* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    background:
        radial-gradient(circle at 20% 10%, rgba(139, 92, 246, 0.22), transparent 32%),
        radial-gradient(circle at 80% 0%, rgba(34, 211, 238, 0.16), transparent 30%),
        #090916;
    color: #f8fafc;
    font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.65;
}

.wrap {
    width: min(860px, calc(100% - 32px));
    margin: 0 auto;
    padding: 36px 0 56px;
}

.top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 26px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #fff;
    font-weight: 800;
    text-decoration: none;
}

.mark {
    display: grid;
    place-items: center;
    width: 36px;
    height: 36px;
    border-radius: 12px;
    background: linear-gradient(135deg, #7c3aed, #22d3ee);
    box-shadow: 0 14px 36px rgba(124, 58, 237, 0.26);
}

.back {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 14px;
}

.doc {
    border: 1px solid rgba(255, 255, 255, 0.09);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.045);
    padding: 28px;
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.22);
}

h1 {
    margin: 0 0 8px;
    font-size: clamp(28px, 5vw, 42px);
    line-height: 1.1;
}

.muted {
    margin: 0 0 24px;
    color: rgba(255, 255, 255, 0.58);
}

h2 {
    margin: 28px 0 8px;
    font-size: 19px;
}

p, li {
    color: rgba(255, 255, 255, 0.78);
}

ul {
    padding-left: 20px;
}

a {
    color: #67e8f9;
}

.note {
    margin-top: 28px;
    padding: 14px 16px;
    border-radius: 12px;
    background: rgba(34, 211, 238, 0.08);
    color: rgba(255, 255, 255, 0.72);
}

@media (max-width: 560px) {
    .top {
        align-items: flex-start;
        flex-direction: column;
    }
    .doc {
        padding: 22px;
        border-radius: 14px;
    }
}