:root{--bg:#f6f7f9;--card:#fff;--ink:#14161a;--mute:#6b7280;--line:#e5e7eb;--brand:#10b981;--brand-ink:#04281d;--pos:#047857;--bad:#e11d48;
  --ease:cubic-bezier(.2,.8,.2,1);color-scheme:light dark}
@media (prefers-color-scheme:dark){:root{--bg:#0f1115;--card:#181b21;--ink:#f1f3f5;--mute:#9aa3af;--line:#272b33;--pos:#34d399;--bad:#fb7185}}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;overscroll-behavior:none}
html,body{margin:0;background:var(--bg);color:var(--ink);font:1rem/1.4 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif}
body{overscroll-behavior:none}
#app{max-width:560px;margin:0 auto;padding:env(safe-area-inset-top,0px) 16px calc(104px + env(safe-area-inset-bottom,0px))}
#app.pad-top{padding-top:calc(16px + env(safe-area-inset-top,0px))}

/* type: tighter tracking as size grows */
h1{font-size:1.75rem;line-height:1.1;letter-spacing:-.02em;margin:8px 0 4px}
h2{font-size:1.125rem;line-height:1.2;letter-spacing:-.01em;margin:20px 0 8px}
.mute{color:var(--mute)}.small{font-size:.8125rem}.right{text-align:right}.row{display:flex;align-items:center;gap:10px}.grow{flex:1;min-width:0}
.pos{color:var(--pos)}.neg{color:var(--bad)}

/* translucent top bar: content scrolls underneath */
.topbar{position:sticky;top:calc(-1 * env(safe-area-inset-top,0px));z-index:20;display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin:calc(-1 * env(safe-area-inset-top,0px)) -16px 8px;padding:calc(6px + env(safe-area-inset-top,0px)) 16px 6px;
  background:color-mix(in srgb,var(--bg) 72%,transparent);-webkit-backdrop-filter:blur(20px) saturate(180%);backdrop-filter:blur(20px) saturate(180%);
  border-bottom:1px solid color-mix(in srgb,var(--line) 60%,transparent)}
.topbar .back{padding-left:0;min-height:44px}

.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:14px;margin:10px 0}
.card.tap{cursor:pointer}
label{display:block;font-size:.8125rem;color:var(--mute)}
input,select{width:100%;font:inherit;font-size:16px;color:inherit;background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:12px;margin:4px 0 10px;min-height:44px}
input:focus-visible,select:focus-visible,button:focus-visible,.tap:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-color:transparent}

button{position:relative;font:inherit;border:0;border-radius:12px;padding:12px 16px;min-height:44px;background:var(--brand);color:var(--brand-ink);font-weight:600;cursor:pointer}
button.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
button.danger{background:transparent;color:var(--bad);border:1px solid var(--line)}
button.small{min-height:36px;padding:8px 14px;font-size:.8125rem}
button:disabled{opacity:.5}
button.block{width:100%}

/* touch: instant press feedback, no double-tap delay, controls aren't text */
button,a,[role=button],[role=tab],.tap,.chip{touch-action:manipulation;user-select:none;-webkit-user-select:none;-webkit-touch-callout:none}
button,.card.tap{transition:transform 120ms var(--ease),opacity 120ms,background-color 120ms}
button:active{transform:scale(.96);opacity:.85}
.card.tap:active{transform:scale(.985);opacity:.8}
.fab:active{transform:translateX(-50%) scale(.96)}

.code{font:700 2.125rem/1 ui-monospace,Menlo,monospace;letter-spacing:.18em;user-select:text}
.codebox{text-align:center;padding:18px}
.codein{text-align:center;font:700 1.625rem ui-monospace,Menlo,monospace;letter-spacing:.2em;text-transform:uppercase}

.tabs{display:flex;gap:6px;margin:14px 0;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:4px}
.tabs button{flex:1;background:transparent;color:var(--mute);padding:8px}
.tabs button.on{background:var(--brand);color:var(--brand-ink)}

/* chips: ~34px visual, 44px hit area via the pseudo-element */
.chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px}
.chip{position:relative;min-height:0;padding:7px 13px;border-radius:99px;border:1px solid var(--line);background:transparent;color:var(--mute);font-weight:500;font-size:.8125rem}
.chip::after,button.small::after{content:"";position:absolute;inset:-5px}
.chip.on{background:var(--brand);color:var(--brand-ink);border-color:var(--brand)}

.item{display:grid;grid-template-columns:1fr 104px 44px;gap:8px;align-items:start}
.item input{margin:0}
.x{background:transparent;color:var(--mute);padding:0;width:44px}
.fab{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(20px + env(safe-area-inset-bottom,0px));box-shadow:0 8px 24px rgba(0,0,0,.25);padding:14px 22px;border-radius:99px;z-index:15}
.total{display:flex;justify-content:space-between;font-weight:700;font-size:1.125rem}

#toast{position:fixed;left:50%;bottom:calc(88px + env(safe-area-inset-bottom,0px));transform:translateX(-50%) translateY(20px);display:flex;align-items:center;gap:12px;
  background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:14px;opacity:0;pointer-events:none;transition:opacity .2s var(--ease),transform .2s var(--ease);max-width:92%;z-index:30}
#toast.show{opacity:1;transform:translateX(-50%);pointer-events:auto}
#toast button{background:transparent;color:var(--brand);padding:0 4px;min-height:36px}
.err{color:var(--bad);font-size:.875rem;min-height:20px}
.scan{border:2px dashed var(--line);border-radius:16px;padding:14px;text-align:center;margin:10px 0}
.scan .row{gap:8px}.scan .row button{flex:1}
.back{background:transparent;color:var(--mute);padding:8px 0;font-weight:500}
.chips .chip[aria-pressed=true]{background:var(--brand);color:var(--brand-ink);border-color:var(--brand)}

@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms!important;animation-duration:.01ms!important}
  button:active,.card.tap:active{transform:none}
}
@media (prefers-reduced-transparency:reduce){.topbar{background:var(--bg);-webkit-backdrop-filter:none;backdrop-filter:none}}
@media (prefers-contrast:more){:root{--line:#8b919a}}
.topbar .back{max-width:62%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
summary{cursor:pointer;min-height:44px;display:flex;align-items:center;color:var(--mute);font-weight:500;list-style:none}
summary::-webkit-details-marker{display:none}
details[open]>summary{margin-bottom:6px}

.scan{transition:border-color 120ms var(--ease),background-color 120ms var(--ease)}
.scan.drag{border-color:var(--brand);background:color-mix(in srgb,var(--brand) 10%,transparent)}
.thumb{display:block;margin:10px auto 0;max-height:96px;max-width:100%;border-radius:10px;border:1px solid var(--line)}
.desk-only{display:none}
@media (hover:hover) and (pointer:fine){.desk-only{display:block}}

.pastebox{margin-top:10px;min-height:56px;display:flex;align-items:center;justify-content:center;padding:14px;border:1px dashed var(--brand);border-radius:12px;font-size:16px;color:var(--mute);outline:none;-webkit-user-select:text;user-select:text}
.pastebox:empty::before{content:attr(data-placeholder)}