:root {
  color-scheme: light;
  --bg: #f5f5f7;
  --card: #ffffff;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --line: #d2d2d7;
  --blue: #0071e3;
  --green: #18794e;
  --red: #c62828;
  --shadow: 0 10px 40px rgba(0, 0, 0, .08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", sans-serif;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 28px 16px;
}

.card {
  width: 100%;
  max-width: 440px;
  background: var(--card);
  border-radius: 20px;
  padding: 32px;
  box-shadow: var(--shadow);
}

.card.wide { max-width: 620px; }

h1 {
  margin: 0 0 6px;
  font-size: 27px;
  letter-spacing: -.4px;
}

.subtitle {
  color: var(--muted);
  margin-bottom: 24px;
  font-size: 15px;
  line-height: 1.5;
}

label {
  display: block;
  margin: 16px 0 7px;
  font-size: 14px;
  font-weight: 600;
}

label:first-of-type { margin-top: 0; }

input, select {
  width: 100%;
  padding: 12px 13px;
  border: 1px solid var(--line);
  border-radius: 10px;
  font-size: 16px;
  outline: none;
  background: #fff;
  color: var(--text);
}

input:focus, select:focus { border-color: var(--blue); }

button {
  width: 100%;
  margin-top: 18px;
  padding: 13px;
  border: 0;
  border-radius: 10px;
  background: var(--blue);
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
}

button:hover { opacity: .88; }
button:disabled { opacity: .55; cursor: default; }

button.secondary {
  background: #e8e8ed;
  color: var(--text);
  margin-top: 10px;
}

button.copy {
  width: auto;
  margin: 0 0 0 8px;
  padding: 6px 12px;
  font-size: 13px;
  border-radius: 8px;
  background: #e8e8ed;
  color: var(--text);
}

.error, .ok {
  display: none;
  margin: 0 0 16px;
  padding: 11px 12px;
  border-radius: 9px;
  font-size: 14px;
  line-height: 1.5;
  word-break: break-word;
}

.error { background: #ffebe9; color: var(--red); }
.ok { background: #e8f8ee; color: var(--green); }

.muted { color: var(--muted); font-size: 13px; line-height: 1.6; }

.link {
  margin-top: 20px;
  text-align: center;
  font-size: 14px;
  color: var(--muted);
}

.link a { color: var(--blue); text-decoration: none; }

.field-row {
  display: flex;
  align-items: center;
  gap: 6px;
}

.field-row input {
  flex: 1;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 14px;
}

.kv {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px;
  margin: 14px 0;
  background: #fbfbfd;
}

.kv .k {
  font-size: 12px;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: .3px;
  text-transform: uppercase;
  margin-bottom: 5px;
}

.kv .v {
  font-size: 14px;
  line-height: 1.5;
  word-break: break-all;
}

.kv .v.mono {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 22px 0;
}

.captcha {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 4px;
}

.captcha .q {
  padding: 10px 14px;
  background: var(--bg);
  border-radius: 10px;
  font-size: 17px;
  font-weight: 700;
  white-space: nowrap;
}

.captcha input { margin: 0; }

.admin-card { max-width: 1180px; }
.admin-toolbar { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin: 18px 0; }
.admin-card h2 { margin-top: 30px; }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 10px; }
.admin-card table { width: 100%; border-collapse: collapse; font-size: 14px; }
.admin-card th, .admin-card td { padding: 10px; border-bottom: 1px solid var(--line); text-align: left; white-space: nowrap; }
.admin-card th { background: #f6f7f9; }
.admin-card td button { width: auto; margin: 2px; padding: 7px 10px; }
.admin-card button.danger { background: var(--red); color: white; }
.admin-card [hidden] { display: none !important; }
@media (max-width: 700px) { .admin-toolbar { align-items: flex-start; flex-direction: column; } }