/* AI Diet & Fitness Coach — mobile-first UI */
:root{
  --bg:#0f1115; --surface:#171a21; --surface2:#1e222b; --line:#2a2f3a;
  --text:#eef1f6; --muted:#9aa3b2; --brand:#22c55e; --brand2:#16a34a;
  --cal:#22c55e; --pro:#38bdf8; --carb:#f59e0b; --fat:#f472b6; --water:#3b82f6;
  --danger:#ef4444; --radius:16px; --shadow:0 6px 24px rgba(0,0,0,.28);
  --maxw:520px;
}
:root:not([data-theme="dark"]) @media (prefers-color-scheme: light){}
@media (prefers-color-scheme: light){
  :root:not([data-theme="dark"]){
    --bg:#f4f6fa; --surface:#ffffff; --surface2:#f0f3f8; --line:#e3e8f0;
    --text:#131722; --muted:#5b6472; --shadow:0 6px 20px rgba(20,30,50,.08);
  }
}
:root[data-theme="light"]{
  --bg:#f4f6fa; --surface:#ffffff; --surface2:#f0f3f8; --line:#e3e8f0;
  --text:#131722; --muted:#5b6472; --shadow:0 6px 20px rgba(20,30,50,.08);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{background:var(--bg);color:var(--text);font:15px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased}
.app{max-width:var(--maxw);margin:0 auto;min-height:100vh;padding:0 16px 88px;position:relative}
h1,h2,h3{margin:0 0 .4em}
h1{font-size:22px}h2{font-size:18px}h3{font-size:15px}
.muted{color:var(--muted)}
.small{font-size:12.5px}
button{font:inherit;cursor:pointer}
.hidden{display:none!important}

/* top bar */
.topbar{display:flex;align-items:center;justify-content:space-between;padding:18px 2px 8px;position:sticky;top:0;background:linear-gradient(var(--bg),var(--bg) 70%,transparent);z-index:5}
.topbar .brand{font-weight:700;font-size:16px;display:flex;gap:8px;align-items:center}
.logo{width:26px;height:26px;border-radius:8px;background:linear-gradient(135deg,var(--brand),var(--brand2));display:grid;place-items:center;color:#04120a;font-weight:900}
.chip{font-size:11px;padding:3px 8px;border-radius:999px;background:var(--surface2);color:var(--muted);border:1px solid var(--line)}

/* cards */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin:12px 0;box-shadow:var(--shadow)}
.card.tight{padding:12px}
.row{display:flex;gap:12px}.row.wrap{flex-wrap:wrap}.row.between{justify-content:space-between;align-items:center}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.grow{flex:1}

/* buttons */
.btn{border:1px solid var(--line);background:var(--surface2);color:var(--text);padding:11px 14px;border-radius:12px;font-weight:600;display:inline-flex;gap:8px;align-items:center;justify-content:center}
.btn.primary{background:linear-gradient(135deg,var(--brand),var(--brand2));border-color:transparent;color:#04120a}
.btn.block{width:100%}
.btn.ghost{background:transparent}
.btn.sm{padding:7px 10px;font-size:13px;border-radius:10px}
.btn.danger{color:var(--danger);border-color:var(--danger)}
.btn:active{transform:translateY(1px)}

/* inputs */
label{display:block;font-size:12.5px;color:var(--muted);margin:10px 0 4px}
input,select,textarea{width:100%;background:var(--surface2);border:1px solid var(--line);color:var(--text);padding:11px 12px;border-radius:12px;font:inherit}
input:focus,select:focus,textarea:focus{outline:2px solid color-mix(in srgb,var(--brand) 55%,transparent);border-color:transparent}
.pillset{display:flex;flex-wrap:wrap;gap:8px}
.pill{padding:8px 12px;border-radius:999px;border:1px solid var(--line);background:var(--surface2);color:var(--text);font-size:13px}
.pill.on{background:color-mix(in srgb,var(--brand) 22%,var(--surface2));border-color:var(--brand);color:var(--text)}

/* rings */
.rings{display:flex;gap:14px;align-items:center;justify-content:space-around;flex-wrap:wrap}
.ring{--val:0;--col:var(--cal);width:96px;height:96px;border-radius:50%;
  background:conic-gradient(var(--col) calc(var(--val)*1%), var(--surface2) 0);
  display:grid;place-items:center;position:relative}
.ring::before{content:"";position:absolute;inset:9px;border-radius:50%;background:var(--surface)}
.ring .rc{position:relative;text-align:center;line-height:1.1}
.ring .rc b{font-size:18px}.ring .rc span{font-size:10.5px;color:var(--muted)}
.macro{display:flex;flex-direction:column;align-items:center;gap:6px;font-size:12px}
.bar{height:8px;border-radius:6px;background:var(--surface2);overflow:hidden}
.bar>i{display:block;height:100%;border-radius:6px}

