:root{
  --bg:#f4f6f5; --surface:#ffffff; --surface-2:#f0f3f1; --text:#16201b; --muted:#66736c; --line:#e2e8e4;
  --brand:#16a34a; --brand-ink:#ffffff; --brand-soft:#dcfce7;
  --protein:#2563eb; --carbs:#d97706; --fat:#db2777; --water:#0ea5e9; --danger:#dc2626; --warn:#f59e0b;
  --radius:16px; --shadow:0 1px 2px rgba(0,0,0,.04),0 4px 16px rgba(0,0,0,.05);
  --nav-h:64px;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Inter, sans-serif;
}
@media (prefers-color-scheme: dark){
  :root{ --bg:#0d1210; --surface:#151c18; --surface-2:#1c2520; --text:#e8efea; --muted:#94a39a; --line:#26312b;
    --brand:#22c55e; --brand-ink:#05200f; --brand-soft:#123321; --shadow:none; }
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--text);-webkit-text-size-adjust:100%}
body{min-height:100dvh}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
a{color:var(--brand)}
.hidden{display:none!important}

/* layout */
.app-shell{max-width:640px;margin:0 auto;padding:calc(env(safe-area-inset-top) + 8px) 16px calc(var(--nav-h) + env(safe-area-inset-bottom) + 24px)}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:8px 0 12px}
.topbar h1{font-size:22px;margin:0;letter-spacing:-.01em}
.brand{display:flex;align-items:center;gap:10px}
.logo-mark{width:32px;height:32px;border-radius:10px;background:var(--brand);color:var(--brand-ink);display:grid;place-items:center;font-weight:800;font-size:18px}
.logo-mark.big{width:72px;height:72px;border-radius:22px;font-size:40px}
.splash{min-height:100dvh;display:grid;place-items:center}

.card{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--line);padding:16px;margin-bottom:12px}
.card h2{font-size:16px;margin:0 0 10px;display:flex;align-items:center;justify-content:space-between;gap:8px}
.card h2 .sub{font-weight:500;color:var(--muted);font-size:14px}
.muted{color:var(--muted)}
.small{font-size:13px}
.row{display:flex;align-items:center;gap:8px}
.row.between{justify-content:space-between}
.grow{flex:1;min-width:0}
.stack>*+*{margin-top:10px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}

/* buttons & inputs */
.btn{border:0;border-radius:12px;padding:12px 16px;font-weight:600;background:var(--surface-2);color:var(--text);display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:44px}
.btn.primary{background:var(--brand);color:var(--brand-ink)}
.btn.danger{background:transparent;color:var(--danger);border:1px solid var(--line)}
.btn.ghost{background:transparent}
.btn.block{width:100%}
.btn.sm{padding:6px 12px;min-height:34px;border-radius:10px;font-size:14px}
.btn:disabled{opacity:.5;cursor:default}
.icon-btn{border:0;background:var(--surface-2);width:40px;height:40px;border-radius:12px;display:grid;place-items:center;font-size:18px}
.link-btn{border:0;background:none;color:var(--brand);font-weight:600;padding:6px 0}
label.field{display:block}
label.field>span{display:block;font-size:13px;color:var(--muted);margin:0 0 4px 2px}
.input,select.input,textarea.input{width:100%;border:1px solid var(--line);background:var(--surface);border-radius:12px;padding:11px 12px;min-height:44px;outline:none}
.input:focus{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}
.seg{display:flex;background:var(--surface-2);border-radius:12px;padding:3px;gap:3px}
.seg button{flex:1;border:0;background:transparent;border-radius:10px;padding:8px 6px;font-weight:600;color:var(--muted);font-size:14px}
.seg button.on{background:var(--surface);color:var(--text);box-shadow:var(--shadow)}

/* auth */
.auth-wrap{min-height:100dvh;display:grid;place-items:center;padding:24px 16px}
.auth-card{width:100%;max-width:400px}
.auth-card .hero{text-align:center;margin-bottom:18px}
.auth-card .hero h1{margin:12px 0 4px;font-size:28px}
.error{color:var(--danger);font-size:14px;min-height:1em}

/* date nav */
.datenav{display:flex;align-items:center;justify-content:space-between;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:4px;margin-bottom:12px}
.datenav button{border:0;background:none;width:44px;height:40px;border-radius:10px;font-size:20px}
.datenav .label{font-weight:700;text-align:center;flex:1;border:0;background:none;height:40px}

/* summary */
.summary{display:flex;gap:16px;align-items:center}
.ring{position:relative;width:132px;height:132px;flex:none}
.ring svg{transform:rotate(-90deg)}
.ring .center{position:absolute;inset:0;display:grid;place-items:center;text-align:center}
.ring .num{font-size:28px;font-weight:800;line-height:1}
.ring .lbl{font-size:12px;color:var(--muted);margin-top:2px}
.formula{display:grid;grid-template-columns:1fr auto 1fr auto 1fr;gap:4px;align-items:center;text-align:center;font-size:13px;margin-top:12px;padding-top:12px;border-top:1px solid var(--line)}
.formula b{display:block;font-size:16px}
.formula .op{color:var(--muted);font-weight:700}
.macros{flex:1;min-width:0}
.macro{margin-bottom:9px}
.macro .row{font-size:13px}
.bar{height:8px;background:var(--surface-2);border-radius:99px;overflow:hidden;margin-top:4px}
.bar>i{display:block;height:100%;border-radius:99px;transition:width .3s}

