/* =============================================
   footprint.markets — Monochrome Stark Landing
   ============================================= */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    font-weight: 400;
    line-height: 1.65;
    color: #000000;
    background: #ffffff;
    overflow-x: hidden;
}

/* ---- Top Bar (8px thick black bar signature) ---- */
.top-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 8px;
    background: #000000;
    z-index: 100;
}

/* ---- Signal / Hero Section ---- */
.section-signal {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #ffffff;
    padding: 8px 40px 0;
}

.signal-content {
    text-align: center;
    max-width: 800px;
}

.brand-name {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 72px;
    letter-spacing: -2px;
    color: #000000;
    line-height: 1.1;
    margin-bottom: 12px;
}

.brand-dot {
    color: #000000;
}

.brand-subtitle {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 14px;
    letter-spacing: 16px;
    color: #888888;
    text-transform: uppercase;
    margin-bottom: 48px;
}

.hero-rule {
    width: 120px;
    height: 2px;
    background: #000000;
    margin: 0 auto 48px;
}

.hero-sentence {
    font-family: 'Inter', sans-serif;
    font-weight: 400;
    font-size: 20px;
    line-height: 1.65;
    color: #888888;
    max-width: 520px;
    margin: 0 auto;
}

/* ---- Data Sections (Alternating) ---- */
.section-data {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 80px 40px;
    position: relative;
}

.section-data::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 80px);
    height: 2px;
}

.section-light {
    background: #ffffff;
    color: #000000;
}

.section-light::before {
    background: #cccccc;
}

.section-dark {
    background: #000000;
    color: #ffffff;
}

.section-dark::before {
    background: #333333;
}

.section-inner {
    text-align: center;
    max-width: 700px;
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.section-inner.visible {
    opacity: 1;
    transform: translateY(0);
}

.section-label {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 13px;
    letter-spacing: 4px;
    text-transform: uppercase;
    margin-bottom: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.square-bullet {
    display: inline-block;
    width: 8px;
    height: 8px;
    background: #000000;
    flex-shrink: 0;
}

.section-dark .square-bullet {
    background: #ffffff;
}

.square-bullet-white {
    background: #ffffff;
}

.stat-number {
    font-family: 'Fira Code', monospace;
    font-weight: 700;
    font-size: 96px;
    line-height: 1;
    margin-bottom: 24px;
    letter-spacing: -2px;
}

.stat-context {
    font-family: 'Inter', sans-serif;
    font-weight: 400;
    font-size: 18px;
    line-height: 1.65;
    max-width: 480px;
    margin: 0 auto;
}

.section-light .stat-context {
    color: #888888;
}

.section-dark .stat-context {
    color: #cccccc;
}

/* ---- Stats Row ---- */
.section-stats {
    background: #f0f0f0;
    padding: 80px 40px;
    border-top: 2px solid #cccccc;
    border-bottom: 2px solid #cccccc;
}

.stats-row {
    display: flex;
    align-items: center;
    justify-content: center;
    max-width: 1000px;
    margin: 0 auto;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.stats-row.visible {
    opacity: 1;
    transform: translateY(0);
}

.stat-col {
    flex: 1;
    text-align: center;
    padding: 20px 30px;
}

.stat-value {
    font-family: 'Fira Code', monospace;
    font-weight: 700;
    font-size: 64px;
    line-height: 1;
    color: #000000;
    margin-bottom: 12px;
}

.stat-label {
    font-family: 'Inter', sans-serif;
    font-weight: 400;
    font-size: 13px;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: #888888;
}

.stat-divider {
    width: 1px;
    height: 80px;
    background: #cccccc;
    flex-shrink: 0;
}

/* ---- Comparison Section ---- */
.section-comparison {
    display: flex;
    min-height: 80vh;
}

.comparison-block {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 80px 60px;
}

.comparison-light {
    background: #ffffff;
    color: #000000;
}

.comparison-dark {
    background: #000000;
    color: #ffffff;
}

.comparison-inner {
    max-width: 400px;
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.comparison-inner.visible {
    opacity: 1;
    transform: translateY(0);
}

.comparison-label {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 13px;
    letter-spacing: 4px;
    text-transform: uppercase;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.comparison-number {
    font-family: 'Fira Code', monospace;
    font-weight: 700;
    font-size: 72px;
    line-height: 1;
    margin-bottom: 24px;
    letter-spacing: -2px;
}

.comparison-text {
    font-family: 'Inter', sans-serif;
    font-weight: 400;
    font-size: 16px;
    line-height: 1.65;
}

.comparison-light .comparison-text {
    color: #888888;
}

.comparison-dark .comparison-text {
    color: #cccccc;
}

/* ---- Close Section ---- */
.section-close {
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #ffffff;
    padding: 80px 40px;
}

.close-content {
    text-align: center;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.close-content.visible {
    opacity: 1;
    transform: translateY(0);
}

.close-brand {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 24px;
    color: #000000;
    letter-spacing: -0.5px;
    margin-bottom: 24px;
}

.close-rule {
    width: 60px;
    height: 1px;
    background: #cccccc;
    margin: 0 auto 24px;
}

.close-period {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 32px;
    color: #000000;
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
    .brand-name {
        font-size: 42px;
        letter-spacing: -1px;
    }

    .brand-subtitle {
        font-size: 11px;
        letter-spacing: 10px;
    }

    .hero-sentence {
        font-size: 17px;
    }

    .stat-number {
        font-size: 60px;
    }

    .stat-value {
        font-size: 40px;
    }

    .stats-row {
        flex-direction: column;
    }

    .stat-divider {
        width: 60px;
        height: 1px;
        margin: 16px 0;
    }

    .stat-col {
        padding: 16px 20px;
    }

    .section-comparison {
        flex-direction: column;
    }

    .comparison-number {
        font-size: 48px;
    }

    .comparison-block {
        padding: 60px 30px;
    }
}