:root {
  --bg: #ffffff;
  --bg-alt: #f3f6fc;
  --card: #ffffff;
  --ink: #0b1a3a;
  --ink-2: #4a5878;
  --line: #e1e7f2;
  --blue: #1f4bff;
  --blue-ink: #ffffff;
  --teal: #12d6b5;
  --ok: #0e9f6e;
  --warn: #b7791f;
  --bad: #d64545;
  --term-bg: #0b1a3a;
  --term-ink: #dfe7ff;
  --term-dim: #7f8fb8;
  --shadow: 0 1px 2px rgb(11 26 58 / 6%), 0 8px 24px rgb(11 26 58 / 6%);
  --radius: 16px;
  --sans: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #070f24;
    --bg-alt: #0b1630;
    --card: #0e1a38;
    --ink: #eef2ff;
    --ink-2: #a8b4d3;
    --line: #1d2b4f;
    --blue: #5577ff;
    --teal: #2ee6c6;
    --ok: #34d399;
    --warn: #f6c453;
    --bad: #f87171;
    --term-bg: #040a19;
    --shadow: 0 1px 2px rgb(0 0 0 / 30%), 0 8px 24px rgb(0 0 0 / 25%);
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 17px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--blue); }
code, pre { font-family: var(--mono); }
img { display: block; }

.wrap { width: 100%; max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.wrap.narrow { max-width: 760px; }
@media (max-width: 520px) { .wrap { padding: 0 16px; } }

.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: -999px; top: 8px; z-index: 10; background: var(--blue); color: var(--blue-ink); padding: 8px 14px; border-radius: 8px; }
.skip:focus { left: 8px; }

:focus-visible { outline: 3px solid var(--teal); outline-offset: 2px; border-radius: 6px; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px; min-height: 48px; padding: 0 24px;
  border: 2px solid transparent; border-radius: 999px;
  font: 600 16px/1 var(--sans); text-decoration: none; cursor: pointer;
  transition: transform .15s ease, background-color .15s ease, border-color .15s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--blue); color: var(--blue-ink); }
.btn-primary:hover { background: color-mix(in srgb, var(--blue) 86%, #000); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--blue); color: var(--blue); }
.btn-small { min-height: 38px; padding: 0 16px; font-size: 14px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 5;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 16px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-size: 20px; letter-spacing: -.01em; }
.brand strong { font-weight: 800; }
.nav { display: flex; align-items: center; gap: 28px; }
.nav a:not(.btn) { color: var(--ink-2); text-decoration: none; font-weight: 500; font-size: 15px; }
.nav a:not(.btn):hover { color: var(--ink); }
@media (max-width: 760px) { .nav a:not(.btn) { display: none; } }

/* Hero */
.hero { position: relative; overflow: hidden; padding: 88px 0 56px; }
.rings {
  position: absolute; inset: 0; pointer-events: none;
  background:
    repeating-radial-gradient(circle at 0% 100%, transparent 0 58px, color-mix(in srgb, var(--blue) 10%, transparent) 58px 60px),
    radial-gradient(60% 70% at 85% 10%, color-mix(in srgb, var(--teal) 16%, transparent), transparent 70%);
  -webkit-mask-image: linear-gradient(to bottom, #000 40%, transparent);
          mask-image: linear-gradient(to bottom, #000 40%, transparent);
}
.hero-inner { position: relative; display: grid; grid-template-columns: 1.15fr 1fr; gap: 56px; align-items: center; }
/* Grid items default to min-width:auto; the terminal's long lines would
   otherwise widen the column past the viewport on phones. */
.hero-inner > * { min-width: 0; }
@media (max-width: 900px) { .hero-inner { grid-template-columns: 1fr; gap: 40px; } .hero { padding-top: 56px; } }

.eyebrow { margin: 0 0 12px; color: var(--blue); font: 700 13px/1 var(--sans); letter-spacing: .14em; text-transform: uppercase; }
.display { margin: 0; font-size: clamp(64px, 11vw, 136px); line-height: .95; font-weight: 900; letter-spacing: -.045em; }
.grad { background: linear-gradient(100deg, var(--blue) 10%, var(--teal) 95%); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lede { max-width: 560px; margin: 24px 0 0; color: var(--ink-2); font-size: clamp(19px, 2.2vw, 23px); line-height: 1.45; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 36px; }

