:root {
    --bg: #f8fafc;
    --surface: #ffffff;
    --surface-alt: #eef2ff;
    --text: #0f172a;
    --muted: #475569;
    --line: #e2e8f0;
    --primary: #0f172a;
    --accent: #2563eb;
    --shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
    --radius: 18px;
    --container: 1120px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: 'Inter', Arial, sans-serif;
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
    color: var(--text);
    line-height: 1.6;
}

a {
    color: inherit;
    text-decoration: none;
}

.container {
    width: min(calc(100% - 2rem), var(--container));
    margin: 0 auto;
}

.narrow {
    width: min(calc(100% - 2rem), 840px);
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    backdrop-filter: blur(10px);
    background: rgba(248, 250, 252, 0.85);
    border-bottom: 1px solid rgba(226, 232, 240, 0.8);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 72px;
    gap: 1rem;
}

.brand {
    font-weight: 800;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    gap: 1.25rem;
    color: var(--muted);
    font-weight: 500;
}

.hero {
    padding: 5rem 0 4rem;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 2rem;
    align-items: center;
}

.eyebrow {
    display: inline-block;
    margin-bottom: 0.75rem;
    font-size: 0.875rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--accent);
}

h1, h2, h3 {
    margin: 0 0 1rem;
    line-height: 1.1;
    letter-spacing: -0.03em;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    max-width: 12ch;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
    font-size: 1.25rem;
}

.lead,
.section-heading p,
.contact-box p,
.feature-card p,
.hero-card li {
    color: var(--muted);
    font-size: 1.05rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: 2rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0.85rem 1.2rem;
    border-radius: 999px;
    font-weight: 700;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: var(--shadow);
}

.btn-secondary {
    background: #fff;
    border: 1px solid var(--line);
}

.hero-card .card,
.feature-card,
.contact-box {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.hero-card .card {
    padding: 1.5rem;
}

.card-label {
    margin: 0 0 0.75rem;
    font-weight: 700;
}

.hero-card ul {
    margin: 0;
    padding-left: 1.2rem;
}

.section {
    padding: 4.5rem 0;
}

.section-alt {
    background: var(--surface-alt);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.section-heading {
    margin-bottom: 2rem;
}

.section-heading.center {
    text-align: center;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
}

.feature-card {
    padding: 1.5rem;
}

.contact-box {
    padding: 2rem;
    text-align: center;
}

.site-footer {
    padding: 2rem 0 3rem;
    border-top: 1px solid var(--line);
    color: var(--muted);
}

.footer-inner {
    text-align: center;
}

@media (max-width: 900px) {
    .hero-grid,
    .feature-grid {
        grid-template-columns: 1fr;
    }

    .nav {
        flex-direction: column;
        justify-content: center;
        padding: 0.75rem 0;
    }

    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero {
        padding-top: 3.5rem;
    }
}

@media (max-width: 600px) {
    .hero-actions {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }
}