:root {
    --primary: #1f2937;
    --accent: #0f766e;
    --bg: #f4f6f9;
    --bg-soft: #eef2f7;
    --card: #ffffff;
    --border: #dbe3ee;
    --text: #0f172a;
    --muted: #475569;
    --shadow: 0 10px 28px rgba(15, 23, 42, 0.08);
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
}

body {
    font-family: "Optima", "Candara", "Palatino", "Book Antiqua", serif;
    color: var(--text);
    background:
        radial-gradient(circle at 12% 18%, rgba(15, 118, 110, 0.11), transparent 35%),
        radial-gradient(circle at 88% 8%, rgba(31, 41, 55, 0.12), transparent 34%),
        linear-gradient(180deg, #f9fbfe 0%, var(--bg) 42%, #f9fbfe 100%);
    line-height: 1.55;
}

.shell {
    width: min(1080px, calc(100% - 40px));
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    backdrop-filter: blur(8px);
    background: rgba(249, 251, 254, 0.86);
    border-bottom: 1px solid rgba(219, 227, 238, 0.9);
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    min-height: 76px;
}

.logo {
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
}

.logo-mark {
    font-size: 1.55rem;
    font-weight: 700;
    line-height: 1.05;
}

.logo-sub {
    font-size: 0.86rem;
    color: var(--muted);
}

.main-nav {
    display: flex;
    gap: 18px;
    flex-wrap: wrap;
}

.main-nav a {
    text-decoration: none;
    color: var(--muted);
    font-size: 0.98rem;
}

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

.hero {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 30px;
    padding: 72px 0 48px;
    align-items: stretch;
}

.eyebrow {
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.09em;
    font-size: 0.76rem;
    margin: 0 0 12px;
}

h1 {
    font-size: clamp(1.9rem, 5vw, 3.1rem);
    line-height: 1.15;
    margin: 0;
}

h2 {
    margin: 0;
    font-size: clamp(1.4rem, 3vw, 2rem);
    line-height: 1.2;
}

h3 {
    margin: 0 0 8px;
    font-size: 1.12rem;
}

.lead {
    margin: 18px 0 0;
    color: var(--muted);
    max-width: 60ch;
}

.hero-actions {
    display: flex;
    gap: 12px;
    margin-top: 24px;
    flex-wrap: wrap;
}

.hero-card {
    padding: 24px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    box-shadow: var(--shadow);
}

.hero-card h2 {
    font-size: 1.2rem;
    margin-bottom: 12px;
}

.hero-card ul {
    margin: 0;
    padding-left: 20px;
    color: var(--muted);
}

.hero-card li + li {
    margin-top: 8px;
}

.section {
    padding: 40px 0;
}

.section-alt {
    background: linear-gradient(180deg, rgba(238, 242, 247, 0.35), rgba(238, 242, 247, 0.7));
    border-top: 1px solid rgba(219, 227, 238, 0.8);
    border-bottom: 1px solid rgba(219, 227, 238, 0.8);
}

.section-head {
    margin-bottom: 20px;
}

.grid-features {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.card,
.use-item {
    border: 1px solid var(--border);
    background: var(--card);
    border-radius: 14px;
    padding: 18px;
    box-shadow: var(--shadow);
}

.card p,
.use-item p,
.step p {
    color: var(--muted);
    margin: 0;
}

.grid-use {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.steps {
    margin: 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 12px;
}

.step {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 16px;
    display: grid;
    grid-template-columns: 46px 1fr;
    gap: 14px;
    align-items: start;
    box-shadow: var(--shadow);
}

.num {
    width: 46px;
    height: 46px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    font-weight: 700;
    color: #fff;
    background: linear-gradient(140deg, var(--primary), var(--accent));
}

.btn {
    text-decoration: none;
    border-radius: 8px;
    border: 1px solid transparent;
    padding: 11px 16px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    transition: transform 130ms ease, box-shadow 130ms ease, background 130ms ease;
}

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

.btn-primary {
    color: #fff;
    background: var(--primary);
    border-color: var(--primary);
    box-shadow: 0 8px 16px rgba(15, 23, 42, 0.18);
}

.btn-secondary {
    color: var(--primary);
    background: rgba(255, 255, 255, 0.72);
    border-color: var(--border);
}

.site-footer {
    margin-top: 30px;
    border-top: 1px solid var(--border);
    background: #f8fafc;
}

.footer-wrap {
    padding: 30px 0;
    display: grid;
    grid-template-columns: 1fr auto auto;
    gap: 16px;
    align-items: center;
}

.footer-wrap p {
    margin: 2px 0;
    color: var(--muted);
}

.contact-box {
    max-width: 540px;
}

.contact-form {
    margin-top: 12px;
    display: grid;
    gap: 10px;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.contact-form label {
    display: grid;
    gap: 6px;
    font-size: 0.92rem;
    color: var(--muted);
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 10px 12px;
    font: inherit;
    color: var(--text);
    background: #fff;
}

.contact-form textarea {
    resize: vertical;
}

.hp-field {
    position: absolute;
    left: -10000px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

.contact-feedback {
    min-height: 1.2em;
    font-size: 0.9rem;
    margin: 0;
}

.contact-feedback.is-ok {
    color: #0f766e;
}

.contact-feedback.is-err {
    color: #b91c1c;
}

.reveal {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 500ms ease, transform 500ms ease;
}

.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 920px) {
    .topbar {
        min-height: 84px;
        align-items: center;
        flex-wrap: wrap;
        padding: 8px 0;
    }

    .main-nav {
        order: 3;
        width: 100%;
    }

    .hero {
        grid-template-columns: 1fr;
        padding-top: 46px;
    }

    .grid-features,
    .grid-use {
        grid-template-columns: 1fr;
    }

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

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