:root{--bg:#fafaf8;--card:#fff;--ink:#101312;--mute:#7a817e;--line:#e8e8e4;--green:#0d7a68;--green-soft:#e6f2ef;--red:#d6402f;--red-soft:#fbeae7;--amber:#b7791f;--med:#eceef0;--fs:18px;--r:14px;--ease:cubic-bezier(.2,.8,.2,1)}
@media (prefers-color-scheme:dark){:root{--bg:#0d0f0e;--card:#161918;--ink:#f1f3f2;--mute:#8a928f;--line:#252928;--green:#3fc4a8;--green-soft:#12302a;--red:#ff6b57;--red-soft:#33181a;--amber:#e0a84a;--med:#1b1f1e}}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html{background:var(--bg)}
body{margin:0;background:var(--bg);color:var(--ink);font:var(--fs)/1.4 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;letter-spacing:-.011em;-webkit-font-smoothing:antialiased;padding-bottom:calc(96px + env(safe-area-inset-bottom))}
main{max-width:600px;margin:0 auto;padding:calc(28px + env(safe-area-inset-top)) 22px 16px;animation:in .22s var(--ease)}
@keyframes in{from{opacity:0;transform:translateY(6px)}}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
button,input,select,textarea{font-family:inherit}
button{cursor:pointer;transition:background .12s,border-color .12s,color .12s,transform .08s var(--ease)}
button:active{transform:scale(.97)}
:focus-visible{outline:2px solid var(--green);outline-offset:2px}
h1{font-size:2rem;line-height:1.1;font-weight:650;letter-spacing:-.03em;margin:0 0 6px}
h2{font-size:1.1rem;margin:1.2em 0 .4em}
.hint{color:var(--mute);font-size:.82rem;font-weight:400}
h1+.hint,.sub{margin:0 0 8px}

/* sections: flat, divided by hairlines instead of boxed cards */
.card{padding:22px 0;margin:0;border-top:1px solid var(--line)}
.card:first-of-type{border-top:0}
.q{font-weight:600;font-size:.95rem;margin:0 0 12px;display:block}
label.f{display:block;margin:14px 0 6px;font-size:.82rem;color:var(--mute)}

/* fatigue scale: one connected control */
.scale{display:grid;grid-template-columns:repeat(5,1fr);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:var(--card)}
.scale button{min-height:78px;border:0;border-left:1px solid var(--line);background:none;color:var(--mute);font-size:.7rem;padding:0 2px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;border-radius:0}
.scale button:first-child{border-left:0}
.scale button b{font-size:1.6rem;font-weight:500;color:var(--ink);letter-spacing:-.02em;line-height:1}
.scale button.on{background:var(--ink);color:var(--bg)}
.scale button.on b{color:var(--bg)}
.seg{display:grid;grid-template-columns:1fr 1fr;gap:4px;padding:4px;background:var(--med);border-radius:var(--r)}
.seg button{min-height:52px;border:0;border-radius:10px;background:none;color:var(--mute);font-size:1rem}
.seg button.on{background:var(--card);color:var(--ink);font-weight:600;box-shadow:0 1px 2px rgba(0,0,0,.12),0 0 0 1px var(--line)}
.seg button.bad.on{background:var(--red);color:#fff;box-shadow:none}

.toggle{display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;background:none;border:0;color:inherit;font:inherit;padding:0;text-align:left}
.toggle .q{margin:0}
.toggle .hint{display:block;margin-top:2px}
.sw{width:56px;height:32px;border-radius:16px;background:var(--line);position:relative;flex:none;transition:background .18s}
.sw::after{content:"";position:absolute;top:3px;left:3px;width:26px;height:26px;border-radius:50%;background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.25);transition:transform .2s var(--ease)}
.toggle[aria-checked=true] .sw{background:var(--green)}.toggle[aria-checked=true] .sw::after{transform:translateX(24px)}

input[type=number],input[type=text],input[type=time],textarea,select{width:100%;font-size:1rem;padding:13px 14px;border-radius:12px;border:1px solid var(--line);background:var(--card);color:var(--ink);transition:border-color .12s}
input:focus,textarea:focus,select:focus{outline:0;border-color:var(--ink)}
textarea{resize:none}
.primary{width:100%;min-height:58px;border:0;border-radius:var(--r);background:var(--ink);color:var(--bg);font-weight:600;font-size:1.05rem;letter-spacing:-.01em}
.primary:disabled{opacity:.28;cursor:default}
.ghost{min-height:44px;padding:0 16px;border:1px solid var(--line);border-radius:12px;background:var(--card);color:var(--ink);font-size:.9rem;margin:0 4px 8px 0}
.ghost:active{background:var(--med)}
.danger{color:var(--mute)}
.save-bar{padding-top:6px}

