:root{
  color-scheme: light dark;
  /* surfaces + ink (dataviz palette: series/status hues are validated, keep them) */
  --plane:#f2f2ef; --surface:#ffffff; --raised:#ffffff;
  --ink:#0b0b0b; --ink2:#52514e; --muted:#7c7b76;
  --grid:#e6e5df; --axis:#c3c2b7; --good:#006300; --warn:#fab219; --crit:#d03b3b;
  --series-1:#2a78d6; --series-2:#eb6834; --series-3:#1baf7a; --series-4:#eda100;
  --ring:rgba(11,11,11,0.10); --ttbg:#0b0b0b; --ttink:#fff;
  --me:#2a78d6; --meink:#fff; --bot:#e8e8e3; --botink:var(--ink);
  /* app */
  --accent:var(--series-1); --accent-ink:#fff;
  --tint:rgba(42,120,214,0.11); --fill:rgba(118,118,110,0.12); --sep:rgba(60,60,55,0.16);
  --bar:rgba(242,242,239,0.82); --seg:rgba(118,118,110,0.13); --seg-on:#ffffff;
  --shadow-seg:0 1px 2px rgba(0,0,0,.10),0 2px 8px rgba(0,0,0,.05);
  --r-s:8px; --r-m:12px; --r-l:20px;
  --pad:16px;
  --ease:cubic-bezier(.2,.8,.2,1);
}
@media (prefers-color-scheme: dark){:root{
  --plane:#0d0d0d; --surface:#1a1a19; --raised:#242423;
  --ink:#fff; --ink2:#c3c2b7; --muted:#8f8d86;
  --grid:#2c2c2a; --axis:#383835; --good:#0ca30c;
  --series-1:#3987e5; --series-2:#d95926; --series-3:#199e70; --series-4:#c98500;
  --ring:rgba(255,255,255,0.10); --ttbg:#f4f3ee; --ttink:#0b0b0b;
  --me:#3987e5; --meink:#fff; --bot:#262625;
  --tint:rgba(57,135,229,0.18); --fill:rgba(118,118,110,0.24); --sep:rgba(255,255,255,0.10);
  --bar:rgba(13,13,13,0.80); --seg:rgba(118,118,110,0.24); --seg-on:#3a3a38;
  --shadow-seg:0 1px 2px rgba(0,0,0,.4);
}}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
html,body{background:var(--plane)}
body{margin:0;color:var(--ink);font-family:-apple-system,system-ui,"SF Pro Text","Segoe UI",Roboto,sans-serif;
  font-size:16px;line-height:1.4;-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent;
  padding-left:env(safe-area-inset-left);padding-right:env(safe-area-inset-right)}
a{color:var(--accent);text-decoration:none} a:hover{text-decoration:underline}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
code,.mono{font-family:ui-monospace,"SF Mono",Menlo,monospace;font-size:.9em;word-break:break-all}
.wrap{max-width:680px;margin:0 auto;padding:4px var(--pad) max(32px,calc(env(safe-area-inset-bottom) + 24px))}
body.solo .wrap{padding-top:max(24px,env(safe-area-inset-top))}

/* ---- top bar: a segmented control, sticky under the status bar ---- */
.bar{position:sticky;top:0;z-index:5;padding:max(8px,env(safe-area-inset-top)) var(--pad) 8px;
  background:var(--bar);-webkit-backdrop-filter:saturate(180%) blur(20px);backdrop-filter:saturate(180%) blur(20px);
  box-shadow:0 .5px 0 var(--sep)}
.tabs{display:flex;gap:2px;max-width:648px;margin:0 auto;padding:2px;border-radius:10px;background:var(--seg)}
.tabs a{flex:1 1 auto;display:flex;align-items:center;justify-content:center;min-height:36px;padding:0 10px;
  border-radius:8px;color:var(--ink);font-size:14px;font-weight:500;letter-spacing:-.01em;text-decoration:none;
  white-space:nowrap;transition:background .2s var(--ease)}
.tabs a.ico{flex:0 0 44px;padding:0}
.tabs a svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.tabs a[aria-current]{background:var(--seg-on);box-shadow:var(--shadow-seg);font-weight:600}
.tabs a:not([aria-current]){color:var(--ink2)}