.terminal { margin: 0; background: var(--term-bg); color: var(--term-ink); border-radius: var(--radius); box-shadow: 0 30px 60px -20px rgb(11 26 58 / 45%); overflow: hidden; }
.terminal-bar { display: flex; gap: 8px; padding: 14px 16px; border-bottom: 1px solid rgb(255 255 255 / 8%); }
.terminal-bar i { width: 12px; height: 12px; border-radius: 50%; background: rgb(255 255 255 / 18%); }
.terminal pre { margin: 0; padding: 22px 24px 26px; overflow-x: auto; font-size: 15px; line-height: 1.75; }
.terminal .prompt { color: var(--teal); user-select: none; }
.caret { display: inline-block; width: 9px; height: 1.1em; vertical-align: -3px; background: var(--term-ink); animation: blink 1.1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
@media (prefers-reduced-motion: reduce) { .caret { animation: none; } }

.facts { position: relative; display: grid; grid-template-columns: repeat(4, 1fr); margin: 64px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.facts li { padding: 24px 8px 0; }
.facts strong { display: block; font-size: clamp(26px, 3.4vw, 38px); font-weight: 800; letter-spacing: -.02em; }
.facts span { color: var(--ink-2); font-size: 15px; }
@media (max-width: 620px) { .facts { grid-template-columns: repeat(2, 1fr); row-gap: 8px; } }

/* Sections */
.section { padding: 96px 0; }
.section-alt { background: var(--bg-alt); }
@media (max-width: 620px) { .section { padding: 64px 0; } }
.section-head { margin-bottom: 40px; }
.section-head h2 { margin: 0; font-size: clamp(34px, 5vw, 52px); line-height: 1.05; font-weight: 800; letter-spacing: -.03em; }
.section-head p { max-width: 620px; margin: 14px 0 0; color: var(--ink-2); font-size: 19px; }
.section-head .btn { margin-top: 20px; }
.section-head.center { text-align: center; }
.section-head.center p { margin-left: auto; margin-right: auto; }

/* Nameserver cards */
.ns-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
@media (max-width: 760px) { .ns-grid { grid-template-columns: minmax(0, 1fr); } }
.ns-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); transition: transform .2s ease, border-color .2s ease; }
.ns-card:hover { transform: translateY(-3px); border-color: color-mix(in srgb, var(--blue) 40%, var(--line)); }
.ns-card header { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
.ns-card h3 { margin: 0; min-width: 0; font-size: 28px; font-weight: 800; letter-spacing: -.02em; line-height: 1.1; overflow-wrap: anywhere; }
.ns-card h3 span { display: block; margin-top: 4px; color: var(--ink-2); font: 500 14px/1.3 var(--mono); letter-spacing: 0; }
.namesake { margin: 10px 0 18px; color: var(--ink-2); font-size: 14px; }
.ns-card dl { margin: 0; display: grid; gap: 10px; }
.ns-card dl > div { display: grid; grid-template-columns: 44px 1fr; align-items: center; gap: 8px; padding-top: 10px; border-top: 1px solid var(--line); }
.ns-card dt { color: var(--blue); font: 700 12px/1 var(--sans); letter-spacing: .08em; }
.ns-card dd { margin: 0; display: flex; align-items: center; justify-content: space-between; gap: 8px; min-width: 0; }
.ns-card dd code { font-size: 15px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.copy {
  flex: none; padding: 5px 10px;
  border: 1px solid var(--line); border-radius: 8px;
  background: transparent; color: var(--ink-2);
  font: 600 12px/1 var(--sans); cursor: pointer;
}
.copy:hover { color: var(--blue); border-color: var(--blue); }
.copy.copied { color: var(--ok); border-color: var(--ok); }

.callout { margin-top: 28px; padding: 18px 22px; border-radius: 12px; border: 1px solid color-mix(in srgb, var(--warn) 40%, var(--line)); background: color-mix(in srgb, var(--warn) 9%, var(--card)); color: var(--ink); font-size: 16px; }

/* Features */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 900px) { .features { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .features { grid-template-columns: 1fr; } }
.feature { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; }
.feature h3 { margin: 18px 0 8px; font-size: 21px; font-weight: 700; letter-spacing: -.01em; }
.feature p { margin: 0; color: var(--ink-2); font-size: 16px; }
.icon { display: grid; place-items: center; width: 48px; height: 48px; border-radius: 14px; background: linear-gradient(135deg, var(--blue), var(--teal)); }
.icon svg { width: 24px; height: 24px; fill: none; stroke: #fff; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