/* tab bar */
#tabs{position:fixed;bottom:0;left:0;right:0;display:flex;justify-content:center;background:color-mix(in srgb,var(--bg) 82%,transparent);-webkit-backdrop-filter:saturate(1.6) blur(18px);backdrop-filter:saturate(1.6) blur(18px);border-top:1px solid var(--line);padding:6px 8px calc(6px + env(safe-area-inset-bottom))}
#tabs button{flex:1;max-width:150px;min-height:56px;border:0;background:none;color:var(--mute);font-size:.7rem;font-weight:500;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;border-radius:12px}
#tabs svg{width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
#tabs button.active{color:var(--ink)}
#tabs button.active svg{stroke:var(--green);stroke-width:2}

/* trends */
.tiles{display:grid;grid-template-columns:1fr 1fr;gap:0;margin:18px 0 6px;border-top:1px solid var(--line)}
.tile{padding:16px 0;border-bottom:1px solid var(--line)}
.tile:nth-child(odd){padding-right:14px;border-right:1px solid var(--line)}
.tile:nth-child(even){padding-left:18px}
.tile .n{font-size:1.9rem;font-weight:600;letter-spacing:-.035em;line-height:1.1}
.tile .l{color:var(--mute);font-size:.76rem;margin-top:4px;line-height:1.3}
.tile.alert .n{color:var(--red)}.tile.alert .l{color:var(--red)}
.range{display:flex;gap:4px;padding:4px;background:var(--med);border-radius:var(--r);margin:18px 0 8px}
.range button{flex:1;min-height:40px;border:0;border-radius:10px;background:none;color:var(--mute);font-size:.88rem}
.range button.on{background:var(--card);color:var(--ink);font-weight:600;box-shadow:0 1px 2px rgba(0,0,0,.12),0 0 0 1px var(--line)}
svg.chart{width:100%;height:auto;display:block}svg text{fill:var(--mute);font-size:10.5px;font-family:inherit}
.legend{display:flex;flex-wrap:wrap;gap:14px;color:var(--mute);font-size:.76rem;margin-top:10px}.legend i{display:inline-block;width:9px;height:9px;border-radius:50%;vertical-align:0;margin-right:6px}
.legend i.sq{border-radius:2px;border:1px solid var(--line)}

/* history */
.list{margin-top:14px;border-top:1px solid var(--line)}
.row{display:flex;justify-content:space-between;align-items:flex-start;gap:10px;padding:16px 0;border-bottom:1px solid var(--line)}
.row b{font-weight:600;font-size:.95rem}
.row .when{display:block;margin-bottom:6px}
.row .note{display:block;margin-top:6px}
.row .ghost{min-height:36px;width:36px;padding:0;border:0;background:none;font-size:1.05rem;margin:0;flex:none}
.pill{display:inline-block;padding:3px 10px;border-radius:99px;font-size:.74rem;background:var(--med);color:var(--ink);margin:0 4px 4px 0}
.pill.f{background:var(--red-soft);color:var(--red)}.pill.m{background:none;border:1px solid var(--line);color:var(--mute);padding:2px 9px}
.pill.fat{background:var(--ink);color:var(--bg)}

#toast{position:fixed;left:50%;bottom:calc(92px + env(safe-area-inset-bottom));transform:translate(-50%,8px);background:var(--ink);color:var(--bg);padding:11px 20px;border-radius:99px;font-size:.9rem;font-weight:500;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s var(--ease)}#toast.show{opacity:1;transform:translate(-50%,0)}
.range+.card{border-top:0;padding-top:8px}
.toggle br{display:none}.toggle>span:first-child{flex:1}.toggle .q,.toggle .hint{display:block}.toggle .q{margin:0}