:root {
  --bg: #f6f4ef;
  --bar: #fffdf9;
  --ink: #2c2c2a;
  --muted: #8a8178;
  --line: rgba(0, 0, 0, 0.1);
  --accent: #ff7a45;
  --accent-soft: #ffe9df;
  --tab: #f0ece4;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--ink);
}
#topbar {
  position: sticky; top: 0; z-index: 50;
  height: 56px; display: flex; align-items: center; gap: 18px;
  padding: 0 16px;
  background: var(--bar);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 1px 0 rgba(0,0,0,0.02);
}
.brand { display: flex; align-items: center; gap: 9px; font-weight: 600; font-size: 15px; }
.brand .dot { width: 14px; height: 14px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
.tabs { display: flex; gap: 8px; flex: 1; overflow-x: auto; }
.tab {
  border: 1px solid transparent; background: transparent; color: var(--muted);
  padding: 7px 14px; border-radius: 999px; font-size: 13px; cursor: pointer; white-space: nowrap;
  transition: all .15s ease;
}
.tab:hover { color: var(--ink); background: var(--tab); }
.tab.active { color: var(--accent); background: var(--accent-soft); border-color: rgba(255,122,69,0.3); font-weight: 600; }
.tab .badge { font-size: 10px; margin-left: 6px; padding: 1px 6px; border-radius: 999px; background: #eee; color: #999; }
#userbox { display: flex; align-items: center; gap: 10px; white-space: nowrap; }
#userbox .uname { font-size: 13px; color: var(--muted); }
#userbox button {
  border: 1px solid var(--line); background: #fff; color: var(--muted);
  padding: 5px 12px; border-radius: 999px; font-size: 12px; cursor: pointer;
}
#userbox button:hover { color: var(--accent); border-color: rgba(255,122,69,0.4); }
#userbox button.primary { background: var(--accent); color: #fff; border-color: var(--accent); font-weight: 600; }
#guestbar {
  display: flex; align-items: center; justify-content: center; gap: 10px;
  padding: 7px 14px; font-size: 12.5px; color: #8a5a3c;
  background: #fff4ec; border-bottom: 1px solid rgba(255,122,69,0.18);
}
#guestbar button {
  border: 0; background: var(--accent); color: #fff; padding: 4px 12px;
  border-radius: 999px; font-size: 12px; cursor: pointer; font-weight: 600;
}
#stage {
  display: block; width: 100%;
  height: calc(100vh - 56px);
  border: 0; background: var(--bg);
}
body.guest #stage { height: calc(100vh - 56px - 34px); }
@media (max-width: 520px) {
  .brand span.txt { display: none; }
  .tabs { gap: 6px; }
}

/* ===== 登录/注册 门 ===== */
.auth-overlay {
  position: fixed; inset: 0; z-index: 100;
  display: flex; align-items: center; justify-content: center;
  background: rgba(60, 40, 25, 0.35);
  padding: 20px;
}
.auth-card {
  position: relative;
  width: 100%; max-width: 340px;
  background: var(--bar); border: 1px solid var(--line); border-radius: 20px;
  padding: 28px 24px 22px; box-shadow: 0 12px 40px rgba(255,122,69,0.18);
}
#auth-close {
  position: absolute; top: 10px; right: 12px;
  border: 0; background: transparent; color: var(--muted);
  font-size: 22px; line-height: 1; cursor: pointer; padding: 2px 6px;
}
#auth-close:hover { color: var(--ink); }
.auth-card .brand.big { font-size: 20px; justify-content: center; }
.auth-sub { text-align: center; color: var(--muted); font-size: 12.5px; margin: 8px 0 18px; }
.auth-tabs { display: flex; gap: 8px; margin-bottom: 16px; }
.auth-tabs button {
  flex: 1; padding: 9px 0; border-radius: 12px; cursor: pointer;
  border: 1px solid var(--line); background: #fff; color: var(--muted); font-size: 14px;
}
.auth-tabs button.on { background: var(--accent); color: #fff; border-color: var(--accent); font-weight: 600; }
.auth-card input {
  width: 100%; margin-bottom: 12px; padding: 12px 14px; font-size: 14px;
  border: 1px solid var(--line); border-radius: 12px; background: #fffdf9; color: var(--ink);
  outline: none; transition: border-color .15s;
}
.auth-card input:focus { border-color: var(--accent); }
#code-row { display: flex; gap: 8px; }
#code-row input { flex: 1; letter-spacing: 3px; }
#code-row button {
  border: 1px solid var(--accent); background: var(--accent-soft); color: var(--accent);
  padding: 0 14px; border-radius: 12px; font-size: 13px; cursor: pointer; white-space: nowrap; font-weight: 600;
}
#code-row button:disabled { opacity: 0.5; cursor: not-allowed; }
.auth-card #au-submit {
  width: 100%; padding: 12px 0; border: 0; border-radius: 12px; cursor: pointer;
  background: var(--accent); color: #fff; font-size: 15px; font-weight: 700;
  transition: filter .15s;
}
.auth-card #au-submit:hover { filter: brightness(1.05); }
#au-msg { min-height: 18px; text-align: center; font-size: 12.5px; color: #e0483a; margin-top: 10px; }
#au-msg.ok { color: #2e9e5b; }
.auth-hint { text-align: center; color: var(--muted); font-size: 11px; margin-top: 6px; }