:root { --bg:#f5f7fa; --card:#fff; --primary:#2f6fed; --border:#e3e8ef; --text:#1f2933; --muted:#7b8794; }
* { box-sizing: border-box; }
body { margin:0; font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif; background:var(--bg); color:var(--text); }
#app { max-width: 860px; margin: 0 auto; padding: 24px 16px 64px; }

.card { background:var(--card); border:1px solid var(--border); border-radius:12px; padding:20px; margin-bottom:16px; }
.auth { max-width: 380px; margin: 8vh auto; }
h1 { margin: 0 0 16px; font-size: 22px; }
h2 { margin: 0 0 14px; font-size: 17px; }

.tabs button, .topbar button { background:none; border:1px solid var(--border); padding:8px 14px; border-radius:8px; cursor:pointer; color:var(--text); }
.tabs button.active, .topbar button.active { background:var(--primary); color:#fff; border-color:var(--primary); }

input { width:100%; padding:10px 12px; margin-bottom:10px; border:1px solid var(--border); border-radius:8px; font-size:14px; }
button.primary { background:var(--primary); color:#fff; border:none; padding:10px 16px; border-radius:8px; cursor:pointer; }
a.button { display:inline-block; background:var(--primary); color:#fff; border:none; padding:10px 16px; border-radius:8px; cursor:pointer; text-decoration:none; font-size:14px; }
a.button:hover { opacity:.9; }
.row { display:flex; gap:8px; }
.row input { margin-bottom:0; flex:1; }

.topbar { display:flex; justify-content:space-between; align-items:center; margin-bottom:16px; }
.topbar > div { display:flex; gap:8px; }

.msg { color:#c0392b; min-height:18px; font-size:13px; }
.hint, .muted { color:var(--muted); font-size:13px; }
code { background:#eef2f7; padding:2px 6px; border-radius:6px; font-size:13px; word-break:break-all; }
.alert { background:#eaf3ff; border:1px solid #b9d4ff; padding:12px; border-radius:8px; margin:10px 0; font-size:14px; }
table { width:100%; border-collapse:collapse; font-size:14px; }
th, td { text-align:left; padding:8px 10px; border-bottom:1px solid var(--border); }
th { color:var(--muted); font-weight:600; }