:root {
  color-scheme: light;
  font-family: system-ui, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: #142b29;
  background: #f7faf9;
  --accent: #086a58;
  --muted: #4c6460;
  --line: #d6e5e0;
}

* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; display: flex; flex-direction: column; line-height: 1.55; }
main { flex: 1; }
a { color: var(--accent); text-underline-offset: .2em; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: wait; opacity: .65; }
[hidden] { display: none !important; }
:focus-visible { outline: 3px solid #297fbb; outline-offset: 3px; }

.frame { width: min(100% - 2rem, 58rem); margin-inline: auto; }
.site-header { border-bottom: 1px solid var(--line); background: #fff; }
.header-inner { min-height: 4.25rem; display: flex; align-items: center; justify-content: space-between; gap: .25rem 1rem; flex-wrap: wrap; padding-block: .6rem; }
.brand { display: flex; align-items: center; gap: .55rem; font-weight: 800; letter-spacing: .035em; color: var(--accent); }
nav { display: flex; flex-wrap: wrap; gap: 0 1rem; }
nav a { display: inline-flex; align-items: center; min-height: 2.75rem; gap: .25rem; color: var(--muted); font-size: .82rem; text-decoration: none; }
nav a:hover { text-decoration: underline; }

.hero {
  margin-block: 1.5rem 2rem;
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: 1.35rem;
  background: radial-gradient(ellipse at top right, #d4eee3, transparent 70%), #edf6f2;
}
.badge { display: inline-flex; align-items: center; gap: .45rem; margin: 0; border: 1px solid #c6e4d8; border-radius: 2rem; padding: .25rem .7rem; background: #f6fcf8; color: var(--accent); font-weight: 700; font-size: .82rem; }
.badge span { width: .5rem; height: .5rem; border-radius: 50%; background: var(--accent); }
h1 { margin: .6rem 0 .3rem; font-size: clamp(1.75rem, 6.8vw, 3.25rem); line-height: 1.2; letter-spacing: -.025em; }
.intro { margin: 0 0 1.2rem; color: var(--muted); }
form { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: .5rem; max-width: 41rem; }
.search-field { display: flex; align-items: center; gap: .5rem; border: 1px solid #8bb3a8; padding-inline: .65rem; background: white; color: var(--accent); border-radius: .65rem; }
.search-field svg { flex: none; }
.search-field:focus-within { outline: 3px solid #297fbb; outline-offset: 2px; }
.search-field input { width: 100%; min-width: 0; min-height: 3.1rem; border: 0; padding: 0; color: inherit; background: transparent; outline: none; }
button { min-height: 2.75rem; padding: .4rem .75rem; border: 1px solid #b8d5cc; border-radius: .6rem; color: var(--accent); background: #fff; font-weight: 650; }
button:hover:not(:disabled) { background: #e4f3ed; }
.primary { min-width: 4.25rem; background: var(--accent); color: white; border-color: var(--accent); }
.primary:hover:not(:disabled) { background: #075244; }
.region-field { grid-column: 1 / -1; display: flex; align-items: center; flex-wrap: wrap; gap: .35rem .65rem; color: var(--muted); font-size: .88rem; }
.region-field select { min-height: 2.75rem; max-width: 100%; padding: .35rem .55rem; border: 1px solid #8bb3a8; border-radius: .6rem; background: #fff; color: var(--accent); }
.examples { display: flex; align-items: center; flex-wrap: wrap; gap: .4rem; margin-top: .85rem; color: var(--muted); font-size: .85rem; }
.examples span { margin-right: .2rem; }
.examples button { border-radius: 2rem; padding-inline: .65rem; }

.results h2 { margin: 0 0 .5rem; font-size: 1.3rem; }
.status { margin: 0 0 .8rem; color: var(--muted); overflow-wrap: anywhere; }
.status.panel { padding: 1rem; border: 1px dashed #b8d5cc; border-radius: .75rem; background: #fff; }
.status[data-state="error"] { color: #882d20; border-color: #ddaca4; }
#retry { margin-bottom: 1rem; }
.channel { padding: 1rem; margin: 0 0 .85rem; border: 1px solid var(--line); border-radius: 1rem; background: #fff; }
.channel summary { cursor: pointer; color: var(--accent); }
.channel-heading { display: inline-flex; gap: .4rem .7rem; align-items: center; flex-wrap: wrap; }
.channel-heading strong { font-size: 1.25rem; }
.match, .unchecked { color: var(--muted); background: #eef5f2; border-radius: 1rem; padding: .15rem .55rem; font-size: .78rem; }
.channel-meta { color: var(--muted); font-size: .88rem; }
.addresses { margin: .65rem 0 0; padding: 0; list-style: none; }
.address { padding: .7rem 0; border-top: 1px solid var(--line); }
.address-main { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: .6rem; align-items: start; }
.address code { color: #233c39; overflow-wrap: anywhere; user-select: text; font-size: .82rem; line-height: 1.6; }
.address button { min-width: 4rem; font-size: .85rem; }
.address-meta { display: flex; gap: .35rem .55rem; align-items: baseline; flex-wrap: wrap; margin: .35rem 0 0; color: var(--muted); font-size: .82rem; overflow-wrap: anywhere; }
.copy-feedback { display: block; margin: .25rem 0 0; color: var(--accent); font-size: .83rem; }
.copy-feedback:empty { margin: 0; }
.manual-copy { display: block; width: 100%; margin-top: .4rem; padding: .45rem; resize: vertical; border: 1px solid #8bb3a8; border-radius: .4rem; font-size: 1rem; overflow-wrap: anywhere; }
footer { display: flex; flex-wrap: wrap; gap: .25rem 1rem; justify-content: space-between; margin-top: 1.75rem; padding: 1rem 0 1.5rem; border-top: 1px solid var(--line); color: var(--muted); font-size: .8rem; }

@media (min-width: 42rem) {
  .frame { width: min(100% - 4rem, 58rem); }
  .hero { margin-block: 2.25rem; padding: 2.5rem; }
  .channel { padding: 1.2rem 1.4rem; }
  .search-field { padding-inline: .85rem; }
  .primary { min-width: 5.25rem; }
}