:root {
  color-scheme: dark;
  --bg: #07111f;
  --panel: rgba(16, 33, 55, .84);
  --panel-soft: rgba(13, 28, 47, .58);
  --stroke: rgba(179, 204, 232, .17);
  --text: #eff7ff;
  --muted: #a0b2c7;
  --blue: #59aaff;
  --green: #50d89a;
  --amber: #ffc76a;
  --red: #ff8d99;
}
* { box-sizing: border-box; }
body { margin: 0; min-width: 320px; color: var(--text); font: 16px/1.5 Inter, "Microsoft YaHei", system-ui, sans-serif; background: radial-gradient(circle at 18% 8%, #123d69 0, transparent 31rem), radial-gradient(circle at 92% 80%, #163f4e 0, transparent 28rem), var(--bg); }
.shell { width: min(940px, calc(100% - 32px)); margin: 0 auto; padding: 10vh 0 64px; }
.hero { text-align: center; }
.eyebrow { margin: 0 0 14px; letter-spacing: .2em; color: var(--blue); font-size: .75rem; font-weight: 800; }
h1 { max-width: 780px; margin: 0 auto; font-size: clamp(2.35rem, 7vw, 4.9rem); line-height: 1.08; letter-spacing: -.045em; }
.subtitle { max-width: 700px; margin: 22px auto 30px; color: var(--muted); font-size: 1.08rem; }
.search-box { display: flex; gap: 10px; padding: 8px; max-width: 760px; margin: 0 auto; border: 1px solid var(--stroke); border-radius: 17px; background: rgba(9, 23, 40, .76); box-shadow: 0 25px 55px rgba(0, 0, 0, .23); }
input[type="text"] { min-width: 0; flex: 1; border: 0; outline: 0; padding: 14px 16px; border-radius: 11px; color: var(--text); background: transparent; font: inherit; font-size: 1.1rem; }
input::placeholder { color: #73869d; }
button { border: 0; border-radius: 11px; padding: 14px 22px; cursor: pointer; color: #05111f; background: var(--blue); font: inherit; font-weight: 800; white-space: nowrap; transition: transform .18s ease, opacity .18s ease; }
button:hover { transform: translateY(-1px); }
button:disabled { cursor: wait; opacity: .62; transform: none; }
.hint { margin: 14px 0 0; color: #7f94ab; font-size: .84rem; }
code { padding: .1em .34em; border-radius: 4px; color: #c9e6ff; background: rgba(145, 193, 239, .1); }
.extension-panel { max-width: 760px; margin: 20px auto 0; padding: 20px; text-align: left; border: 1px solid var(--stroke); border-radius: 17px; background: var(--panel-soft); }
.extension-heading { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.extension-heading h2 { margin: 0; font-size: 1rem; }
.extension-heading p { margin: 2px 0 0; color: var(--muted); font-size: .8rem; }
.other-heading { margin-top: 23px; padding-top: 19px; border-top: 1px solid var(--stroke); }
.link-button { padding: 3px 0; color: var(--blue); background: transparent; font-size: .8rem; font-weight: 700; }
.extension-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 9px; margin-top: 12px; }
.extension-option { display: flex; align-items: center; gap: 7px; min-height: 42px; padding: 8px 10px; border: 1px solid var(--stroke); border-radius: 9px; cursor: pointer; color: #c2d1e1; background: rgba(3, 13, 25, .35); transition: border-color .18s ease, background .18s ease; }
.extension-option:hover, .extension-option:has(input:checked) { border-color: rgba(89, 170, 255, .75); background: rgba(49, 111, 176, .22); }
.extension-option.priority:has(input:checked) { border-color: rgba(80, 216, 154, .75); background: rgba(49, 151, 111, .18); }
.extension-option input { accent-color: var(--blue); }
.extension-option span { font-weight: 800; }
.extension-option small { margin-left: auto; color: var(--green); font-size: .64rem; }
.result { max-width: 760px; margin: 30px auto 0; border: 1px solid var(--stroke); border-radius: 17px; background: var(--panel); }
.result.hidden { display: none; }
.result-icon { display: grid; flex: 0 0 48px; width: 48px; height: 48px; place-items: center; border-radius: 50%; color: #062a1b; background: var(--green); font-size: 1.45rem; font-weight: 900; }
.result-icon.success { color: #062a1b; background: var(--green); }
.result.error { display: flex; gap: 18px; align-items: center; padding: 24px; }
.result.error .result-icon { color: #410b16; background: var(--red); }
.result-content h2 { margin: 0; font-size: 1.25rem; }
.result-content p { margin: 3px 0 0; color: var(--muted); }
.batch-result { padding: 22px; }
.batch-summary { display: flex; gap: 18px; align-items: center; padding-bottom: 19px; border-bottom: 1px solid var(--stroke); }
.result-group { margin-top: 21px; }
.group-heading { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 10px; }
.group-heading h3 { margin: 0; font-size: 1rem; }
.group-heading h3 b { color: var(--blue); }
.group-heading span { font-size: .68rem; font-weight: 800; letter-spacing: .08em; }
.group-good { color: var(--green); }
.group-warn { color: var(--amber); }
.group-uncertain { color: var(--blue); }
.group-unsupported { color: #c58cff; }
.group-bad { color: var(--red); }
.group-note { margin: -3px 0 9px; color: var(--muted); font-size: .8rem; }
.domain-card { display: flex; align-items: center; justify-content: space-between; gap: 15px; margin-top: 8px; padding: 13px 14px; border: 1px solid var(--stroke); border-radius: 10px; background: rgba(5, 17, 30, .43); }
.domain-card.is-available { border-color: rgba(80, 216, 154, .34); }
.domain-card.is-unavailable { border-color: rgba(255, 199, 106, .22); }
.domain-card.is-uncertain { border-color: rgba(89, 170, 255, .34); }
.domain-card.is-unsupported { border-color: rgba(197, 140, 255, .34); }
.domain-card-main { display: flex; align-items: center; gap: 10px; min-width: 0; }
.domain-card-main strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.status-label { color: var(--muted); font-size: .8rem; }
.is-available .status-label { color: var(--green); }
.is-unavailable .status-label { color: var(--amber); }
.is-uncertain .status-label { color: var(--blue); }
.is-unsupported .status-label { color: #c58cff; }
.domain-card-meta { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 7px; color: #b5c8dc; font-size: .75rem; text-align: right; }
.domain-card-meta span { padding: 3px 8px; border: 1px solid var(--stroke); border-radius: 999px; }
.notes { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin-top: 48px; }
.notes article { padding: 20px; border: 1px solid var(--stroke); border-radius: 14px; background: rgba(13, 28, 47, .48); }
.notes h2 { margin: 0 0 7px; font-size: .95rem; }
.notes p { margin: 0; color: var(--muted); font-size: .89rem; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
@media (max-width: 620px) { .shell { padding-top: 7vh; } .search-box { padding: 6px; flex-direction: column; } button { width: 100%; } .extension-grid { grid-template-columns: repeat(3, 1fr); } .extension-heading { align-items: flex-start; } .notes { grid-template-columns: 1fr; } .domain-card { align-items: flex-start; flex-direction: column; } .domain-card-meta { justify-content: flex-start; text-align: left; } }
@media (max-width: 430px) { .extension-grid { grid-template-columns: repeat(2, 1fr); } }