/* big calorie */
.bigcal{text-align:center;padding:6px 0}
.bigcal .n{font-size:40px;font-weight:800;line-height:1}
.bigcal .n small{font-size:16px;color:var(--muted);font-weight:600}

/* list items */
.item{display:flex;justify-content:space-between;align-items:center;padding:10px 0;border-bottom:1px solid var(--line)}
.item:last-child{border-bottom:0}
.item .k{font-size:12px;color:var(--muted)}
.tag{font-size:11px;padding:2px 7px;border-radius:6px;background:var(--surface2);color:var(--muted);border:1px solid var(--line)}
.conf-high{color:var(--brand)}.conf-med{color:var(--carb)}.conf-low{color:var(--danger)}

/* bottom nav */
.nav{position:fixed;left:0;right:0;bottom:0;z-index:20;background:var(--surface);border-top:1px solid var(--line)}
.nav .inner{max-width:var(--maxw);margin:0 auto;display:flex;justify-content:space-around;padding:6px 4px calc(6px + env(safe-area-inset-bottom))}
.nav a{flex:1;text-align:center;color:var(--muted);text-decoration:none;font-size:10.5px;padding:6px 2px;border:0;background:none}
.nav a .ic{display:block;font-size:20px;line-height:1.2}
.nav a.on{color:var(--brand)}
.nav a.scan{position:relative}
.nav a.scan .ic{width:46px;height:46px;margin:-18px auto 0;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#04120a;display:grid;place-items:center;box-shadow:var(--shadow);font-size:22px}

/* modal */
.modal{position:fixed;inset:0;z-index:40;background:rgba(0,0,0,.5);display:grid;place-items:end center;padding:0}
.sheet{width:100%;max-width:var(--maxw);background:var(--surface);border-radius:20px 20px 0 0;padding:18px 16px calc(20px + env(safe-area-inset-bottom));max-height:92vh;overflow:auto;border:1px solid var(--line)}
.sheet h2{display:flex;justify-content:space-between;align-items:center}
.x{background:var(--surface2);border:1px solid var(--line);border-radius:10px;width:34px;height:34px}

.banner{font-size:12.5px;background:color-mix(in srgb,var(--carb) 16%,var(--surface));border:1px solid color-mix(in srgb,var(--carb) 40%,var(--line));color:var(--text);padding:10px 12px;border-radius:12px;margin:10px 0}
.disclaimer{font-size:11.5px;color:var(--muted);text-align:center;padding:14px 8px}
.stepper{display:flex;gap:6px;margin:6px 0 14px}
.stepper i{height:4px;border-radius:3px;flex:1;background:var(--surface2)}
.stepper i.on{background:var(--brand)}
.center{text-align:center}
.spacer{height:8px}
canvas{width:100%;height:auto;display:block}

/* ---- Cal AI–style scan + meal cards ---- */
.scanhead{display:flex;gap:12px;align-items:center;padding:4px 0 6px}
.scanhead-ic{width:46px;height:46px;border-radius:14px;background:linear-gradient(135deg,var(--brand),var(--brand2));display:grid;place-items:center;font-size:22px;flex:none}
.filedrop{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;border:2px dashed var(--line);border-radius:16px;padding:26px 12px;margin-top:6px;cursor:pointer;color:var(--muted);text-align:center}
.filedrop:hover{border-color:var(--brand);color:var(--text)}
.filedrop-ic{width:40px;height:40px;border-radius:50%;background:var(--surface2);display:grid;place-items:center;font-size:24px;color:var(--brand)}
.scan-photo{width:100%;max-height:260px;object-fit:cover;border-radius:14px;display:block}
.mealitem{gap:10px;align-items:center}
.meal-thumb{width:44px;height:44px;border-radius:10px;object-fit:cover;flex:none;background:var(--surface2)}
.meal-thumb.ph{display:grid;place-items:center;font-size:20px;color:var(--muted)}
.spin{display:flex;gap:10px;align-items:center;justify-content:center;padding:18px 0}
.spinner{width:22px;height:22px;border-radius:50%;border:3px solid var(--surface2);border-top-color:var(--brand);animation:sp 0.8s linear infinite}
@keyframes sp{to{transform:rotate(360deg)}}