:root {
    --bg-blur: 8px;
    --text: #e7eef8;
    --muted: #b9c3d2;
    --line: rgba(255, 255, 255, 0.24);
    --shadow: 0 24px 45px rgba(0, 12, 38, 0.35);
    --radius-xl: 28px;
    --radius-lg: 20px;
    --radius-md: 14px;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    min-height: 100%;
}

body {
    font-family: Manrope, "Segoe UI", sans-serif;
    color: var(--text);
    background: #071824 url("../img/bg.jpg") center center / cover no-repeat fixed;
    line-height: 1.5;
}

.bg-overlay {
    position: fixed;
    inset: 0;
    z-index: 0;
    backdrop-filter: blur(var(--bg-blur));
    background:
        radial-gradient(circle at 10% 10%, rgba(42, 171, 238, 0.18), transparent 52%),
        radial-gradient(circle at 86% 22%, rgba(100, 214, 255, 0.12), transparent 52%),
        linear-gradient(160deg, rgba(4, 18, 34, 0.68), rgba(7, 18, 28, 0.80));
}

.layout {
    position: relative;
    z-index: 1;
    width: min(980px, calc(100% - 32px));
    margin: 26px auto 40px;
    display: grid;
    gap: 16px;
}

.card {
    border-radius: var(--radius-xl);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}

.glass {
    background: linear-gradient(130deg, rgba(255, 255, 255, 0.17), rgba(255, 255, 255, 0.08));
    backdrop-filter: blur(22px) saturate(130%);
    -webkit-backdrop-filter: blur(22px) saturate(130%);
}

.hero {
    padding: 24px;
}

.eyebrow {
    margin: 0;
    color: #64d6ff;
    text-transform: uppercase;
    font-size: 12px;
    letter-spacing: 0.16em;
    font-weight: 700;
}

h1,
h2,
h3 {
    margin: 0;
    font-family: Unbounded, Manrope, sans-serif;
    letter-spacing: 0.02em;
}

h1 {
    margin-top: 8px;
    font-size: clamp(1.6rem, 4vw, 2.3rem);
}

.subtitle {
    margin: 10px 0 0;
    color: #d6e2f2;
}

.back-link {
    margin-top: 14px;
    display: inline-flex;
    align-items: center;
    padding: 7px 14px;
    border-radius: 999px;
    border: 1px solid rgba(100, 214, 255, 0.42);
    background: linear-gradient(130deg, rgba(42, 171, 238, 0.24), rgba(100, 214, 255, 0.16));
    color: #eaf7ff;
    text-decoration: none;
    font-weight: 700;
}

.back-link:hover {
    background: linear-gradient(130deg, rgba(42, 171, 238, 0.36), rgba(130, 228, 255, 0.26));
}

.section {
    padding: 20px;
}

.section h2 {
    font-size: clamp(1rem, 3vw, 1.25rem);
    margin-bottom: 8px;
}

.section-desc {
    margin: 0 0 14px;
    color: var(--muted);
    font-size: 0.95rem;
}

.steps {
    display: grid;
    gap: 12px;
}

.step {
    display: grid;
    grid-template-columns: 36px 1fr;
    gap: 12px;
    align-items: start;
    padding: 12px;
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.16);
    background: rgba(255, 255, 255, 0.06);
}

.step-num {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: grid;
    place-items: center;
    font-weight: 800;
    background: rgba(42, 171, 238, 0.28);
    color: #c8ecff;
}

.step h3 {
    font-size: 1rem;
}

.step p {
    margin: 8px 0 0;
    color: #d5ddeb;
}

.action-link {
    margin-top: 10px;
    display: inline-block;
    text-decoration: none;
    color: #64d6ff;
    font-weight: 700;
}

.action-link:hover {
    text-decoration: underline;
}

.note {
    margin-top: 10px;
    padding: 8px 10px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.22);
    background: rgba(4, 9, 22, 0.35);
}

code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.95em;
}

.bullet-list,
.ordered-list {
    margin: 0;
    padding-left: 20px;
    color: #d5ddeb;
}

.bullet-list li,
.ordered-list li {
    margin: 8px 0;
}

.dns-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.dns-card {
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.16);
    background: rgba(255, 255, 255, 0.06);
    padding: 12px;
}

.dns-card h3 {
    font-size: 1rem;
}

.dns-card p {
    margin: 8px 0 0;
    color: #d5ddeb;
}

@media (max-width: 900px) {
    .layout {
        width: min(860px, calc(100% - 24px));
    }

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

@media (max-width: 760px) {
    .layout {
        margin-top: 16px;
        gap: 12px;
    }

    .hero,
    .section {
        padding: 14px;
    }

    .card {
        border-radius: 22px;
    }

    .step {
        grid-template-columns: 30px 1fr;
        gap: 10px;
        padding: 10px;
    }

    .step-num {
        width: 30px;
        height: 30px;
        border-radius: 8px;
        font-size: 13px;
    }
}