:root {
    --ink: #17191c;
    --ink-soft: #2b3036;
    --muted: #66707a;
    --line: #dfe4e8;
    --paper: #ffffff;
    --wash: #f5f7f8;
    --accent: #1e6fa8;
    --accent-dark: #15527d;
    --accent-soft: #e9f3fa;
    --success: #176b45;
    --danger: #a72b2b;
    --radius: 18px;
    --shadow: 0 18px 45px rgba(20, 28, 36, 0.08);
    --max: 1180px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: 16px;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

a {
    color: inherit;
}

header {
    width: min(calc(100% - 40px), var(--max));
    margin: 0 auto;
    min-height: 86px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
    border-bottom: 1px solid var(--line);
}

.brand {
    color: var(--ink);
    text-decoration: none;
    font-size: 1.2rem;
    font-weight: 850;
    letter-spacing: -0.03em;
}

nav {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
}

nav a {
    padding: 10px 12px;
    color: var(--ink-soft);
    text-decoration: none;
    font-size: 0.94rem;
    font-weight: 650;
    border-radius: 10px;
}

nav a:hover {
    background: var(--wash);
    color: var(--ink);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 46px;
    padding: 12px 20px;
    border: 0;
    border-radius: 12px;
    background: var(--accent);
    color: #fff !important;
    text-decoration: none;
    font: inherit;
    font-weight: 800;
    cursor: pointer;
    box-shadow: 0 8px 22px rgba(30, 111, 168, 0.18);
    transition: transform .16s ease, background .16s ease, box-shadow .16s ease;
}

.btn:hover {
    background: var(--accent-dark);
    transform: translateY(-1px);
    box-shadow: 0 12px 26px rgba(30, 111, 168, 0.24);
}

main {
    min-height: 65vh;
}

.hero {
    position: relative;
    overflow: hidden;
    background:
        radial-gradient(circle at 80% 15%, rgba(30, 111, 168, 0.18), transparent 32%),
        linear-gradient(135deg, #11161b 0%, #222a31 100%);
    color: #fff;
}

.hero > div {
    width: min(calc(100% - 40px), var(--max));
    margin: 0 auto;
    padding: clamp(82px, 11vw, 150px) 0;
}

.hero small {
    display: block;
    margin-bottom: 18px;
    color: #a9cce5;
    font-size: 0.78rem;
    font-weight: 850;
    letter-spacing: 0.16em;
}

.hero h1 {
    max-width: 760px;
    margin: 0;
    font-size: clamp(2.75rem, 7vw, 5.7rem);
    line-height: 0.98;
    letter-spacing: -0.055em;
    text-wrap: balance;
}

.hero p {
    max-width: 660px;
    margin: 26px 0 34px;
    color: #dce5eb;
    font-size: clamp(1.08rem, 2vw, 1.35rem);
}

.section {
    width: min(calc(100% - 40px), var(--max));
    margin: 0 auto;
    padding: clamp(70px, 9vw, 118px) 0;
}

.section.narrow {
    max-width: 820px;
}

.section > h1,
.section > h2 {
    margin: 0 0 18px;
    line-height: 1.04;
    letter-spacing: -0.04em;
}

.section > h1 {
    font-size: clamp(2.4rem, 5vw, 4.2rem);
}

.section > h2 {
    font-size: clamp(2rem, 4vw, 3.3rem);
}

.lead {
    color: var(--ink-soft);
    font-size: clamp(1.16rem, 2vw, 1.38rem);
}

.cards {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
    margin-top: 34px;
}

.card {
    position: relative;
    min-height: 210px;
    padding: 28px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--paper);
    color: var(--ink);
    text-decoration: none;
    box-shadow: 0 1px 0 rgba(20, 25, 30, 0.02);
    transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}

.card::after {
    content: "→";
    position: absolute;
    right: 24px;
    bottom: 22px;
    color: var(--accent);
    font-size: 1.35rem;
    font-weight: 800;
}

.card:hover {
    transform: translateY(-4px);
    border-color: #b9c8d3;
    box-shadow: var(--shadow);
}

.card h3 {
    margin: 0 0 10px;
    font-size: 1.35rem;
    letter-spacing: -0.025em;
}

.card p {
    max-width: 30ch;
    margin: 0;
    color: var(--muted);
}

.section.dark {
    width: min(calc(100% - 40px), var(--max));
    margin-bottom: clamp(60px, 8vw, 100px);
    padding: clamp(46px, 6vw, 72px);
    border-radius: 26px;
    background: var(--ink);
    color: #fff;
}

.section.dark h2 {
    max-width: 720px;
}

.section.dark p {
    max-width: 700px;
    color: #ced6dc;
}

.gallery {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
    margin-top: 32px;
}

.gallery figure {
    overflow: hidden;
    margin: 0;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--paper);
}

.gallery img {
    display: block;
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    background: var(--wash);
}

.gallery figcaption {
    padding: 18px 20px 20px;
    color: var(--muted);
}

.gallery figcaption strong {
    color: var(--ink);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
    margin-top: 32px;
}

.form-grid label {
    display: grid;
    gap: 8px;
    color: var(--ink-soft);
    font-size: 0.92rem;
    font-weight: 750;
}

.form-grid .wide {
    grid-column: 1 / -1;
}

input,
select,
textarea {
    width: 100%;
    border: 1px solid #cfd7dd;
    border-radius: 11px;
    background: #fff;
    color: var(--ink);
    padding: 13px 14px;
    font: inherit;
    font-weight: 450;
    outline: none;
}

input:focus,
select:focus,
textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px var(--accent-soft);
}

textarea {
    resize: vertical;
}

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

.flash,
.errors {
    width: min(calc(100% - 40px), var(--max));
    margin: 20px auto 0;
    padding: 14px 16px;
    border-radius: 11px;
}

.flash {
    background: #e9f6ef;
    color: var(--success);
}

.errors {
    background: #fff0f0;
    color: var(--danger);
}

footer {
    width: min(calc(100% - 40px), var(--max));
    margin: 0 auto;
    padding: 34px 0 48px;
    border-top: 1px solid var(--line);
    display: grid;
    grid-template-columns: 1.2fr 1fr 1fr;
    gap: 20px;
    color: var(--muted);
    font-size: 0.92rem;
}

footer strong {
    color: var(--ink);
}

@media (max-width: 900px) {
    header {
        padding: 18px 0;
        align-items: flex-start;
        flex-direction: column;
    }

    nav {
        width: 100%;
    }

    .cards,
    .gallery {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    footer {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    header,
    .section,
    .hero > div,
    footer,
    .flash,
    .errors {
        width: min(calc(100% - 28px), var(--max));
    }

    nav a {
        padding: 8px 9px;
    }

    nav .btn {
        width: 100%;
        margin-top: 4px;
    }

    .cards,
    .gallery,
    .form-grid {
        grid-template-columns: 1fr;
    }

    .form-grid .wide {
        grid-column: auto;
    }

    .card {
        min-height: 180px;
    }

    .section.dark {
        width: min(calc(100% - 28px), var(--max));
        padding: 34px 24px;
        border-radius: 20px;
    }
}