:root{
  --ground:#F4F6F9; --surface:#FFFFFF; --ink:#1B2230; --muted:#5A6373; --rule:#DBE0E8;
  --accent:#3447A8; --accent-soft:#E6E9F7;
  --low:#1E8A6E; --low-soft:#DDF1EA; --mid:#B97F0E; --mid-soft:#F7EDD6; --high:#C2433A; --high-soft:#F8E0DD;
  --period:#9C2E5B; --track:#E7EAF0; --on-accent:#fff;
  color-scheme:light;
}
@media (prefers-color-scheme: dark){
  :root{
    color-scheme:dark;
    --ground:#0E1218; --surface:#161B24; --ink:#E5E8EE; --muted:#9AA3B3; --rule:#2A3140;
    --accent:#8E9CFF; --accent-soft:#1E2442;
    --low:#3CC39D; --low-soft:#123229; --mid:#E2AA3C; --mid-soft:#352A12; --high:#EE6F64; --high-soft:#3A1C1A;
    --period:#E06A9C; --track:#262D3A; --on-accent:#0E1218;
  }
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{margin:0;background:var(--ground);color:var(--ink)}
body{font:15px/1.6 "PingFang SC","Microsoft YaHei",system-ui,sans-serif;padding:0 16px}
main{max-width:480px;margin:0 auto;padding:calc(16px + env(safe-area-inset-top,0px)) 0 calc(84px + env(safe-area-inset-bottom,0px))}
h1{font-size:22px;margin:8px 0 4px}
h2{font-size:17px;margin:0}
p{margin:0}
.muted{color:var(--muted)} .small{font-size:13px}
.page,.gate-step{display:flex;flex-direction:column;gap:12px}
#gate{max-width:480px;margin:0 auto;padding:calc(24px + env(safe-area-inset-top,0px)) 0 32px}
.card{background:var(--surface);border:1px solid var(--rule);border-radius:14px;padding:14px;display:flex;flex-direction:column;gap:8px}
.notice{background:var(--high-soft);color:var(--high);border-radius:10px;padding:10px 12px;font-size:14px}
.note{border-left:3px solid var(--high);padding-left:10px;font-size:13.5px}
.btn{font:inherit;font-weight:600;border:0;border-radius:12px;padding:12px;background:var(--accent);color:var(--on-accent);cursor:pointer;width:100%}
.btn.ghost{background:transparent;color:var(--accent);border:1px solid var(--accent)}
.btn.danger{background:var(--high)}
.btn:disabled{opacity:.45;cursor:not-allowed}
.row{display:flex;gap:8px;flex-wrap:wrap}
.row>.btn{flex:1;min-width:120px}
.consent{margin:0;padding-left:1.3em;display:flex;flex-direction:column;gap:10px}
.check{display:flex;gap:8px;align-items:center;font-weight:600}
.check input{width:20px;height:20px}
/* Today */
.ring{width:170px;max-width:60vw;aspect-ratio:1;border-radius:50%;margin:4px auto;display:grid;place-items:center}
.ring .in{width:80%;aspect-ratio:1;border-radius:50%;background:var(--surface);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px}
.pct{font:600 32px/1.1 ui-monospace,"SFMono-Regular",Consolas,monospace;font-variant-numeric:tabular-nums}
.tag{display:inline-block;font-size:12.5px;font-weight:600;padding:1px 10px;border-radius:999px}
.lv-low{color:var(--low)} .lv-mid{color:var(--mid)} .lv-high{color:var(--high)} .lv-unknown{color:var(--muted)}
.tag.lv-low{background:var(--low-soft)} .tag.lv-mid{background:var(--mid-soft)} .tag.lv-high{background:var(--high-soft)} .tag.lv-unknown{background:var(--track)}
.week{display:grid;grid-template-columns:repeat(7,1fr);gap:4px;text-align:center;font-size:12px;color:var(--muted)}
.dot{width:10px;height:10px;border-radius:50%;margin:4px auto 0;background:var(--track)}
.bg-low{background:var(--low)} .bg-mid{background:var(--mid)} .bg-high{background:var(--high)}
/* Forms */
label.field{display:flex;flex-direction:column;gap:6px;font-size:13px;color:var(--muted)}
input[type=date],input[type=number]{font:inherit;color:var(--ink);background:var(--surface);border:1px solid var(--rule);border-radius:10px;padding:10px;width:100%}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chips label{position:relative}
.chips input{position:absolute;opacity:0;inset:0}
.chips span{display:inline-block;border:1px solid var(--rule);border-radius:999px;padding:5px 12px;font-size:14px;color:var(--ink);background:var(--surface)}
.chips input:checked+span{border-color:var(--accent);background:var(--accent-soft);color:var(--accent);font-weight:600}
.chips input:focus-visible+span,.btn:focus-visible,.tabs button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
/* Calendar */
.cal-head{display:flex;justify-content:space-between;align-items:center}
.cal-head button{font:inherit;background:none;border:1px solid var(--rule);color:var(--ink);border-radius:8px;width:40px;height:34px}
.cal{display:grid;grid-template-columns:repeat(7,1fr);gap:4px;font-size:13px}
.cal .w{text-align:center;color:var(--muted);font-size:12px}
.cal button{font:inherit;aspect-ratio:1;border:0;border-radius:8px;background:var(--track);color:var(--ink);padding:0}
.cal .c-low{background:var(--low-soft);color:var(--low)} .cal .c-mid{background:var(--mid-soft);color:var(--mid)}
.cal .c-high{background:var(--high-soft);color:var(--high);font-weight:600} .cal .c-period{background:var(--period);color:#fff}
.cal .today{outline:2px solid var(--accent);outline-offset:1px}
.cal .sel{box-shadow:inset 0 0 0 2px var(--ink)}
.legend{display:flex;flex-wrap:wrap;gap:10px;font-size:12px;color:var(--muted)}
.legend i{display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:4px;vertical-align:-1px}
.steps{margin:0;padding-left:1.3em;display:flex;flex-direction:column;gap:6px;font-size:14px}
/* Tab bar */
.tabs{position:fixed;left:0;right:0;bottom:0;display:grid;grid-template-columns:repeat(4,1fr);background:var(--surface);border-top:1px solid var(--rule);padding:6px 8px calc(6px + env(safe-area-inset-bottom,0px))}
.tabs button{font:inherit;font-size:13px;background:none;border:0;color:var(--muted);padding:8px 2px;border-radius:10px}
.tabs button.on{color:var(--accent);font-weight:600;background:var(--accent-soft)}
#toast{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(80px + env(safe-area-inset-bottom,0px));background:var(--ink);color:var(--ground);padding:8px 16px;border-radius:999px;font-size:14px}