/* ---- type ---- */
.title{font-size:32px;line-height:1.1;font-weight:700;letter-spacing:-.022em;margin:18px 0 12px}
h1{font-size:28px;letter-spacing:-.02em;margin:8px 0}
h2{font-size:17px;font-weight:600;letter-spacing:-.01em;margin:0 0 2px}
h3{font-size:13px;font-weight:600;color:var(--ink2);margin:14px 0 4px}
.lede{color:var(--ink2);font-size:15px;margin:0 0 20px;max-width:34em}
.cap{color:var(--muted);font-size:13px;margin:0 0 10px}
.sub{color:var(--muted);font-size:13px;margin-bottom:16px}
.empty{color:var(--muted);font-size:14px;padding:16px 0 8px}
.chip{display:inline-flex;align-items:center;gap:6px;margin:0 0 14px;padding:5px 12px;border-radius:99px;
  background:var(--surface);box-shadow:0 0 0 .5px var(--ring);font-size:14px;color:var(--ink2)}
.pill{display:inline-block;font-size:12px;font-weight:500;padding:3px 9px;border-radius:99px;background:var(--fill);color:var(--ink2);white-space:nowrap}
.pill.open{background:var(--tint);color:var(--accent)}

/* ---- inset grouped lists (iOS Settings) ---- */
section{margin-bottom:28px}
.group-h{font-size:13px;font-weight:400;color:var(--muted);margin:22px var(--pad) 7px;letter-spacing:0}
section>.group-h:first-child,section>form>.group-h:first-child{margin-top:0}
.group{background:var(--surface);border-radius:var(--r-m);overflow:hidden;margin:0}
.group-f{color:var(--muted);font-size:13px;line-height:1.4;margin:7px var(--pad) 0}
.group-f p{margin:0 0 6px} .group-f:empty{display:none}
.field{position:relative;display:flex;align-items:center;gap:12px;min-height:48px;padding:6px var(--pad);margin:0;cursor:default}
.field::before{content:"";position:absolute;top:0;left:var(--pad);right:0;height:.5px;background:var(--sep)}
.group>.field:first-child::before,.group>div:first-child>.field::before{display:none}
.field .lbl{flex:0 0 auto;font-size:16px;color:var(--ink)}
.field>input,.field>select,.field .val{flex:1 1 auto;min-width:0;text-align:right}
.field .val{color:var(--muted);font-size:16px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.field em,.pair em{font-style:normal;color:var(--muted);font-size:15px;flex:0 0 auto}
.pair{flex:1;display:flex;align-items:center;justify-content:flex-end;gap:6px;min-width:0}
.pair input{width:3.6em;flex:0 1 auto;text-align:right}
.field .pair input[type=number]{background:var(--fill);border-radius:var(--r-s);padding:5px 8px;min-height:34px;color:var(--ink)}
.pair input[type=time]{width:auto}
.field>input[type=time]{flex:0 0 auto;margin-left:auto}
.field .lbl{white-space:nowrap}
input,select,textarea,button{font:inherit;font-size:16px;color:inherit}
.field input[type=text],.field input[type=password],.field input[type=number],.field select{
  border:0;background:transparent;padding:6px 0;color:var(--muted);outline:none;-webkit-appearance:none;appearance:none}
.field input:focus{color:var(--ink)}
.field input::placeholder{color:var(--muted);opacity:.65}
.field select{padding-right:18px;background-image:linear-gradient(45deg,transparent 50%,var(--muted) 50%),linear-gradient(135deg,var(--muted) 50%,transparent 50%);
  background-position:right 6px center,right 1px center;background-size:5px 5px,5px 5px;background-repeat:no-repeat;
  text-align-last:right;direction:ltr;cursor:pointer}
.field input[type=time]{border:0;border-radius:var(--r-s);background:var(--fill);color:var(--ink);padding:5px 8px;min-height:34px;font-variant-numeric:tabular-nums;-webkit-appearance:none;appearance:none}
.field input[type=number]::-webkit-inner-spin-button{opacity:0}
/* switch */
input.switch{-webkit-appearance:none;appearance:none;margin:0 0 0 auto;flex:0 0 51px;width:51px;height:31px;border-radius:99px;
  background:var(--fill);position:relative;cursor:pointer;transition:background .2s var(--ease)}
input.switch::after{content:"";position:absolute;top:2px;left:2px;width:27px;height:27px;border-radius:50%;background:#fff;
  box-shadow:0 2px 6px rgba(0,0,0,.2),0 0 0 .5px rgba(0,0,0,.04);transition:transform .22s var(--ease)}
input.switch:checked{background:var(--good)}
input.switch:checked::after{transform:translateX(20px)}
/* stand-alone inputs (textarea etc.) */
input[type=text]:not(.field *),input[type=password]:not(.field *),select:not(.field *){
  width:100%;padding:11px 12px;border:0;border-radius:var(--r-m);background:var(--surface);color:var(--ink)}

