:root{
  --radius:16px;
  --mono:ui-monospace,SFMono-Regular,Menlo,monospace;
}

/* ===== Dark theme (default) ===== */
:root,:root[data-theme="dark"]{
  color-scheme:dark;
  --bg:#111c28; --surface:#182635; --surface2:#1f3243; --line:#2b3e52;
  --text:#eef3f8; --muted:#8fa0b3; --accent:#1f9bf0; --accent2:#12b981;
  --good:#12b981; --danger:#f87171;
  --btn-ink:#0e1116;
  --ok-bg:rgba(52,211,153,.12); --err-bg:rgba(248,113,113,.12);
  --warn-bg:rgba(246,173,85,.12); --warn-line:rgba(246,173,85,.3); --warn-text:#f6ad55;
  --toast-bg:#0b0e12; --toast-line:var(--line);
}

/* ===== Light theme — ShapeShift "Sunburst" brandkit ===== */
:root[data-theme="light"]{
  color-scheme:light;
  --bg:#F8F6F5; --surface:#FFFFFF; --surface2:#F1ECE7; --line:#E4DED7;
  --text:#211C17; --muted:#796C5D; --accent:#FB7B1E; --accent2:#14B8A6;
  --good:#0E9E88; --danger:#D92D20;
  --btn-ink:#211C17;
  --ok-bg:rgba(20,184,166,.12); --err-bg:rgba(217,45,32,.10);
  --warn-bg:#FFF4E5; --warn-line:#F3D8B0; --warn-text:#B45309;
  --toast-bg:#211C17; --toast-line:#3a332b;
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--text);
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  -webkit-text-size-adjust:100%;}
body{padding-top:env(safe-area-inset-top);padding-bottom:env(safe-area-inset-bottom)}
#app{max-width:560px;margin:0 auto;padding:14px}
button{font-family:inherit;cursor:pointer}
input{font-family:inherit}

.ss-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.ss-brand{display:flex;align-items:center;gap:10px}
.ss-brand img{width:32px;height:32px;border-radius:9px}
.ss-title{font-weight:800;font-size:19px;letter-spacing:-.3px;
  background:linear-gradient(110deg,var(--accent),var(--accent2));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.ss-sub{font-size:12px;color:var(--muted);margin-top:-2px;letter-spacing:.5px;text-transform:uppercase}
.ss-headbtns{display:flex;gap:8px}
.ss-ghost{background:transparent;color:var(--muted);border:1px solid var(--line);
  padding:8px 12px;border-radius:10px;font-size:13px}

.ss-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin-bottom:12px}
.ss-card h2{font-size:13px;text-transform:uppercase;letter-spacing:1px;color:var(--muted);margin:0 0 12px}
.ss-rowtop{display:flex;align-items:center;justify-content:space-between}
.ss-rowtop h2{margin-bottom:0}

.ss-primary{background:linear-gradient(110deg,var(--accent),var(--accent2));color:var(--btn-ink);font-weight:700;
  border:0;padding:12px 16px;border-radius:12px;font-size:15px;flex:1}
.ss-primary:disabled{opacity:.6}
.ss-scanrow{display:flex;gap:10px;align-items:center}
.ss-thumb{width:48px;height:48px;object-fit:cover;border-radius:10px;border:1px solid var(--line)}
.ss-hint{font-size:12px;color:var(--muted);margin:10px 0 0}
.ss-note{font-size:13px;margin:10px 0 0;padding:8px 10px;border-radius:10px}
.ss-note.ok{background:var(--ok-bg);color:var(--good)}
.ss-note.err{background:var(--err-bg);color:var(--danger)}
.ss-bar{height:4px;border-radius:4px;background:var(--surface2);overflow:hidden;margin-top:12px}
.ss-bar i{display:block;height:100%;width:40%;border-radius:4px;
  background:linear-gradient(90deg,var(--accent),var(--accent2));animation:slide 1.1s infinite}
@keyframes slide{0%{margin-left:-40%}100%{margin-left:100%}}

.ss-people{display:flex;flex-wrap:wrap;gap:8px}
.ss-person{display:flex;align-items:center;gap:6px;background:var(--surface2);border:1px solid var(--line);
  border-left-width:3px;border-radius:10px;padding:6px 8px}
.ss-personinput{background:transparent;border:0;color:var(--text);width:84px;font-size:14px;outline:none}
.ss-dot{width:9px;height:9px;border-radius:50%;flex:none}
.ss-x{background:transparent;border:0;color:var(--muted);font-size:13px;padding:2px 4px}
.ss-add{background:var(--surface2);color:var(--text);border:1px dashed var(--line);border-radius:10px;padding:9px 14px;font-size:14px;margin-top:8px}
.ss-empty{color:var(--muted);font-size:14px;margin:4px 0}

.ss-item{background:var(--surface2);border:1px solid var(--line);border-radius:12px;padding:10px;margin-bottom:8px}
.ss-itemmain{display:flex;align-items:center;gap:8px}
.ss-itemname{flex:1;background:transparent;border:0;border-bottom:1px solid var(--line);color:var(--text);font-size:14px;padding:4px 2px;outline:none}
.ss-price{display:flex;align-items:center;gap:2px;background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:4px 8px}
.ss-price.wide{min-width:120px}
.ss-price span{color:var(--muted);font-size:13px}
.ss-price input{width:64px;background:transparent;border:0;color:var(--text);font-family:var(--mono);font-size:14px;text-align:right;outline:none}
.ss-price.wide input{width:90px}
.ss-assign{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}
.ss-chip{background:var(--bg);border:1px solid var(--line);color:var(--muted);border-radius:20px;padding:4px 12px;font-size:12px;font-weight:600}
.ss-subtotal{display:flex;justify-content:space-between;margin-top:10px;padding-top:10px;border-top:1px dashed var(--line);font-size:14px;color:var(--muted)}
.ss-subtotal b{color:var(--text);font-family:var(--mono)}

