/* 旅行助手 — 手机优先样式 */
:root{
  --bg:#f4f6f8; --card:#ffffff; --text:#1c2733; --muted:#66788a;
  --line:#e3e9ef; --primary:#0f766e; --primary-weak:#e2f2f0;
  --danger:#d33f49; --danger-weak:#fbe9ea; --warn:#b45309; --ok:#15803d;
  --chip:#eef2f6; --shadow:0 1px 3px rgba(16,34,46,.08),0 6px 18px rgba(16,34,46,.05);
  --radius:14px; --navh:60px;
}
@media (prefers-color-scheme: dark){
  :root{
    --bg:#101418; --card:#1a2128; --text:#e8eef3; --muted:#93a3b3;
    --line:#2a3540; --primary:#2dd4bf; --primary-weak:#123b39;
    --danger:#f87171; --danger-weak:#3b1d1f; --warn:#fbbf24; --ok:#4ade80;
    --chip:#232d37; --shadow:0 1px 3px rgba(0,0,0,.4);
  }
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0; background:var(--bg); color:var(--text);
  font:15px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif;
}
#app{max-width:560px;margin:0 auto;min-height:100vh}
main{padding:12px 14px calc(var(--navh) + 34px);}

/* 顶部 */
.topbar{
  position:sticky;top:0;z-index:20;background:var(--bg);
  padding:calc(env(safe-area-inset-top) + 10px) 14px 8px;
  display:flex;align-items:center;gap:10px;
}
.topbar h1{font-size:17px;margin:0;flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar .sub{font-size:12px;color:var(--muted);display:block;font-weight:400}
.sync-dot{width:9px;height:9px;border-radius:50%;background:#9aa7b4;flex:none}
.sync-dot.ok{background:var(--ok)} .sync-dot.off{background:#9aa7b4} .sync-dot.err{background:var(--danger)}
.sync-dot.busy{background:var(--warn)}

/* 底部导航 */
nav.tabs{
  position:fixed;left:0;right:0;bottom:0;z-index:30;
  display:flex;background:var(--card);border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
}
nav.tabs .inner{display:flex;max-width:560px;margin:0 auto;width:100%}
nav.tabs a{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;
  height:var(--navh);text-decoration:none;color:var(--muted);font-size:11px;gap:2px;
}
nav.tabs a.active{color:var(--primary)}
nav.tabs a svg{width:22px;height:22px}

/* 卡片/通用 */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:14px;margin-bottom:12px}
.card h2{font-size:15px;margin:0 0 8px}
.muted{color:var(--muted)} .small{font-size:12.5px}
.big{font-size:22px;font-weight:700}
.right{text-align:right}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.row{display:flex;align-items:center;gap:8px}
.spread{display:flex;align-items:center;justify-content:space-between;gap:8px}

.btn{
  appearance:none;border:1px solid var(--line);background:var(--card);color:var(--text);
  border-radius:10px;padding:10px 14px;font-size:14px;font-weight:600;cursor:pointer;
}
.btn.primary{background:var(--primary);border-color:var(--primary);color:#fff}
.btn.ghost{background:transparent}
.btn.danger{color:var(--danger);border-color:var(--danger)}
.btn.block{width:100%;display:block}
.btn:disabled{opacity:.5}
.btn.sm{padding:6px 10px;font-size:13px;border-radius:8px}

input,select,textarea{
  font:inherit;color:var(--text);background:var(--card);
  border:1px solid var(--line);border-radius:10px;padding:10px 12px;width:100%;
}
label.fld{display:block;margin-bottom:10px}
label.fld span{display:block;font-size:12.5px;color:var(--muted);margin-bottom:4px}

.chip{display:inline-flex;align-items:center;gap:4px;background:var(--chip);border-radius:999px;padding:2px 10px;font-size:12px;color:var(--muted);white-space:nowrap}
.chip.money{background:var(--primary-weak);color:var(--primary);font-weight:600}
.chip.danger{background:var(--danger-weak);color:var(--danger)}
.seg{display:flex;background:var(--chip);border-radius:10px;padding:3px;margin-bottom:12px}
.seg button{flex:1;border:0;background:transparent;padding:8px 0;border-radius:8px;font-size:13px;font-weight:600;color:var(--muted);cursor:pointer}
.seg button.active{background:var(--card);color:var(--text);box-shadow:var(--shadow)}

/* 行程 */
.daytabs{display:flex;gap:8px;overflow-x:auto;padding:2px 0 10px;-webkit-overflow-scrolling:touch;scrollbar-width:none}
.daytabs::-webkit-scrollbar{display:none}
.daytabs button{
  flex:none;border:1px solid var(--line);background:var(--card);border-radius:12px;
  padding:7px 12px;cursor:pointer;color:var(--muted);text-align:center;line-height:1.25;
}
.daytabs button b{display:block;font-size:14px;color:var(--text)}
.daytabs button.active{border-color:var(--primary);background:var(--primary-weak)}
.daytabs button.active b{color:var(--primary)}
.daytabs button.today:after{content:"今天";display:block;font-size:10px;color:var(--primary)}
.dayhead-title{font-size:17px;font-weight:700;margin:4px 0 2px}
.tl{list-style:none;margin:10px 0 0;padding:0;position:relative}
.tl:before{content:"";position:absolute;left:52px;top:6px;bottom:6px;width:2px;background:var(--line)}
.tl li{display:grid;grid-template-columns:46px 1fr;gap:14px;position:relative;padding:0 0 14px}
.tl .t{font-size:12px;color:var(--muted);text-align:right;padding-top:2px;font-variant-numeric:tabular-nums}
.tl .b{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:10px 12px;box-shadow:var(--shadow)}
.tl .b:before{content:"";position:absolute;left:48px;margin-top:8px;width:10px;height:10px;border-radius:50%;background:var(--primary);border:2px solid var(--bg)}
.tl .h{font-weight:600;font-size:14.5px}
.tl .d{font-size:13px;color:var(--muted);margin-top:3px}
.tl .c{margin-top:6px;display:flex;flex-wrap:wrap;gap:6px}

