:root {
  --bg: #f4f6f5;
  --card: #ffffff;
  --tx: #16211d;
  --mut: #5f6f69;
  --bd: #dfe6e2;
  --pri: #176b4d;
  --pri-dark: #12573e;
  --ok: #1a7f4b;
  --ok-bg: #e6f4ec;
  --bad: #b42318;
  --bad-bg: #fdecea;
  --radius: 12px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--tx);
  font-size: 15px;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--pri); text-decoration: none; }
a:hover { text-decoration: underline; }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 20px;
  background: #fff;
  border-bottom: 1px solid var(--bd);
  flex-wrap: wrap;
}

.brand { display: flex; align-items: center; gap: 10px; color: var(--tx); }
.brand:hover { text-decoration: none; }
.brand-mark {
  width: 32px; height: 32px; border-radius: 9px;
  background: var(--pri); color: #fff;
  display: grid; place-items: center;
  font-weight: 700;
}
.brand strong { display: block; font-size: 15px; }
.brand small { display: block; font-size: 12px; color: var(--mut); }

.topnav { display: flex; align-items: center; gap: 14px; font-size: 14px; flex-wrap: wrap; }
.topnav .inline { display: inline; }

main { flex: 1; width: 100%; padding: 28px 16px 40px; }
main.narrow { max-width: 460px; margin: 0 auto; }
main.wide { max-width: 1080px; margin: 0 auto; }

.card {
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: var(--radius);
  padding: 22px 24px;
  margin-bottom: 18px;
  box-shadow: 0 1px 2px rgba(16, 40, 30, .04);
}

.auth-card { margin-top: 18px; }

h1 { font-size: 22px; margin-bottom: 6px; }
h2 { font-size: 16px; margin: 4px 0 12px; }
p { margin-bottom: 10px; }
.muted { color: var(--mut); }
.hint { color: var(--mut); font-size: 13px; margin-top: 4px; }

.stack { display: flex; flex-direction: column; gap: 12px; margin-top: 14px; }
label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--mut); }

input[type="text"], input[type="email"], input[type="password"], input[type="number"] {
  font: inherit;
  color: var(--tx);
  padding: 9px 12px;
  border: 1px solid var(--bd);
  border-radius: 9px;
  background: #fff;
  width: 100%;
}
input:focus { outline: 2px solid rgba(23, 107, 77, .25); border-color: var(--pri); }

button { font: inherit; cursor: pointer; }
.primary {
  background: var(--pri);
  color: #fff;
  border: none;
  border-radius: 9px;
  padding: 10px 16px;
  font-weight: 600;
}
.primary:hover { background: var(--pri-dark); }
.link-btn { display: inline-block; }
.linkbtn {
  border: none; background: none; color: var(--pri);
  padding: 0; font-size: 13px; text-decoration: underline;
}
.linkbtn:disabled { color: var(--mut); cursor: default; text-decoration: none; }

.flash { border-radius: 9px; padding: 10px 14px; font-size: 14px; margin: 12px 0; }
.flash-bad { background: var(--bad-bg); color: var(--bad); }
.flash-ok { background: var(--ok-bg); color: var(--ok); }
.secret {
  display: inline-block; margin-top: 6px; padding: 4px 8px;
  background: #fff; border: 1px dashed var(--ok); border-radius: 6px;
  font-family: ui-monospace, Consolas, monospace;
  word-break: break-all;
}

.kv { display: grid; grid-template-columns: 96px 1fr; gap: 6px 12px; font-size: 14px; }
.kv dt { color: var(--mut); }

.grid { width: 100%; border-collapse: collapse; font-size: 13px; margin-top: 8px; }
.grid th, .grid td { text-align: left; padding: 7px 8px; border-bottom: 1px solid var(--bd); }
.grid th { color: var(--mut); font-weight: 600; white-space: nowrap; }
.grid td.actions { display: flex; gap: 10px; flex-wrap: wrap; }
.grid code { font-size: 12px; }

.badge { border-radius: 6px; padding: 1px 8px; font-size: 12px; }
.badge.ok { background: var(--ok-bg); color: var(--ok); }
.badge.bad { background: var(--bad-bg); color: var(--bad); }

.rowform { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin: 10px 0; }
.rowform input[type="text"] { flex: 1 1 200px; min-width: 150px; }
.rowform input[type="number"] { width: 90px; }

/* invite copy helpers */
.invite-created {
  margin: 14px 0;
  padding: 14px 18px;
  border: 1px solid #b9dfc9;
  border-radius: 10px;
  background: #f6fcf8;
}
.invite-title { font-weight: 700; color: var(--ok); margin-bottom: 2px; }
.copyrow { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-top: 10px; }
.copyrow .lab { color: var(--mut); font-size: 12px; min-width: 56px; }
.copyable {
  padding: 3px 8px;
  border: 1px dashed var(--bd);
  border-radius: 6px;
  background: #fff;
  font-family: ui-monospace, Consolas, monospace;
  font-size: 13px;
  word-break: break-all;
  user-select: all;
}
.primary.small { padding: 6px 12px; font-size: 13px; }
button.copied { background: var(--ok) !important; }

/* links styled as buttons */
.link-btn { display: inline-block; text-decoration: none; }
.ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 14px;
  border: 1px solid var(--bd);
  border-radius: 9px;
  color: var(--pri);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
}
.ghost:hover { border-color: var(--pri); text-decoration: none; }
.cta-row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 18px; }

footer {
  display: flex; justify-content: space-between;
  padding: 16px 20px; font-size: 12px; color: var(--mut);
  border-top: 1px solid var(--bd); background: #fff;
}

@media (max-width: 640px) {
  .card { padding: 18px; }
  .grid { display: block; overflow-x: auto; white-space: nowrap; }
}