:root {
    --background: #f7f8fa;
    --surface: #ffffff;
    --surface-alt: #eef1f4;
    --text: #18202a;
    --muted: #5c6875;
    --border: #dce2e8;
    --accent: #173f5f;
    --accent-dark: #102e46;
    --accent-light: #dbe8f1;
    --max-width: 1180px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background: var(--background);
    color: var(--text);
    font-family:
        Inter,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;
    line-height: 1.7;
}

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

.site-header {
    background: rgba(247, 248, 250, 0.95);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    align-items: center;
    display: flex;
    justify-content: space-between;
    margin: 0 auto;
    max-width: var(--max-width);
    padding: 1.1rem 2rem;
}

.logo {
    font-size: 1.15rem;
    font-weight: 750;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    gap: 1.6rem;
}

.nav-links a {
    color: var(--muted);
    font-size: 0.95rem;
    font-weight: 600;
}

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

.hero {
    align-items: center;
    display: flex;
    min-height: 78vh;
    padding: 6rem 2rem;
}

.hero-content {
    margin: 0 auto;
    max-width: var(--max-width);
    width: 100%;
}

.eyebrow {
    color: var(--accent);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.14em;
    margin-bottom: 1rem;
}

.hero h1 {
    font-size: clamp(2.8rem, 7vw, 5.8rem);
    font-weight: 760;
    letter-spacing: -0.055em;
    line-height: 0.98;
    max-width: 1000px;
}

.hero-description {
    color: var(--muted);
    font-size: 1.2rem;
    margin-top: 2rem;
    max-width: 760px;
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 2.3rem;
}

.button {
    border: 1px solid transparent;
    border-radius: 6px;
    display: inline-block;
    font-weight: 700;
    padding: 0.85rem 1.35rem;
    transition: 0.2s ease;
}

.button.primary {
    background: var(--accent);
    color: white;
}

.button.primary:hover {
    background: var(--accent-dark);
    transform: translateY(-2px);
}

.button.secondary {
    background: transparent;
    border-color: var(--border);
}

.button.secondary:hover {
    background: var(--surface);
    border-color: var(--accent);
}

.section {
    margin: 0 auto;
    max-width: var(--max-width);
    padding: 6rem 2rem;
}

.section.alternate {
    background: var(--surface-alt);
    max-width: none;
}

.section.alternate .two-column {
    margin: 0 auto;
    max-width: var(--max-width);
}

.section-heading {
    margin-bottom: 2.8rem;
    max-width: 720px;
}

.section h2,
.contact-banner h2 {
    font-size: clamp(2rem, 4vw, 3.2rem);
    letter-spacing: -0.04em;
    line-height: 1.1;
}

.card-grid {
    display: grid;
    gap: 1.4rem;
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 2rem;
}

.card h3 {
    font-size: 1.3rem;
    margin-bottom: 0.8rem;
}

.card p {
    color: var(--muted);
}

.project-card {
    min-height: 275px;
}

.tag {
    background: var(--accent-light);
    border-radius: 100px;
    color: var(--accent);
    display: inline-block;
    font-size: 0.74rem;
    font-weight: 750;
    margin-bottom: 1.2rem;
    padding: 0.35rem 0.7rem;
}

.text-link {
    color: var(--accent);
    display: inline-block;
    font-weight: 750;
    margin-top: 1.2rem;
}

.text-link:hover {
    text-decoration: underline;
}

.two-column {
    display: grid;
    gap: 4rem;
    grid-template-columns: 1fr 1fr;
}

.two-column p {
    color: var(--muted);
    margin-bottom: 1.2rem;
}

.contact-banner {
    align-items: center;
    background: var(--accent-dark);
    color: white;
    display: flex;
    justify-content: space-between;
    margin: 4rem auto;
    max-width: var(--max-width);
    padding: 3rem;
}

.contact-banner .eyebrow {
    color: #bcd5e7;
}

.contact-banner .button.primary {
    background: white;
    color: var(--accent-dark);
}

.site-footer {
    border-top: 1px solid var(--border);
    color: var(--muted);
    padding: 2rem;
    text-align: center;
}

@media (max-width: 800px) {
    .navbar {
        align-items: flex-start;
        flex-direction: column;
        gap: 1rem;
    }

    .nav-links {
        flex-wrap: wrap;
        gap: 0.8rem 1.2rem;
    }

    .hero {
        min-height: auto;
        padding-bottom: 5rem;
        padding-top: 5rem;
    }

    .card-grid,
    .two-column {
        grid-template-columns: 1fr;
    }

    .contact-banner {
        align-items: flex-start;
        flex-direction: column;
        gap: 2rem;
        margin-left: 1rem;
        margin-right: 1rem;
    }
}