:root {
  --bg: #e7ebf3;
  --card: #ffffff;
  --primary: #4D96FF;
  --income: #2EC4B6;
  --expense: #FF6B6B;
  --text: #1f2330;
  --muted: #8a90a2;
  --line: #eceef3;
}
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  max-width: 480px;
  margin: 0 auto;
  min-height: 100vh;
}
#app { padding-bottom: 72px; }

/* 认证页 */
.auth-wrap { padding: 48px 24px; text-align: center; }
.brand .logo {
  width: 88px; height: 88px; margin: 0 auto 4px;
  display: flex; align-items: center; justify-content: center;
  font-size: 46px; font-weight: 700; color: #fff;
  background: linear-gradient(135deg, #3D7BFF, #11C2A0);
  border-radius: 24px; box-shadow: 0 6px 18px rgba(77,150,255,0.35);
}
.brand h1 { margin: 8px 0 2px; font-size: 26px; }
.brand .sub { color: var(--muted); margin: 0 0 24px; }

.card {
  background: var(--card);
  border-radius: 16px;
  padding: 16px;
  margin: 12px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.04);
}
.card h3 { margin: 0 0 12px; font-size: 16px; }

.tabs { display: flex; gap: 8px; margin-bottom: 14px; }
.tab {
  flex: 1; padding: 10px; border: none; background: var(--bg);
  border-radius: 10px; font-size: 15px; color: var(--muted); cursor: pointer;
}
.tab.active { background: var(--primary); color: #fff; }

.form { display: flex; flex-direction: column; gap: 10px; }
.form input, .form select {
  padding: 12px 14px; border: 1px solid var(--line); border-radius: 10px;
  font-size: 15px; background: #fff; width: 100%;
}
.btn {
  padding: 12px; border: none; border-radius: 10px; font-size: 15px;
  background: var(--bg); color: var(--text); cursor: pointer;
}
.btn.primary { background: var(--primary); color: #fff; font-weight: 600; }
.btn.ghost { background: transparent; color: var(--muted); }
.btn.sm { padding: 6px 12px; font-size: 13px; }
.btn:active { transform: scale(0.98); }

.msg { font-size: 13px; min-height: 18px; margin-top: 4px; }
.msg.err { color: var(--expense); }
.msg.ok { color: var(--income); }
.hint { font-size: 12px; color: var(--muted); margin: 10px 0 0; }
.empty { color: var(--muted); text-align: center; padding: 24px 0; font-size: 14px; }

/* 顶栏 / 月份 */
.topbar { display: flex; justify-content: space-between; align-items: center; padding: 16px; }
.greet { font-weight: 600; }
.month-pick { display: flex; align-items: center; gap: 10px; padding: 0 16px 4px; }
.month-pick input { border: 1px solid var(--line); border-radius: 8px; padding: 6px 8px; }
.mlabel { color: var(--muted); font-size: 14px; }

/* 汇总卡 */
.summary { display: flex; gap: 10px; padding: 4px 12px; }
.s-card { flex: 1; background: var(--card); border-radius: 14px; padding: 14px 10px; text-align: center; box-shadow: 0 2px 12px rgba(0,0,0,0.04); }
.s-label { font-size: 12px; color: var(--muted); }
.s-val { font-size: 17px; font-weight: 700; margin-top: 4px; }
.s-card.income .s-val { color: var(--income); }
.s-card.expense .s-val { color: var(--expense); }

/* 分段选择 */
.seg { display: flex; background: var(--bg); border-radius: 10px; padding: 4px; }
.seg-btn { flex: 1; border: none; background: transparent; padding: 10px; border-radius: 8px; font-size: 15px; color: var(--muted); cursor: pointer; }
.seg-btn.active { background: #fff; color: var(--text); font-weight: 600; box-shadow: 0 1px 4px rgba(0,0,0,0.08); }

/* 表格 */
.tx-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.tx-table th, .tx-table td { padding: 10px 6px; text-align: left; border-bottom: 1px solid var(--line); }
.tx-table td.income { color: var(--income); font-weight: 600; }
.tx-table td.expense { color: var(--expense); font-weight: 600; }
.del { border: none; background: transparent; cursor: pointer; font-size: 16px; }

/* 预算输入 */
.blimit { width: 100px; padding: 8px; border: 1px solid var(--line); border-radius: 8px; }

/* 建议 */
.sug { border-radius: 12px; padding: 12px; margin-bottom: 10px; background: var(--card); border-left: 4px solid var(--muted); }
.sug.over { border-left-color: var(--expense); background: #fff5f5; }
.sug.warn { border-left-color: #FFB547; background: #fffaf0; }
.sug.ok { border-left-color: var(--income); }
.sug-head { font-weight: 600; display: flex; justify-content: space-between; }
.sug .pct { color: var(--muted); }
.sug-tip { font-size: 13px; margin-top: 6px; color: #444; }
.bar { height: 8px; background: var(--line); border-radius: 6px; margin: 8px 0; overflow: hidden; }
.bar-fill { height: 100%; border-radius: 6px; background: var(--income); }
.bar-fill.warn { background: #FFB547; }
.bar-fill.over { background: var(--expense); }

.quick { display: flex; gap: 10px; margin-top: 10px; }
.quick .btn { flex: 1; }

/* 底部导航 */
.bottom-nav {
  position: fixed; bottom: 0; left: 50%; transform: translateX(-50%);
  width: 100%; max-width: 480px; display: flex; background: #fff;
  box-shadow: 0 -2px 12px rgba(0,0,0,0.06); padding: 6px 0;
}
.bottom-nav button {
  flex: 1; border: none; background: transparent; padding: 6px 0;
  font-size: 11px; color: var(--muted); display: flex; flex-direction: column;
  align-items: center; gap: 2px; cursor: pointer;
}
.bottom-nav button span { font-size: 11px; }
.bottom-nav button.active { color: var(--primary); font-weight: 600; }