:root {
    color-scheme: light;
    --ink: #0a333a;
    --muted: #5d767a;
    --primary: #11616b;
    --mint: #7bbdb6;
    --soft: #ebf4f8;
    --peach: #fed9cd;
    --coral: #dc8b70;
    --line: rgba(17, 97, 107, 0.14);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    color: var(--ink);
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
    background:
        radial-gradient(circle at 12% 4%, rgba(123, 189, 182, 0.36), transparent 34rem),
        radial-gradient(circle at 92% 10%, rgba(254, 217, 205, 0.62), transparent 28rem),
        linear-gradient(135deg, #ffffff 0%, var(--soft) 48%, #ffffff 100%);
}

.wrap,
.doc {
    width: min(880px, calc(100% - 40px));
    margin: 0 auto;
}

.wrap {
    padding: 76px 0 44px;
}

.doc {
    padding: 44px 0 72px;
    line-height: 1.72;
}

.hero {
    padding: 42px;
    border: 1px solid rgba(255, 255, 255, 0.72);
    border-radius: 30px;
    background: rgba(255, 255, 255, 0.72);
    box-shadow: 0 24px 70px rgba(17, 97, 107, 0.10);
    backdrop-filter: blur(20px);
}

.mark {
    display: inline-flex;
    align-items: center;
    min-height: 42px;
    padding: 0 16px;
    color: white;
    font-weight: 900;
    letter-spacing: 0;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--mint), var(--primary));
}

h1 {
    margin: 24px 0 10px;
    font-size: clamp(40px, 8vw, 72px);
    line-height: 0.98;
    letter-spacing: 0;
}

.doc h1 {
    font-size: clamp(34px, 6vw, 56px);
}

h2 {
    margin-top: 42px;
    padding-top: 26px;
    border-top: 1px solid var(--line);
    font-size: 28px;
}

h3 {
    margin-top: 28px;
    font-size: 19px;
}

p,
li {
    color: var(--muted);
    font-size: 16px;
}

strong,
code {
    color: var(--ink);
}

code {
    padding: 2px 6px;
    border-radius: 7px;
    background: rgba(17, 97, 107, 0.08);
}

ul {
    padding-left: 1.25rem;
}

.cards {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    margin-top: 18px;
}

.card {
    display: flex;
    min-height: 138px;
    padding: 24px;
    color: var(--ink);
    text-decoration: none;
    flex-direction: column;
    justify-content: space-between;
    border: 1px solid var(--line);
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.78);
    box-shadow: 0 18px 46px rgba(17, 97, 107, 0.08);
}

.card span {
    font-size: 26px;
    font-weight: 900;
}

.card small {
    color: var(--primary);
    font-weight: 800;
}

.back {
    color: var(--primary);
    font-weight: 900;
    text-decoration: none;
}

.muted,
footer p {
    color: rgba(93, 118, 122, 0.74);
}

footer {
    margin-top: 24px;
}

@media (max-width: 640px) {
    .wrap,
    .doc {
        width: min(100% - 28px, 880px);
    }

    .wrap {
        padding-top: 38px;
    }

    .hero {
        padding: 28px;
        border-radius: 24px;
    }

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