/* ---- buttons ---- */
button,.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:44px;padding:0 18px;border-radius:var(--r-m);
  border:0;background:var(--tint);color:var(--accent);font-weight:600;cursor:pointer;text-decoration:none;
  transition:transform .12s var(--ease),opacity .2s,background .2s}
button:active:not(:disabled),.btn:active{transform:scale(.97)}
button.primary,.btn.primary{background:var(--accent);color:var(--accent-ink)}
button.small{min-height:34px;padding:0 12px;font-size:14px;border-radius:99px}
button.danger{color:var(--crit);background:transparent}
button.small.danger{background:rgba(208,59,59,.1)}
button:disabled{opacity:.45;cursor:default}
.btn:hover{text-decoration:none}
.rowbtn{width:100%;justify-content:flex-start;min-height:48px;padding:0 var(--pad);border-radius:0;background:transparent;font-weight:400;color:var(--accent)}
.rowbtn.danger{color:var(--crit)}
.rowbtn:active:not(:disabled){transform:none;background:var(--fill)}
.actions{display:flex;flex-direction:column;align-items:stretch;gap:8px;margin-top:16px}
.actions button{width:100%;min-height:50px;font-size:17px}
.out{font-size:13px;color:var(--ink2);text-align:center;min-height:0}
.out:empty{display:none}
.out.err{color:var(--crit)} .out.ok{color:var(--good)}
.group-f .out{display:inline;text-align:left} .group-f .out:empty{display:none}
form{margin:0} form.inline{display:flex;flex-direction:column;align-items:flex-end;gap:4px}
form.inline .out{text-align:right}

/* ---- login / invite ---- */
.box{max-width:400px;margin:6vh auto 0}
.mark{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:700;letter-spacing:-.02em;margin:0 0 28px}
.mark .glyph{width:30px;height:30px;border-radius:9px;background:var(--accent);position:relative}
.mark .glyph::before,.mark .glyph::after{content:"";position:absolute;background:#fff;border-radius:2px}
.mark .glyph::before{left:7px;right:7px;top:14px;height:2.5px}
.mark .glyph::after{left:8px;top:9px;width:4px;height:12.5px;box-shadow:10px 0 0 #fff}
.box .title{margin-top:0}
.foot{color:var(--muted);font-size:13px;text-align:center;margin-top:20px}
.linkbox{background:var(--surface);border-radius:var(--r-m);padding:12px var(--pad);margin-top:12px;
  font-family:ui-monospace,"SF Mono",Menlo,monospace;font-size:14px;word-break:break-all;-webkit-user-select:all;user-select:all}
.steps{padding:12px var(--pad);margin-top:12px} .steps p{margin:0 0 6px}
.code-big{font-family:ui-monospace,"SF Mono",Menlo,monospace;font-size:28px;font-weight:600;letter-spacing:.1em;margin:4px 0}
.dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--muted);margin-right:7px;vertical-align:1px}
.dot.on{background:var(--good)}

/* ---- lists (admin) ---- */
.list{list-style:none;padding:0}
.list li{position:relative;display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:52px;padding:10px var(--pad)}
.list li+li::before{content:"";position:absolute;top:0;left:var(--pad);right:0;height:.5px;background:var(--sep)}
.list .who{display:flex;flex-direction:column;min-width:0}
.list .who b{font-weight:500} .list .who span{color:var(--muted);font-size:13px}
.list .none{color:var(--muted)}