.ss-field{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px;gap:10px}
.ss-field label{font-size:14px;color:var(--muted)}
.ss-tipbtns{display:flex;gap:6px;flex-wrap:wrap;justify-content:flex-end}
.ss-tipbtn{background:var(--surface2);border:1px solid var(--line);color:var(--text);border-radius:9px;padding:7px 11px;font-size:13px;font-weight:600}
.ss-tipbtn.on{background:linear-gradient(110deg,var(--accent),var(--accent2));color:var(--btn-ink);border-color:transparent}
.ss-toggle{display:flex;align-items:center;gap:7px;font-size:13px;color:var(--muted);cursor:pointer}
.ss-toggle input{accent-color:var(--accent)}
.ss-tipout{font-size:14px;color:var(--muted);margin-top:6px;text-align:right}
.ss-tipout b{font-family:var(--mono);color:var(--text)}

.ss-result{display:flex;align-items:center;gap:10px;padding:10px 0;border-bottom:1px dashed var(--line)}
.ss-rname{font-weight:600;font-size:15px;flex:none;min-width:60px}
.ss-rbreak{flex:1;color:var(--muted);font-size:11px;font-family:var(--mono)}
.ss-rtot{font-weight:700;font-size:16px;font-family:var(--mono)}
.ss-grand{display:flex;align-items:center;gap:10px;margin-top:14px;padding-top:12px;border-top:2px solid var(--line);font-weight:800;font-size:18px}
.ss-balance{flex:1;font-size:11px;font-weight:600;color:var(--good);text-transform:uppercase;letter-spacing:.5px}
.ss-balance.bad{color:var(--danger)}
.ss-grandtot{font-size:20px;font-family:var(--mono);
  background:linear-gradient(110deg,var(--accent),var(--accent2));-webkit-background-clip:text;background-clip:text;color:transparent}

.ss-share{display:flex;gap:8px;margin-bottom:10px}
.ss-share-btn{border:0;border-radius:12px;padding:12px;font-weight:700;font-size:14px;color:#0e1116;flex:1}
.ss-share-btn.wa{background:#25d366}
.ss-share-btn.em{background:#f6ad55}
.ss-save{width:100%;background:var(--surface2);border:1px solid var(--line);color:var(--text);border-radius:12px;padding:11px;font-size:14px;font-weight:600}

.ss-hist{display:flex;align-items:center;gap:10px;padding:10px 0;border-bottom:1px dashed var(--line)}
.ss-hist-thumb{width:42px;height:42px;border-radius:9px;object-fit:cover;border:1px solid var(--line);flex:none}
.ss-noimg{display:flex;align-items:center;justify-content:center;background:var(--surface2);font-size:18px}
.ss-hist-meta{flex:1}
.ss-hist-label{font-size:13px}
.ss-hist-tot{font-size:12px;color:var(--muted);font-family:var(--mono)}
.ss-mini{background:var(--surface2);border:1px solid var(--line);color:var(--text);border-radius:8px;padding:6px 10px;font-size:12px}
.ss-mini.ss-danger{color:var(--danger)}

/* modal */
.ss-modal{position:fixed;inset:0;background:rgba(0,0,0,.6);display:flex;align-items:flex-end;justify-content:center;z-index:40}
.ss-sheet{background:var(--surface);border:1px solid var(--line);border-radius:18px 18px 0 0;width:100%;max-width:560px;padding:18px;padding-bottom:calc(18px + env(safe-area-inset-bottom))}
.ss-sheet h3{margin:0 0 4px;font-size:17px}
.ss-sheet p{color:var(--muted);font-size:13px;margin:0 0 14px}
.ss-label{display:block;font-size:12px;color:var(--muted);margin:12px 0 6px;text-transform:uppercase;letter-spacing:.5px}
.ss-input{width:100%;background:var(--bg);border:1px solid var(--line);border-radius:10px;color:var(--text);padding:11px;font-size:14px;outline:none}
.ss-input:focus{border-color:var(--accent)}
.ss-warn{background:var(--warn-bg);border:1px solid var(--warn-line);color:var(--warn-text);font-size:12px;padding:10px;border-radius:10px;margin-top:14px;line-height:1.4}
.ss-modalbtns{display:flex;gap:8px;margin-top:16px}
.ss-modalbtns button{flex:1;border-radius:11px;padding:12px;font-size:14px;font-weight:700;border:0}
.ss-cancel{background:var(--surface2);color:var(--text);border:1px solid var(--line)!important}
.ss-modelrow{display:flex;gap:8px;margin-top:6px}
.ss-modelrow button{flex:1;background:var(--surface2);border:1px solid var(--line);color:var(--text);border-radius:9px;padding:9px;font-size:13px}
.ss-modelrow button.on{background:linear-gradient(110deg,var(--accent),var(--accent2));color:var(--btn-ink);border-color:transparent}

.ss-toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);background:var(--toast-bg);border:1px solid var(--toast-line);
  color:var(--text);padding:10px 16px;border-radius:12px;font-size:13px;box-shadow:0 8px 30px rgba(0,0,0,.5);z-index:60}
.ss-foot{text-align:center;color:var(--muted);font-size:11px;padding:8px 0 20px}
.ss-install{display:none;width:100%;margin-bottom:12px;background:var(--surface2);border:1px dashed var(--accent);color:var(--text);border-radius:12px;padding:11px;font-size:13px;font-weight:600}

button:focus-visible,input:focus-visible{outline:2px solid var(--accent);outline-offset:1px}
@media(prefers-reduced-motion:reduce){.ss-bar i{animation:none;width:100%}}