0 auto;
}

/* Chart Card */
.chart-card {
    background: var(--bg-card);
    border-radius: var(--radius-card);
    padding: 24px;
    box-shadow: var(--shadow-card);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.chart-card:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.chart-card h3 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.chart-card.wide {
    padding: 32px;
}

/* Chart Containers */
.chart-container {
    height: 300px;
    /* Reduced height */
    width: 100%;
    transition: opacity 0.3s ease;
}

.chart-container-tall {
    height: 450px;
    /* Reduced height */
    transition: opacity 0.3s ease;
    width: 100%;
}

.chart-container-double {
    height: 600px;
    /* Double height for error analysis */
    width: 100%;
}

/* Footer */
.footer {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-secondary);
    font-size: 12px;
    background: var(--bg-body);
    border-top: 1px solid var(--border);
}

/* Responsive */
@media (max-width: 1024px) {
    .charts-grid.three-col {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 36px;
    }

    .subtitle {
        font-size: 20px;
    }

    .charts-grid.three-col {
        grid-template-columns: 1fr;
    }

    .chart-container {
        height: 300px;
    }

    .chart-container-tall {
        height: 400px;
    }
}

/* Plotly Overrides */
.js-plotly-plot .plotly .modebar {
    display: none !important;
}