/* ---- dashboard ---- */
.tiles{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-bottom:24px}
.tile{background:var(--surface);border-radius:var(--r-m);padding:13px 14px 12px;min-width:0}
.tile .k{color:var(--ink2);font-size:13px;font-weight:500}
.tile .v{font-size:28px;font-weight:700;letter-spacing:-.025em;line-height:1.1;margin-top:6px;font-variant-numeric:tabular-nums;white-space:nowrap}
.tile .v small{font-size:14px;font-weight:500;color:var(--muted);letter-spacing:0;margin-left:4px}
.tile .d{font-size:13px;color:var(--muted);margin-top:4px}
.meter{height:6px;border-radius:99px;background:var(--fill);margin-top:10px;overflow:hidden}
.meter span{display:block;height:100%;border-radius:99px;background:var(--accent);min-width:6px}
.meter.met span{background:var(--good)}
.tile.week{grid-column:1/-1;display:grid;grid-template-columns:1fr auto;align-items:end;column-gap:12px}
.tile.week .k{grid-column:1/-1}
.days{list-style:none;display:flex;gap:6px;margin:0;padding:0}
.days li{display:flex;flex-direction:column;align-items:center;gap:4px;font-size:11px;color:var(--muted)}
.days i{display:block;width:16px;height:16px;border-radius:50%;box-shadow:inset 0 0 0 1.5px var(--axis)}
.days li.on i{background:var(--accent);box-shadow:none}
.days li.today span{color:var(--ink);font-weight:600}
.card{background:var(--surface);border-radius:var(--r-m);padding:14px 14px 12px;margin-bottom:12px}
.card .cap{margin-bottom:6px}
.legend{display:flex;gap:6px 14px;flex-wrap:wrap;font-size:13px;color:var(--ink2);margin:8px 0 0}
.legend i{display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:6px;vertical-align:-1px}
svg{width:100%;height:auto;display:block;touch-action:pan-y;overflow:visible}
svg text{font-variant-numeric:tabular-nums}
.reflabel{paint-order:stroke;stroke:var(--surface);stroke-width:3px}
#tt{position:fixed;z-index:9;display:none;background:var(--ttbg);color:var(--ttink);font-size:13px;font-weight:500;
  padding:6px 9px;border-radius:8px;pointer-events:none;box-shadow:0 4px 14px rgba(0,0,0,.22);white-space:nowrap}
.hit{fill:rgba(0,0,0,0);cursor:pointer}

/* ---- 14-day averages ---- */
.avgs{display:grid;grid-template-columns:1fr 1fr;gap:14px 12px;margin:6px 0 14px}
.avgs .k{color:var(--muted);font-size:13px}
.avgs .v{font-size:20px;font-weight:650;font-variant-numeric:tabular-nums;margin-top:1px}
.card h3{font-size:13px;font-weight:600;color:var(--ink2);margin:0 0 8px}
.split{display:flex;height:14px;border-radius:7px;overflow:hidden;gap:2px;background:var(--grid)}
.split i{display:block;min-width:2px}

/* ---- empty states ---- */
.blank{text-align:center;padding:36px 12px 20px;max-width:26em;margin:0 auto}
.blank h2{font-size:20px;letter-spacing:-.015em;margin-bottom:6px}
.blank p{color:var(--ink2);font-size:15px;margin:0 0 18px}
.prompts{display:grid;gap:8px;text-align:left}
.prompt{display:flex;flex-direction:column;align-items:flex-start;gap:1px;width:100%;min-height:52px;padding:9px 14px;
  background:var(--surface);color:var(--ink);font-weight:400;border-radius:var(--r-m);box-shadow:0 0 0 .5px var(--ring)}
.prompt b{font-size:13px;font-weight:500;color:var(--muted)} .prompt span{font-size:15px}