/* Tabs */
.tabs { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
.tablist { display: flex; gap: 4px; padding: 8px; border-bottom: 1px solid var(--line); overflow-x: auto; background: var(--bg-alt); }
.tablist [role="tab"] {
  flex: none; padding: 10px 18px; border: 0; border-radius: 10px;
  background: transparent; color: var(--ink-2);
  font: 600 15px/1 var(--sans); cursor: pointer; white-space: nowrap;
}
.tablist [role="tab"]:hover { color: var(--ink); }
.tablist [role="tab"][aria-selected="true"] { background: var(--card); color: var(--blue); box-shadow: var(--shadow); }
.tabpanel { padding: 32px; }
@media (max-width: 520px) { .tabpanel { padding: 22px 18px; } }
.tabpanel > p { margin: 0 0 18px; color: var(--ink-2); }
.tabpanel p code { font-size: .92em; }

.steps { margin: 0; padding: 0; list-style: none; counter-reset: step; display: grid; gap: 22px; }
.steps > li { position: relative; padding-left: 52px; color: var(--ink-2); }
.steps > li strong { color: var(--ink); }
.steps > li::before {
  counter-increment: step; content: counter(step);
  position: absolute; left: 0; top: -2px;
  display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%;
  background: color-mix(in srgb, var(--blue) 12%, transparent); color: var(--blue); font-weight: 800;
}
.mono-list { margin: 12px 0 0; padding: 14px 18px; list-style: none; background: var(--bg-alt); border-radius: 10px; font: 500 15px/1.9 var(--mono); color: var(--ink); overflow-x: auto; }

.code { position: relative; }
.code pre { margin: 0; padding: 22px 24px; background: var(--term-bg); color: var(--term-ink); border-radius: 12px; overflow-x: auto; font-size: 14.5px; line-height: 1.7; }
.code .copy { position: absolute; top: 12px; right: 12px; color: var(--term-dim); border-color: rgb(255 255 255 / 15%); background: var(--term-bg); }
.code .copy:hover { color: #fff; border-color: rgb(255 255 255 / 40%); }

/* Checker */
.checker { display: flex; gap: 10px; padding: 8px; background: var(--card); border: 1px solid var(--line); border-radius: 999px; box-shadow: var(--shadow); }
.checker input {
  flex: 1; min-width: 0; padding: 0 18px; border: 0; background: transparent; color: var(--ink);
  font: 500 18px/1 var(--mono);
}
.checker input:focus { outline: none; }
.checker:focus-within { border-color: var(--blue); }
@media (max-width: 460px) {
  .checker { flex-direction: column; border-radius: 18px; }
  .checker input { min-height: 48px; }
}

.result { margin-top: 20px; padding: 22px 24px; background: var(--card); border: 1px solid var(--line); border-left-width: 5px; border-radius: 12px; }
.result.ok { border-left-color: var(--ok); }
.result.warn { border-left-color: var(--warn); }
.result.bad { border-left-color: var(--bad); }
.result h3 { margin: 0 0 6px; font-size: 19px; }
.result p { margin: 0; color: var(--ink-2); font-size: 16px; }
.result ul { margin: 14px 0 0; padding: 0; list-style: none; font: 500 14.5px/1.9 var(--mono); }
.result li { display: flex; gap: 10px; overflow-wrap: anywhere; }
.result li::before { content: "✓"; color: var(--ok); font-weight: 700; }
.result li.other::before { content: "✕"; color: var(--bad); }
.fineprint { margin: 16px 0 0; text-align: center; color: var(--ink-2); font-size: 14px; }

/* FAQ */
.faq { display: grid; gap: 12px; }
.faq details { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 0 22px; }
.faq summary { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 20px 0; cursor: pointer; list-style: none; font-weight: 700; font-size: 18px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; flex: none; color: var(--blue); font-size: 26px; font-weight: 400; line-height: 1; transition: transform .2s ease; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { margin: 0 0 20px; color: var(--ink-2); }

/* Footer */
.site-footer { background: #0b1a3a; color: #c5cfea; padding: 56px 0 28px; }
.site-footer .brand { color: #fff; }
.footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 32px; }
.footer-inner p { margin: 12px 0 0; font-size: 15px; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 12px 28px; align-items: flex-start; }
.site-footer nav a { color: #c5cfea; text-decoration: none; font-size: 15px; }
.site-footer nav a:hover { color: #fff; }
.legal { margin-top: 40px; padding-top: 22px; border-top: 1px solid rgb(255 255 255 / 10%); font-size: 13px; color: #8d9ac0; }

/* 404 */
.notfound { min-height: 100vh; display: grid; place-content: center; justify-items: start; gap: 4px; padding: 24px; max-width: 640px; margin: 0 auto; }
.notfound h1 { margin: 0; font-size: clamp(40px, 7vw, 64px); line-height: 1.05; letter-spacing: -.03em; }
.notfound .btn { margin-top: 28px; }