:root {
    --bg: #f4f7f8;
    --surface: #ffffff;
    --ink: #152226;
    --muted: #596c72;
    --brand: #0f7b6c;
    --brand-dark: #0b4f46;
    --line: #dbe5e8;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    color: var(--ink);
    background: radial-gradient(circle at 0 0, #e7f5f2 0, var(--bg) 36%);
    line-height: 1.6;
}

.container {
    width: min(1120px, 92%);
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    background: rgba(255, 255, 255, 0.92);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(8px);
}

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

.brand {
    color: var(--brand-dark);
    font-weight: 800;
    font-size: 1.1rem;
    text-decoration: none;
    letter-spacing: 0.3px;
}

.main-nav {
    display: flex;
    gap: 1rem;
}

.main-nav a {
    text-decoration: none;
    color: var(--ink);
    padding: 0.4rem 0.65rem;
    border-radius: 8px;
    font-weight: 600;
}

.main-nav a:hover,
.main-nav a.active {
    background: #e3f3ef;
    color: var(--brand-dark);
}

.menu-btn {
    display: none;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 0.45rem 0.65rem;
}

.hero {
    padding: 4.2rem 0 2.6rem;
}

.hero-grid {
    display: grid;
    gap: 2rem;
    grid-template-columns: 1.4fr 1fr;
    align-items: start;
}

.tag {
    display: inline-block;
    margin: 0;
    background: #d8efe9;
    color: var(--brand-dark);
    padding: 0.2rem 0.6rem;
    border-radius: 99px;
    font-size: 0.85rem;
    font-weight: 700;
}

h1,
h2,
h3 {
    line-height: 1.25;
}

h1 {
    font-size: clamp(1.9rem, 4vw, 3rem);
    margin: 0.8rem 0;
}

.lead {
    font-size: 1.1rem;
    max-width: 60ch;
    color: #1f3136;
}

.card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 1.2rem 1.3rem;
    box-shadow: 0 8px 30px rgba(21, 34, 38, 0.06);
}

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

.section {
    padding: 2.6rem 0;
}

.section-alt {
    background: #eef4f6;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.feature {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 1.3rem;
}

.grid-three {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-three article {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 1rem;
}

.btn {
    display: inline-block;
    text-decoration: none;
    border-radius: 9px;
    padding: 0.7rem 1rem;
    font-weight: 700;
}

.cta-row {
    display: flex;
    gap: 0.8rem;
    margin-top: 1.2rem;
    flex-wrap: wrap;
}

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

.btn-primary:hover {
    background: var(--brand-dark);
}

.btn-secondary {
    background: #e4f0f2;
    color: var(--ink);
}

.btn-outline {
    border: 1px solid var(--line);
    color: var(--ink);
}

.content-narrow {
    max-width: 760px;
}

.contact-list {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 1rem;
}

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

.site-footer {
    border-top: 1px solid var(--line);
    background: #f9fbfb;
}

.footer-wrap {
    min-height: 80px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

@media (max-width: 920px) {
    .hero-grid,
    .grid-three {
        grid-template-columns: 1fr;
    }

    .feature {
        flex-direction: column;
        align-items: flex-start;
    }

    .menu-btn {
        display: inline-block;
    }

    .main-nav {
        position: absolute;
        top: 72px;
        right: 4%;
        left: 4%;
        background: #fff;
        border: 1px solid var(--line);
        border-radius: 12px;
        padding: 0.65rem;
        flex-direction: column;
        display: none;
    }

    .main-nav[data-open="true"] {
        display: flex;
    }
}