:root{--bg:#14181c;--card:#1d242b;--fg:#e8edf1;--mute:#8d9aa6;--ok:#3ecf8e;--warn:#f5a524;--bad:#ef5350;--acc:#4aa3ff;--line:#2b3540;color-scheme:dark light}
@media (prefers-color-scheme:light){:root{--bg:#f2f5f8;--card:#fff;--fg:#14202b;--mute:#5d6b78;--line:#d9e0e6}}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.4 system-ui,-apple-system,Segoe UI,Roboto,sans-serif}
body{padding:env(safe-area-inset-top) 16px calc(24px + env(safe-area-inset-bottom));max-width:520px;margin:0 auto}
header{display:flex;align-items:center;justify-content:space-between;padding:14px 0 6px}
h1{font-size:20px;margin:0}
.chips{display:flex;gap:6px;flex-wrap:wrap;justify-content:flex-end}
.chip{display:inline-flex;align-items:center;gap:6px;font-size:12px;padding:4px 9px;border-radius:99px;background:var(--card);border:1px solid var(--line);color:var(--mute)}
.chip i{width:8px;height:8px;border-radius:50%;background:var(--mute)}
.chip.ok i{background:var(--ok)}.chip.warn i{background:var(--warn)}.chip.bad i{background:var(--bad)}
.banner{margin:8px 0;padding:10px 12px;border-radius:12px;background:#4a3a12;color:#ffd98a;font-size:14px}
.banner.bad{background:#4a1c1c;color:#ffb4b0}
.hero{text-align:center;padding:18px 0 6px}
.phase{font-size:15px;color:var(--mute);letter-spacing:.02em}
.phase.run{color:var(--ok)}.phase.err{color:var(--bad)}.phase.heat{color:var(--warn)}
.temp{font-size:84px;font-weight:300;line-height:1.05}
.temp small{font-size:26px;color:var(--mute);margin-left:4px}
.age{font-size:13px;color:var(--mute)}
.age.stale{color:var(--warn)}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:6px 14px;margin:14px 0}
.row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 0}
.row+.row{border-top:1px solid var(--line)}
.lbl{color:var(--mute);font-size:14px}
.stepper{display:flex;align-items:center;gap:6px}
.stepper output{min-width:54px;text-align:center;font-size:22px;font-weight:600}
button{font:inherit;color:var(--fg);background:transparent;border:1px solid var(--line);border-radius:12px;padding:10px 14px;min-height:44px}
.stepper button{width:48px;font-size:22px}
button:active{background:var(--line)}
button:disabled{opacity:.4}
.seg{display:flex;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.seg button{border:0;border-radius:0;padding:10px 11px;font-size:14px}
.seg button.on{background:var(--acc);color:#04121f;font-weight:600}
.power{display:block;width:100%;font-size:20px;font-weight:600;padding:16px;background:var(--ok);color:#04201a;border:0;border-radius:16px;min-height:60px}
.power.off{background:var(--bad);color:#fff}
.power.confirm{background:var(--warn);color:#2a1a00}
.small .kv{display:flex;justify-content:space-between;padding:8px 0;font-size:14px}
.small .kv+.kv{border-top:1px solid var(--line)}
.kv span{color:var(--mute)}
details summary{padding:10px 0;color:var(--mute);cursor:pointer}
.btns{display:grid;grid-template-columns:1fr 1fr;gap:8px;padding:6px 0 12px}
.btns .warn{color:var(--bad)}
.toast{position:fixed;left:16px;right:16px;bottom:calc(16px + env(safe-area-inset-bottom));max-width:488px;margin:0 auto;padding:12px 14px;border-radius:12px;background:#0b0e11;color:#fff;border:1px solid var(--line);font-size:14px;z-index:10}
.toast.ok{border-color:var(--ok)}.toast.bad{border-color:var(--bad)}
dialog{border:1px solid var(--line);border-radius:16px;background:var(--card);color:var(--fg);width:min(92vw,420px)}
dialog::backdrop{background:#000a}
label{display:block;font-size:13px;color:var(--mute);margin:10px 0}
input{display:block;width:100%;margin-top:4px;padding:10px;border-radius:10px;border:1px solid var(--line);background:var(--bg);color:var(--fg);font:inherit}
.hint{font-size:13px;color:var(--mute)}
.dim{opacity:.45;pointer-events:none}