/* ---- chat ---- */
body.chatpage{display:flex;flex-direction:column;height:100vh;height:100dvh;overflow:hidden}
body.chatpage .wrap{flex:1;min-height:0;width:100%;display:flex;flex-direction:column;padding:0}
#msgs{flex:1;min-height:0;overflow-y:auto;-webkit-overflow-scrolling:touch;overscroll-behavior:contain;
  display:flex;flex-direction:column;padding:10px var(--pad) 12px}
#msgs>:first-child{margin-top:auto}
#msgs:empty{flex:0 0 auto;padding:0}
body.chatpage #chat-empty{flex:1;overflow-y:auto;display:flex;flex-direction:column;justify-content:center;padding:16px var(--pad)}
.day{align-self:center;font-size:12px;font-weight:500;color:var(--muted);margin:14px 0 8px}
.msg{max-width:80%;padding:8px 13px;border-radius:var(--r-l);white-space:pre-wrap;overflow-wrap:anywhere;font-size:16px;line-height:1.38;
  margin-top:2px}
.msg.user{align-self:flex-end;background:var(--me);color:var(--meink)}
.msg.assistant{align-self:flex-start;background:var(--bot);color:var(--botink)}
.msg.first{margin-top:10px}
.msg.user.first:not(.last){border-bottom-right-radius:6px}
.msg.user:not(.first){border-top-right-radius:6px}
.msg.user:not(.first):not(.last){border-bottom-right-radius:6px}
.msg.assistant.first:not(.last){border-bottom-left-radius:6px}
.msg.assistant:not(.first){border-top-right-radius:var(--r-l);border-top-left-radius:6px}
.msg.assistant:not(.first):not(.last){border-bottom-left-radius:6px}
.msg a{color:inherit;text-decoration:underline;text-underline-offset:2px;text-decoration-thickness:1px}
.msg.assistant a{color:var(--accent)}
.msg .ph{display:inline-flex;align-items:center;gap:5px;font-weight:600}
.msg.err{opacity:.6}
.stamp{font-size:11px;color:var(--muted);margin:4px 8px 0}
.stamp.user{align-self:flex-end} .stamp.assistant{align-self:flex-start}
.tag{align-self:flex-start;font-size:12px;font-weight:600;color:var(--series-4);margin:12px 6px -6px}
.msg.enter{animation:pop .28s var(--ease)}
@keyframes pop{from{opacity:0;transform:translateY(6px) scale(.98)}to{opacity:1;transform:none}}
.msg.typing{display:flex;gap:4px;align-items:center;padding:13px 14px;margin-top:10px}
.msg.typing i{width:7px;height:7px;border-radius:50%;background:var(--muted);animation:blink 1.2s infinite ease-in-out}
.msg.typing i:nth-child(2){animation-delay:.15s} .msg.typing i:nth-child(3){animation-delay:.3s}
@keyframes blink{0%,60%,100%{opacity:.35;transform:none}30%{opacity:1;transform:translateY(-2px)}}
#composer{flex:0 0 auto;display:flex;gap:8px;align-items:flex-end;
  padding:8px var(--pad) max(10px,env(safe-area-inset-bottom));background:var(--bar);
  -webkit-backdrop-filter:saturate(180%) blur(20px);backdrop-filter:saturate(180%) blur(20px);box-shadow:0 -.5px 0 var(--sep)}
#composer textarea{flex:1;min-width:0;resize:none;max-height:140px;min-height:40px;padding:8px 14px;line-height:22px;
  border:0;border-radius:20px;background:var(--surface);color:var(--ink);box-shadow:inset 0 0 0 .5px var(--ring);outline:none}
#composer textarea:focus{box-shadow:inset 0 0 0 1px var(--accent)}
#composer textarea::placeholder{color:var(--muted)}
.round{flex:0 0 40px;width:40px;min-height:40px;height:40px;padding:0;border-radius:50%;position:relative}
.round::after{content:"";position:absolute;inset:-2px}
.round svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
#photo-btn{background:transparent;color:var(--ink2)}
#send-btn{background:var(--accent);color:#fff}
#send-btn svg{stroke-width:2.4;width:20px;height:20px}
#send-btn.idle{background:var(--fill);color:var(--muted)}
@media (min-width:700px){.msg{max-width:70%}}
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  .msg.typing i{opacity:.6}
}