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

:root {
    --bg: #0a1a1e;
    --text: #e8eded;
    --text-muted: #8a9fa5;
    --accent: #2ec4b6;
    --border: #143036;
    --surface: #0f2328;
    --max-width: 1140px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

/* ── Nav ── */

nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 26, 30, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

.nav-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1.25rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text);
    text-decoration: none;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 400;
    transition: color 0.2s;
}

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

/* ── Hero ── */

.hero {
    padding: 12rem 0 8rem;
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.hero h1 {
    font-size: clamp(2.5rem, 5.5vw, 4.5rem);
    font-weight: 300;
    line-height: 1.15;
    letter-spacing: -0.03em;
    max-width: 900px;
}

.hero-sub {
    margin-top: 2rem;
    font-size: clamp(1.05rem, 1.5vw, 1.25rem);
    color: var(--text-muted);
    max-width: 680px;
    line-height: 1.7;
}

/* ── About ── */

.about {
    padding: 8rem 0;
    border-top: 1px solid var(--border);
}

.about h2 {
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent);
    margin-bottom: 4rem;
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 5rem;
    align-items: start;
}

.about-lead {
    font-size: 1.2rem;
    line-height: 1.75;
    color: var(--text);
    margin-bottom: 1.5rem;
}

.about-text p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.8;
    margin-bottom: 1.25rem;
}

.about-text p:last-child {
    margin-bottom: 0;
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    padding-top: 0.5rem;
}

.stat {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.stat-label {
    font-size: 0.7rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-muted);
}

.stat-value {
    font-size: 1rem;
    font-weight: 400;
    color: var(--text);
}

/* ── Section intro ── */

.section-intro {
    color: var(--text-muted);
    font-size: 1.05rem;
    line-height: 1.75;
    max-width: 680px;
    margin-bottom: 4rem;
}

/* ── Thesis ── */

.thesis {
    padding: 8rem 0;
    border-top: 1px solid var(--border);
}

.thesis h2 {
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent);
    margin-bottom: 4rem;
}

.thesis-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
}

.thesis-item h3 {
    font-size: 1.35rem;
    font-weight: 500;
    margin-bottom: 1rem;
    letter-spacing: -0.01em;
}

.thesis-item p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.75;
}

/* ── Focus ── */

.focus {
    padding: 8rem 0;
    border-top: 1px solid var(--border);
}

.focus h2 {
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent);
    margin-bottom: 1.5rem;
}

.focus-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
}

.focus-item {
    padding: 2.5rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
}

.focus-number {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--accent);
    margin-bottom: 1.25rem;
    font-variant-numeric: tabular-nums;
}

.focus-item h3 {
    font-size: 1.2rem;
    font-weight: 500;
    margin-bottom: 0.75rem;
    letter-spacing: -0.01em;
}

.focus-item p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.75;
}

/* ── Approach ── */

.approach {
    padding: 8rem 0;
    border-top: 1px solid var(--border);
}

.approach h2 {
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent);
    margin-bottom: 1.5rem;
}

.approach-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
}

.approach-item {
    padding: 2.5rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
}

.approach-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--accent);
    margin-bottom: 1.25rem;
}

.approach-item p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.75;
}

/* ── CTA ── */

.cta {
    padding: 8rem 0;
    border-top: 1px solid var(--border);
    text-align: center;
}

.cta h2 {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 300;
    letter-spacing: -0.02em;
    margin-bottom: 1.5rem;
}

.cta p {
    color: var(--text-muted);
    font-size: 1.05rem;
    line-height: 1.7;
    max-width: 600px;
    margin: 0 auto 2.5rem;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: var(--accent);
    color: #fff;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: 6px;
    transition: opacity 0.2s;
}

.cta-button:hover {
    opacity: 0.85;
}

/* ── Footer ── */

footer {
    padding: 6rem 0 3rem;
    border-top: 1px solid var(--border);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 4rem;
    padding-bottom: 4rem;
}

.footer-contact h3 {
    font-size: 1.25rem;
    font-weight: 400;
    margin-bottom: 1rem;
}

.footer-contact p {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.7;
    margin-bottom: 1rem;
}

.email-link {
    color: var(--accent);
    text-decoration: none;
    font-size: 1.05rem;
    transition: opacity 0.2s;
}

.email-link:hover {
    opacity: 0.75;
}

.footer-address h4,
.footer-impressum h4 {
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.footer-address p,
.footer-impressum p {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.8;
}

.footer-bottom {
    border-top: 1px solid var(--border);
    padding-top: 2rem;
    font-size: 0.8rem;
    color: var(--text-muted);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.8rem;
    transition: color 0.2s;
}

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

/* ── Responsive ── */

@media (max-width: 768px) {
    .hero {
        padding: 8rem 0 5rem;
        min-height: auto;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .about-stats {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 1.5rem;
    }

    .stat {
        min-width: 140px;
    }

    .thesis-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .focus-grid,
    .approach-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }

    .nav-links {
        gap: 1.25rem;
    }

    .nav-links a {
        font-size: 0.8rem;
    }
}