/* meals */
.meal-head{display:flex;justify-content:space-between;align-items:baseline}
.meal-head h2{margin:0}
.entry{display:flex;align-items:center;gap:10px;padding:10px 0;border-top:1px solid var(--line)}
.entry:first-of-type{border-top:0}
.entry .name{font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.entry .meta{font-size:13px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.entry .kcal{font-weight:700;white-space:nowrap}
.entry.clickable{cursor:pointer}
.add-row{display:flex;gap:8px;margin-top:8px}
.empty{color:var(--muted);font-size:14px;padding:6px 0}

/* water */
.water-glasses{display:flex;flex-wrap:wrap;gap:6px;margin:6px 0 10px}
.glass{width:26px;height:32px;border:2px solid var(--water);border-top-width:0;border-radius:0 0 7px 7px;position:relative;overflow:hidden;opacity:.9}
.glass.full::after{content:"";position:absolute;left:0;right:0;bottom:0;height:80%;background:var(--water);opacity:.75}

/* bottom nav */
.bottomnav{position:fixed;left:0;right:0;bottom:0;background:color-mix(in srgb,var(--surface) 92%,transparent);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom);z-index:20}
.bottomnav .inner{max-width:640px;margin:0 auto;display:grid;grid-template-columns:repeat(5,1fr);height:var(--nav-h)}
.bottomnav button{border:0;background:none;color:var(--muted);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;font-size:11px;font-weight:600}
.bottomnav button svg{width:24px;height:24px}
.bottomnav button.on{color:var(--brand)}
.bottomnav .fab{width:52px;height:52px;border-radius:18px;background:var(--brand);color:var(--brand-ink);display:grid;place-items:center;margin:auto;box-shadow:0 6px 16px rgba(22,163,74,.35)}
.bottomnav .fab svg{width:28px;height:28px}

/* sheet */
.sheet-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:40;display:flex;align-items:flex-end;justify-content:center;animation:fade .15s}
.sheet{background:var(--bg);width:100%;max-width:640px;max-height:92dvh;border-radius:22px 22px 0 0;display:flex;flex-direction:column;animation:up .2s ease-out;padding-bottom:env(safe-area-inset-bottom)}
.sheet-head{display:flex;align-items:center;gap:8px;padding:14px 16px 10px;border-bottom:1px solid var(--line)}
.sheet-head h3{margin:0;font-size:18px;flex:1}
.sheet-body{overflow:auto;padding:14px 16px 20px;-webkit-overflow-scrolling:touch}
@media (min-width:700px){ .sheet-backdrop{align-items:center} .sheet{border-radius:22px;max-height:86dvh} }
@keyframes up{from{transform:translateY(30px);opacity:.6}to{transform:none;opacity:1}}
@keyframes fade{from{opacity:0}to{opacity:1}}

.list-item{display:flex;align-items:center;gap:10px;padding:11px 12px;background:var(--surface);border:1px solid var(--line);border-radius:12px;margin-bottom:8px;cursor:pointer;text-align:left;width:100%}
.list-item:active{transform:scale(.995)}
.list-item .name{font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.list-item .meta{font-size:13px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.pill{font-size:12px;font-weight:600;padding:3px 8px;border-radius:99px;background:var(--surface-2);color:var(--muted);white-space:nowrap}
.pill.ok{background:var(--brand-soft);color:var(--brand)}
.pill.warn{background:#fef3c7;color:#92400e}
.section-title{font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);margin:16px 2px 8px}

.nutri{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;text-align:center}
.nutri div{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:10px 4px}
.nutri b{display:block;font-size:18px}
.nutri span{font-size:12px;color:var(--muted)}

/* scanner */
.scanner{position:relative;background:#000;border-radius:16px;overflow:hidden;aspect-ratio:4/3}
.scanner video{width:100%;height:100%;object-fit:cover;display:block}
.scanner .frame{position:absolute;left:12%;right:12%;top:30%;bottom:30%;border:3px solid rgba(255,255,255,.9);border-radius:12px;box-shadow:0 0 0 999px rgba(0,0,0,.35)}

/* chart */
.chart{width:100%;height:auto;display:block}
.chart text{fill:var(--muted);font-size:10px}
.legend{display:flex;gap:12px;font-size:12px;color:var(--muted);flex-wrap:wrap}
.legend i{display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:4px;vertical-align:-1px}

.toast{position:fixed;left:50%;bottom:calc(var(--nav-h) + env(safe-area-inset-bottom) + 16px);transform:translateX(-50%) translateY(20px);background:var(--text);color:var(--bg);padding:10px 16px;border-radius:12px;font-weight:600;font-size:14px;opacity:0;pointer-events:none;transition:.2s;z-index:60;max-width:90vw}
.toast.show{opacity:1;transform:translateX(-50%)}
.spinner{width:22px;height:22px;border:3px solid var(--line);border-top-color:var(--brand);border-radius:50%;animation:spin .8s linear infinite;margin:16px auto}
@keyframes spin{to{transform:rotate(360deg)}}
.notice{background:var(--brand-soft);color:var(--text);border-radius:12px;padding:12px;font-size:14px}
.stat{background:var(--surface-2);border-radius:12px;padding:10px;text-align:center}
.stat b{display:block;font-size:20px}
.stat span{font-size:12px;color:var(--muted)}