:root{
  /* Dark theme (default) */
  --bg:#0a0f1c; --card:#131a2b; --card2:#1b2440; --line:#2a3358;
  --text:#e9f3ff; --muted:#8a96bf;
  --green:#15e08a; --blue:#1f9dff; --yellow:#ffd23f;
  --good:#15e08a; --bad:#ff5f7e; --warn:#ffd23f;
  --grad:linear-gradient(135deg,#15e08a 0%,#1f9dff 100%);
  --grad-warm:linear-gradient(135deg,#ffd23f 0%,#ff5f7e 100%);
  --bar-bg:rgba(11,16,30,.78);
  --card-shadow:0 10px 30px rgba(0,0,0,.25);
  --glow-green:rgba(21,224,138,.18); --glow-blue:rgba(31,157,255,.18);
  --hero-glow:rgba(31,157,255,.22);
  --chart-grid:rgba(120,130,160,.22);
  --focus-ring:rgba(21,224,138,.25);
  --primary-btn-text:#05231a;
  --radius:16px; --maxw:760px;
}
@media (prefers-color-scheme: light){
  :root{
    --bg:#f3f6fb; --card:#ffffff; --card2:#eef2f8; --line:#dce3ee;
    --text:#101826; --muted:#5c6678;
    --green:#0a9e63; --blue:#1372cc; --yellow:#a77b00;
    --good:#0a9e63; --bad:#d6324d; --warn:#a77b00;
    --grad:linear-gradient(135deg,#0aa86a 0%,#1372cc 100%);
    --grad-warm:linear-gradient(135deg,#e0a400 0%,#e0445f 100%);
    --bar-bg:rgba(255,255,255,.80);
    --card-shadow:0 8px 24px rgba(20,40,80,.10);
    --glow-green:rgba(21,224,138,.10); --glow-blue:rgba(31,157,255,.10);
    --hero-glow:rgba(31,157,255,.12);
    --chart-grid:rgba(60,80,120,.15);
    --focus-ring:rgba(10,168,106,.25);
    --primary-btn-text:#ffffff;
  }
}
*{box-sizing:border-box}
html,body{margin:0}
body{
  color:var(--text);
  background:
    radial-gradient(900px 500px at 80% -10%, var(--glow-green), transparent 60%),
    radial-gradient(800px 500px at -10% 8%, var(--glow-blue), transparent 55%),
    var(--bg);
  background-attachment:fixed;
  font:15px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased;
}
.hidden{display:none !important}
.muted{color:var(--muted)}
.small{font-size:13px}
.err{color:var(--bad);min-height:1.2em;margin:.4em 0 0}
.spacer{flex:1}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

/* Brand */
.brand{display:flex;align-items:center;gap:9px;font-weight:800;letter-spacing:-.02em;font-size:18px}
.brand .logo{width:28px;height:28px;border-radius:9px;background:var(--grad);
  display:grid;place-items:center;box-shadow:0 4px 14px rgba(21,224,138,.40);flex:0 0 auto}
.brand .logo svg{width:17px;height:17px;display:block}
.brand b{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

/* Login */
.login{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}
.login .card{width:100%;max-width:370px;position:relative;overflow:hidden}
.login .card::before{content:"";position:absolute;inset:0 0 auto 0;height:4px;background:var(--grad)}
.login .brand{font-size:24px;justify-content:center;margin-bottom:4px}
.login .brand .logo{width:34px;height:34px}
.login .brand .logo svg{width:21px;height:21px}

/* Layout */
.topbar{
  position:sticky;top:0;z-index:10;display:flex;align-items:center;gap:10px;
  padding:calc(12px + env(safe-area-inset-top)) calc(16px + env(safe-area-inset-right)) 12px calc(16px + env(safe-area-inset-left));
  background:var(--bar-bg);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
main{max-width:var(--maxw);margin:0 auto;padding:16px 16px 96px}
.tabbar{
  position:fixed;bottom:0;left:0;right:0;display:flex;z-index:10;
  background:var(--bar-bg);backdrop-filter:blur(12px);
  border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom);
}
.tab{
  flex:1;background:none;border:0;color:var(--muted);font-size:12px;font-weight:600;
  padding:13px 4px 11px;cursor:pointer;position:relative;transition:color .15s;
}
.tab.active{color:var(--text)}
.tab.active::after{content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:34px;height:3px;border-radius:0 0 4px 4px;background:var(--grad)}

