:root {
  --bg: #f4f4f5;
  --card: #ffffff;
  --text: #18181b;
  --muted: #71717a;
  --line: #e4e4e7;
  --brand: #e50914;
  --brand-dark: #b20710;
  --ok: #15803d;
  --warn: #b45309;
  --error: #b91c1c;
  --radius: 12px;
  color-scheme: light;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
}

.top {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: #141414;
  color: #fff;
}
.logo {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background: var(--brand);
  font-weight: 800;
}
.top-title { font-weight: 600; }
.top-right { margin-left: auto; color: #fff !important; }

.wrap { max-width: 560px; margin: 0 auto; padding: 16px; }
.wrap.wide { max-width: 1280px; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 14px;
}
.card.narrow { max-width: 420px; margin: 40px auto; }
h2 { font-size: 16px; margin: 0 0 6px; }
h3 { margin-top: 0; }
label { display: block; font-weight: 600; margin-bottom: 6px; }

.row { display: flex; gap: 8px; align-items: center; }
.row.between { justify-content: space-between; }
.wrap-row { flex-wrap: wrap; }

input, select {
  flex: 1;
  min-width: 0;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font: inherit;
  background: #fff;
}
#code-input { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: 1px; text-transform: uppercase; }
input:focus, select:focus { outline: 2px solid #fca5a5; border-color: var(--brand); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--text);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
}
.btn:disabled { opacity: .55; cursor: default; }
.btn.primary { background: var(--brand); border-color: var(--brand); color: #fff; }
.btn.primary:hover:not(:disabled) { background: var(--brand-dark); }
.btn.block { display: flex; width: 100%; margin-top: 8px; }

.link-btn {
  border: 0;
  background: none;
  color: #2563eb;
  cursor: pointer;
  font: inherit;
  font-size: 13px;
  padding: 2px 6px;
}
.link-btn.danger { color: var(--error); }

.msg { margin: 10px 0 0; font-size: 14px; }
.msg.error { color: var(--error); }
.msg.warn { color: var(--warn); }
.msg.ok { color: var(--ok); }
.hint, .sub { color: var(--muted); font-size: 13px; margin: 6px 0 0; }
.sub { color: var(--text); font-size: 15px; font-weight: 600; }

.kv > div {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px dashed var(--line);
}
.kv > div:last-child { border-bottom: 0; }
.k { width: 40px; flex: none; color: var(--muted); font-size: 13px; }
.v { flex: 1; min-width: 0; overflow-wrap: anywhere; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }

.meter { height: 6px; border-radius: 3px; background: var(--line); margin-top: 10px; overflow: hidden; }
.meter span { display: block; height: 100%; background: var(--ok); transition: width .3s; }
#login-card.closed .meter span { background: var(--muted); }

.mail { border-top: 1px solid var(--line); padding: 12px 0 4px; }
.mail-head { display: flex; justify-content: space-between; font-size: 14px; }
.mail-head span { color: var(--muted); font-size: 13px; }
.code {
  display: block;
  width: 100%;
  margin-top: 8px;
  padding: 12px;
  border: 1px dashed var(--brand);
  border-radius: 8px;
  background: #fef2f2;
  color: var(--brand-dark);
  font: 700 28px/1.2 ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: 6px;
  cursor: pointer;
}

.help ol { margin: 0; padding-left: 20px; font-size: 14px; }
.help li { margin: 6px 0; }

/* 管理后台 */
.table-card { padding: 0; overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { padding: 10px 12px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { background: #fafafa; font-size: 13px; color: var(--muted); font-weight: 600; white-space: nowrap; }
tr.dim td { background: #fafafa; color: var(--muted); }
.small { font-size: 12px; }
.muted { color: var(--muted); }
.strong { font-weight: 600; }
.warn-text { color: var(--warn); }
td.ops { white-space: nowrap; }
#search { min-width: 240px; }
#filter { flex: none; }
dialog { border: 1px solid var(--line); border-radius: var(--radius); max-width: 560px; width: calc(100% - 32px); }
dialog ul { padding-left: 18px; font-size: 13px; max-height: 60vh; overflow: auto; }

@media (max-width: 640px) {
  .row:not(.between) { flex-wrap: wrap; }
  .row:not(.between) .btn { flex: 1; }
}