/* 记账 */
.list{list-style:none;margin:0;padding:0}
.list li{display:flex;gap:10px;align-items:center;padding:10px 2px;border-bottom:1px solid var(--line)}
.list li:last-child{border-bottom:0}
.cat-ico{width:36px;height:36px;border-radius:10px;background:var(--chip);display:flex;align-items:center;justify-content:center;font-size:17px;flex:none}
.li-main{flex:1;min-width:0}
.li-main b{font-size:14.5px;display:block;font-weight:600}
.li-main span{font-size:12.5px;color:var(--muted)}
.li-amt{text-align:right;font-weight:700;font-variant-numeric:tabular-nums}
.li-amt small{display:block;font-weight:400;color:var(--muted);font-size:11.5px}
.fab{
  position:fixed;right:calc(50vw - 280px + 16px);bottom:calc(var(--navh) + env(safe-area-inset-bottom) + 14px);
  width:54px;height:54px;border-radius:50%;background:var(--primary);color:#fff;border:0;
  font-size:26px;line-height:1;box-shadow:0 6px 16px rgba(15,118,110,.4);cursor:pointer;z-index:25;
}
@media (max-width:600px){.fab{right:16px}}

/* 弹层 */
.sheet-mask{position:fixed;inset:0;background:rgba(10,20,26,.45);z-index:40;display:flex;align-items:flex-end;justify-content:center;overscroll-behavior:contain;touch-action:none}
.sheet{
  background:var(--card);width:100%;max-width:560px;border-radius:16px 16px 0 0;padding:16px 16px calc(env(safe-area-inset-bottom) + 16px);
  max-height:88vh;overflow:auto;overscroll-behavior:contain;-webkit-overflow-scrolling:touch;touch-action:pan-y;
}
.sheet h3{margin:0 0 12px;font-size:16px}
.amt-display{font-size:30px;font-weight:700;text-align:right;font-variant-numeric:tabular-nums;min-height:40px}
.amt-display small{font-size:13px;color:var(--muted);font-weight:400;display:block}

/* 结算/统计 */
.bar{height:10px;border-radius:999px;background:var(--chip);overflow:hidden}
.bar i{display:block;height:100%;background:var(--primary);border-radius:999px}
.bar i.over{background:var(--danger)}
.legend{display:flex;flex-wrap:wrap;gap:6px 14px;font-size:12.5px;color:var(--muted);margin-top:8px}
.legend i{display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:5px}
.person-row{display:flex;justify-content:space-between;padding:8px 0;border-bottom:1px dashed var(--line)}
.person-row:last-child{border-bottom:0}

/* 清单 */
.check-item{display:flex;align-items:center;gap:10px;padding:10px 2px;border-bottom:1px solid var(--line)}
.check-item:last-child{border-bottom:0}
.check-item input{width:20px;height:20px;flex:none;accent-color:var(--primary)}
.check-item.done span{text-decoration:line-through;color:var(--muted)}

/* 空态 */
.empty{text-align:center;color:var(--muted);padding:38px 16px}
.empty .big-ico{font-size:40px;margin-bottom:8px}

/* 首页 */
.hero{padding:26px 6px 14px}
.hero .logo{width:64px;height:64px;border-radius:18px;background:linear-gradient(135deg,#0f766e,#2dd4bf);display:flex;align-items:center;justify-content:center;font-size:30px;margin-bottom:12px}
.trip-card{display:flex;align-items:center;gap:12px;cursor:pointer}
.trip-card .flag{font-size:26px}
.trip-card .tm{flex:1}
.trip-card b{display:block;font-size:15.5px}
.trip-card span{font-size:12.5px;color:var(--muted)}
.code{font-family:ui-monospace,Consolas,monospace;letter-spacing:2px;font-size:18px;font-weight:700}

/* 提示条 */
.note{background:var(--primary-weak);color:var(--primary);border-radius:10px;padding:9px 12px;font-size:12.5px;margin:8px 0}
.note.warn{background:#fdf3e3;color:var(--warn)}
@media (prefers-color-scheme: dark){.note.warn{background:#33280f}}

.toast{position:fixed;left:50%;bottom:calc(var(--navh) + 30px);transform:translateX(-50%);background:#20313f;color:#fff;border-radius:10px;padding:9px 16px;font-size:13.5px;z-index:60;box-shadow:var(--shadow);max-width:88vw;text-align:center}
h3.sec{font-size:13px;color:var(--muted);font-weight:600;margin:16px 2px 8px;letter-spacing:.3px}
a{color:var(--primary)}

/* 行程编辑 */
.done-btn{flex:none;width:26px;height:26px;border-radius:50%;border:2px solid var(--line);background:var(--card);color:transparent;font-size:14px;line-height:1;cursor:pointer;padding:0}
.done-btn.on{background:var(--primary);border-color:var(--primary);color:#fff}
.hrow{display:flex;align-items:flex-start;gap:8px}
.hrow .h{flex:1}
.tl li.done .h{text-decoration:line-through;color:var(--muted)}
.tl li.done .d{opacity:.55}
.btn.sm.exp-btn{padding:3px 8px;font-size:12px}
.costline{display:flex;gap:6px;align-items:center;flex-wrap:wrap}
.costline input{width:88px;padding:8px 10px}
.costline .unit{width:70px}