:root {
    --bg: #080909;
    --surface: #080909;
    --surface-muted: #080909;
    --border: rgba(148, 163, 184, 0.25);
    --text-primary: #efe1d1;
    --text-muted: #fbecda;
    --accent: #1ca350;
    --accent-hover: #29b675;
    --shadow: 0 25px 75px rgba(2, 6, 23, 0.55);
    --shadow-lg: 0 35px 100px rgba(2, 6, 23, 0.7);
    font-family: Helvetica, Sans-Serif;
    line-height: 1.6;
    color-scheme: dark;
}

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

body {
    min-height: 100vh;
    background-color: var(--bg);
    background: radial-gradient(circle at top, rgba(14, 18, 15, 0.25), transparent 55%), var(--bg);
    color: var(--text-primary);
}

nav {
    position: sticky;
    top: 0;
    z-index: 50;
    padding: 1rem clamp(1.5rem, 4vw, 3.5rem);
    background: #080909;
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(18px);
}

nav ul {
    list-style: none;
    display: flex;
    gap: 2rem;
    justify-content: flex-end;
}

nav a {
    color: var(--text-muted);
    font-weight: 500;
    letter-spacing: 0.02em;
    text-decoration: none;
    transition: color 0.2s ease;
}

nav a:hover {
    color: var(--text-primary);
    text-decoration: underline;
}

.hero {
    min-height: 85vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: clamp(3rem, 8vw, 6rem) clamp(1.5rem, 4vw, 3.5rem);
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 1.5rem;
    background: linear-gradient(to right, var(--text-primary), var(--text-muted));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero > p {
    font-size: clamp(1.5rem, 2vw, 1.25rem);
    margin-bottom: 2.5rem;
    max-width: 700px;
}

.cta {
    padding: 1rem 2.25rem;
    font-size: 1.8rem;
    font-weight: 600;
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    color: var(--text-primary);
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 8px 24px rgba(83, 209, 137, 0.3);
    margin-bottom: 1rem;
}

.cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(83, 209, 137, 0.3);
}

.cta:active,
.cta:visited,
.cta:focus {
    color: var(--text-primary);
}

.cta a,
.cta a:visited,
.cta a:hover,
.cta a:active {
    color: var(--text-primary);
    text-decoration: none;
}

.hero > p:last-of-type {
    margin-top: 0.5rem;
    margin-bottom: 0;
}


.hero p {
    color: var(--text-primary)
}
.investigate-data a {
    color: var(--accent);
    text-decoration: underline;
    font-size: 1.5rem;
    transition: color 0.2s ease;
}

.investigate-data a:hover {
    color: var(--accent-hover);
}

section {
    padding: clamp(4rem, 8vw, 6rem) clamp(1.5rem, 4vw, 3.5rem);
    max-width: 1200px;
    margin: 0 auto;
}

section h2 {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: 1.5rem;
    text-align: center;
}

.discover-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: 1.5rem;
}

.discover-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.discover-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(83, 209, 137, 0.3);
}

.discover-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--accent);
}

.discover-card p {
    color: var(--text-muted);
    line-height: 1.7;
}

.why-matters {
    border-radius: 32px;
    margin: 4rem auto;
    padding: clamp(4rem, 8vw, 6rem) clamp(2rem, 5vw, 4rem);
}

.why-matters > p {
    font-size: 1.3rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
    text-align: center;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.why-matters ul {
    list-style: none;
    max-width: 650px;
    margin: 0 auto;
}

.why-matters li {
    padding: 1rem 1.5rem;
    margin-bottom: 0.75rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--text-primary);
    position: relative;
    padding-left: 2.8rem;
    font-size: 1.3rem;
}

.why-matters li::before {
    content: '✓';
    position: absolute;
    left: 1rem;
    color: var(--accent);
    font-weight: 600;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.category-card {
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 2.5rem 2rem;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.category-card:hover {
    transform: translateY(-4px);
    border-color: rgba(83, 209, 137, 0.3);
}

.category-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.category-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--accent);
    color: var()
}

.category-card p {
    color: var(--text-muted);
    line-height: 1.7;
}

.map-preview {
    background: var(--surface-muted);
    border-radius: 32px;
    margin: 4rem auto;
    padding: clamp(3.5rem, 8vw, 6rem) clamp(2rem, 5vw, 4rem);
}

.preview-container {
    text-align: center;
    padding: 3rem 2rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 24px;
    box-shadow: var(--shadow);
}

.preview-placeholder {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 3.5rem;
    padding: 4rem 2rem;
    background: rgba(148, 163, 184, 0.05);
    border-radius: 16px;
    border: 2px dashed var(--border);
}

.use-case-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.use-case-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.use-case-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(83, 209, 137, 0.3);
}

.use-case-item h3 {
    font-size: 1.35rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--accent);
}

.use-case-item p {
    color: var(--text-muted);
    line-height: 1.7;
}

.methodology {
    background: var(--surface-muted);
    border-radius: 32px;
    margin: 4rem auto;
    padding: clamp(4rem, 8vw, 6rem) clamp(2rem, 5vw, 4rem);
    text-align: center;
}

.methodology > p {
    font-size: 1.15rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.methodology-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: color 0.2s ease, transform 0.2s ease;
}

.methodology-link:hover {
    color: var(--accent-hover);
    transform: translateX(4px);
}

.final-cta {
    text-align: center;
    padding: clamp(5rem, 10vw, 8rem) clamp(1.5rem, 4vw, 3.5rem);
}

.final-cta h2 {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    margin-bottom: 1rem;
}

.final-cta > p {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
}

.secondary-links {
    display: flex;
    gap: 2rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 2rem;
}

.secondary-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

.secondary-links a:hover {
    color: var(--text-primary);
}

footer {
    padding: 3rem clamp(1.5rem, 4vw, 3.5rem);
    text-align: center;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    background: var(--surface-muted);
}

@media (max-width: 768px) {
    nav ul {
        justify-content: center;
        flex-wrap: wrap;
    }

    .hero {
        min-height: 75vh;
    }

    .discover-grid,
    .category-grid,
    .use-case-grid {
        grid-template-columns: 1fr;
    }

    .secondary-links {
        flex-direction: column;
        gap: 1rem;
    }
}