/* Cards & controls */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:16px;margin-bottom:14px;box-shadow:var(--card-shadow)}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.row>*{flex:1}
h2{font-size:17px;margin:0 0 12px}
h3{font-size:12px;margin:18px 0 8px;color:var(--blue);text-transform:uppercase;letter-spacing:.08em;font-weight:700}
label{display:block;font-size:13px;color:var(--muted);margin-bottom:10px}
input,select,button,textarea{font:inherit}
input,select,textarea{
  width:100%;margin-top:4px;background:var(--card2);color:var(--text);font-size:16px;
  border:1px solid var(--line);border-radius:11px;padding:10px 12px;transition:border-color .15s,box-shadow .15s;
}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--green);
  box-shadow:0 0 0 3px var(--focus-ring)}
.btn{
  background:var(--card2);color:var(--text);border:1px solid var(--line);
  border-radius:11px;padding:10px 14px;cursor:pointer;width:auto;font-weight:600;transition:transform .08s,border-color .15s,filter .15s;
}
.btn:hover{border-color:var(--green)}
.btn:active{transform:scale(.97)}
.btn.primary{background:var(--grad);border:0;color:var(--primary-btn-text);width:100%;margin-top:6px;
  box-shadow:0 8px 22px rgba(21,224,138,.35)}
.btn.primary:hover{filter:brightness(1.06)}
.btn.ghost{background:none}
.btn.small{padding:6px 10px;font-size:13px}
.btn.danger{color:var(--bad);border-color:transparent;background:none}
.btn.danger:hover{border-color:var(--bad)}

/* Dashboard */
.hero{text-align:center;padding:26px 16px 20px;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:
  radial-gradient(420px 200px at 50% -40%, var(--hero-glow), transparent 70%);pointer-events:none}
.hero .net{font-size:52px;font-weight:800;line-height:1;letter-spacing:-.03em;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .unit{font-size:13px;color:var(--muted);margin-top:4px}
.statgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:18px}
.stat{background:var(--card2);border:1px solid var(--line);border-radius:13px;padding:13px 8px;text-align:center}
.stat b{display:block;font-size:19px;font-weight:800}
.stat span{font-size:10px;color:var(--muted);letter-spacing:.06em;font-weight:700}
.stat--in b{color:var(--green)}
.stat--out b{color:var(--blue)}
.stat--w b{color:var(--yellow)}
.bar{height:12px;border-radius:8px;background:var(--card2);overflow:hidden;margin-top:16px;border:1px solid var(--line)}
.bar>i{display:block;height:100%;background:var(--grad);transition:width .4s ease;border-radius:8px}
.bar.over>i{background:var(--grad-warm)}
.pill{display:inline-block;font-size:11px;padding:2px 8px;border-radius:999px;background:var(--card2);color:var(--muted)}

/* Lists */
.list{list-style:none;margin:0;padding:0}
.item{display:flex;align-items:center;gap:10px;padding:11px 0;border-bottom:1px solid var(--line)}
.item:last-child{border-bottom:0}
.item .grow{flex:1;min-width:0}
.item .grow .t{font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.item .grow .s{font-size:12px;color:var(--muted)}
.item .k{font-variant-numeric:tabular-nums;white-space:nowrap;font-weight:700}
.meal-h{display:flex;justify-content:space-between;margin:16px 0 4px;font-size:12px;color:var(--blue);
  text-transform:uppercase;letter-spacing:.06em;font-weight:700}
.results{margin-top:8px;max-height:340px;overflow:auto}
.res{display:flex;align-items:center;gap:10px;padding:9px;border-radius:11px;cursor:pointer;transition:background .12s}
.res:hover{background:var(--card2)}
.datebar{display:flex;align-items:center;gap:8px;justify-content:center;margin-bottom:14px}
.dpick-wrap{position:relative;display:inline-flex}
.dpick{display:inline-flex;align-items:center;gap:7px;white-space:nowrap;min-width:140px;justify-content:center}
.dpick svg{opacity:.85;flex:0 0 auto}
.dpick-input{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:pointer;border:0;padding:0;margin:0}
canvas{max-width:100%}
.center{text-align:center}
.tag{font-size:10px;border:1px solid var(--line);border-radius:7px;padding:1px 6px;color:var(--muted);font-weight:700}
.tag.off{color:var(--blue);border-color:var(--blue)}
.tag.saved{color:var(--green);border-color:var(--green)}
.net-banner{position:fixed;left:0;right:0;bottom:58px;z-index:20;text-align:center;
  font-size:12px;font-weight:700;padding:8px 12px;background:#ffd23f;color:#3a2c00}
@media(min-width:560px){ .res{padding:11px} }