:root {
    --bg-color: #050505;
    --text-color: #f0f0f0;
    --accent-color: #ffffff;
    --border-color: #222222;
    --card-bg: #111111;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.8;
    overflow-x: hidden;
}

.hero {
    position: relative;
    width: 100%;
    height: 80vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    background-color: #000;
}

.hero-img {
    position: absolute;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.6;
    filter: grayscale(100%) contrast(1.2);
}

.hero-overlay {
    position: relative;
    z-index: 10;
    text-align: center;
    padding: 20px;
    max-width: 900px;
}

h1 {
    font-size: clamp(2.5rem, 8vw, 5.5rem);
    font-weight: 200;
    letter-spacing: -0.05em;
    line-height: 1.1;
    margin-bottom: 20px;
    color: var(--accent-color);
}

.subtitle {
    font-size: 1.1em;
    text-transform: uppercase;
    letter-spacing: 0.3em;
    color: #fff;
    font-weight: 500;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.intro-bridge {
    background-color: #000;
    padding: 60px 20px;
    border-bottom: 1px solid var(--border-color);
}

.intro-bridge .container {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.summary-text {
    font-size: 1.4em;
    color: #eee;
    font-weight: 200;
    line-height: 1.6;
    font-style: italic;
}

main {
    max-width: 1000px;
    margin: 0 auto;
    padding: 80px 20px;
}

section {
    margin-bottom: 100px;
}

h2 {
    font-size: 2.2em;
    font-weight: 300;
    margin-bottom: 40px;
    color: var(--accent-color);
    border-left: 4px solid #fff;
    padding-left: 20px;
}

p {
    font-size: 1.15em;
    color: #aaa;
    margin-bottom: 2em;
    max-width: 750px;
}

.metrics-bar {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin: 0 0 100px 0;
}

.metric-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 40px;
    border-radius: 16px;
    text-align: center;
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.metric-card:hover {
    transform: translateY(-5px);
    border-color: #444;
}

.metric-value {
    display: block;
    font-size: 3em;
    font-weight: 100;
    color: #fff;
    margin-bottom: 10px;
}

.metric-label {
    font-size: 0.8em;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: #555;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.chart-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 30px;
    display: flex;
    flex-direction: column;
}

.full-width {
    grid-column: span 2;
}

h3 {
    font-size: 1.1em;
    font-weight: 500;
    color: #888;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.chart-wrapper {
    position: relative;
    height: 350px;
    width: 100%;
}

.caption {
    font-size: 0.85em;
    color: #444;
    margin-top: 20px;
    border-top: 1px solid #222;
    padding-top: 15px;
}

footer {
    padding: 60px 20px;
    border-top: 1px solid #111;
    text-align: center;
    color: #333;
    font-size: 0.8em;
    letter-spacing: 0.1em;
}

@media (max-width: 850px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }

    .full-width {
        grid-column: span 1;
    }

    .hero {
        height: 60vh;
    }
}