:root{
  --bg:#edf0f5; --surface:#ffffff; --sunk:#f3f5f9; --ink:#111827; --muted:#5b6678; --line:#d7dde8;
  --brand:#2638c4; --brand-ink:#ffffff; --brand-soft:#e8ebfb;
  --ok:#0d7a49; --ok-soft:#e3f5ec; --warn:#9a5b00; --warn-soft:#fdf1dc; --err:#b3261e; --err-soft:#fdeceb;
  --radius:14px; --shadow:0 1px 2px rgba(17,24,39,.06),0 8px 28px rgba(17,24,39,.07);
  --font:"Plus Jakarta Sans",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
@media (prefers-color-scheme:dark){
  :root{
    --bg:#0b101a; --surface:#141b29; --sunk:#0f1522; --ink:#e9edf5; --muted:#9aa6bb; --line:#26304a;
    --brand:#7e8dff; --brand-ink:#0b101a; --brand-soft:#1b2342;
    --ok:#4cc38a; --ok-soft:#10261d; --warn:#f0b04a; --warn-soft:#2a2112; --err:#ff8b84; --err-soft:#2c1514;
    --shadow:0 1px 2px rgba(0,0,0,.4),0 8px 28px rgba(0,0,0,.35);
  }
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:400 16px/1.55 var(--font);
  padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left)}
.shell{max-width:560px;margin:0 auto;padding:20px 16px 40px}
[hidden]{display:none!important}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* header */
.top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:4px 2px 18px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font-weight:700;font-size:1.15rem;letter-spacing:-.01em}
.mark{width:30px;height:30px;fill:var(--brand)}
.tag{margin:0;color:var(--muted);font-size:.82rem;text-align:right}
@media (max-width:420px){.tag{display:none}}

/* card + tabs */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.tabs{display:grid;grid-template-columns:1fr 1fr;border-bottom:1px solid var(--line);background:var(--sunk)}
.tab{appearance:none;border:0;background:transparent;color:var(--muted);font:600 .95rem/1 var(--font);padding:16px 12px;cursor:pointer;
  border-bottom:2px solid transparent;margin-bottom:-1px}
.tab:hover{color:var(--ink)}
.tab[aria-selected="true"]{color:var(--brand);background:var(--surface);border-bottom-color:var(--brand)}
.panel{padding:24px 22px 26px}
@media (max-width:420px){.panel{padding:20px 16px 22px}}

h1{margin:0 0 6px;font-size:1.45rem;line-height:1.25;letter-spacing:-.02em;font-weight:700}
.lead{margin:0 0 20px;color:var(--muted)}
.center{text-align:center}

/* kind selector */
.kinds{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-bottom:18px}
.kind{appearance:none;display:flex;align-items:center;justify-content:center;gap:8px;padding:11px 8px;border:1px solid var(--line);border-radius:10px;
  background:var(--surface);color:var(--ink);font:600 .93rem/1 var(--font);cursor:pointer}
.kind svg,.drop svg,.picked svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex:none}
.kind:hover{border-color:var(--brand)}
.kind[aria-pressed="true"]{background:var(--brand-soft);border-color:var(--brand);color:var(--brand)}

/* fields */
.field{margin-bottom:16px}
label,.label{display:block;margin-bottom:6px;font-weight:600;font-size:.92rem}
input[type=url],textarea{width:100%;padding:12px 13px;border:1px solid var(--line);border-radius:10px;background:var(--sunk);color:var(--ink);font:inherit}
textarea{resize:vertical;min-height:150px;max-height:420px;line-height:1.5}
input::placeholder,textarea::placeholder{color:var(--muted);opacity:.8}
input:focus-visible,textarea:focus-visible,button:focus-visible,a:focus-visible,.drop:focus-within,.box:focus-visible{outline:3px solid color-mix(in srgb,var(--brand) 45%,transparent);outline-offset:2px}
.meta{display:flex;justify-content:flex-end;margin-top:6px;font-size:.82rem;color:var(--muted)}
.meta.over{color:var(--err);font-weight:600}

.drop{display:flex;flex-direction:column;align-items:center;gap:4px;padding:26px 16px;margin:0;border:1.5px dashed var(--line);border-radius:12px;background:var(--sunk);
  color:var(--muted);text-align:center;cursor:pointer;font-weight:400;font-size:.92rem}
.drop strong{color:var(--ink);font-size:.98rem}
.drop svg{width:26px;height:26px;color:var(--brand);margin-bottom:4px}
.drop:hover,.drop.over{border-color:var(--brand);background:var(--brand-soft)}
.picked{display:flex;align-items:center;gap:12px;padding:12px 14px;border:1px solid var(--line);border-radius:12px;background:var(--sunk);margin-top:10px}
.picked>svg{color:var(--brand)}
.pk-info{display:flex;flex-direction:column;min-width:0;flex:1}
.pk-name{font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.pk-size{color:var(--muted);font-size:.85rem}
.picked.static{margin:0 0 16px}
.icon-btn{appearance:none;border:0;background:transparent;color:var(--muted);width:36px;height:36px;border-radius:8px;cursor:pointer;display:grid;place-items:center}
.icon-btn:hover{background:var(--line);color:var(--ink)}
.icon-btn svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round}

/* buttons */
.btn{appearance:none;display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 20px;border:1px solid transparent;border-radius:10px;
  font:600 .98rem/1.2 var(--font);text-decoration:none;cursor:pointer;min-height:48px}
.btn.block{display:flex;width:100%}
.btn.primary{background:var(--brand);color:var(--brand-ink)}
.btn.primary:hover{filter:brightness(1.08)}
.btn.secondary{background:var(--surface);color:var(--ink);border-color:var(--line)}
.btn.secondary:hover{border-color:var(--brand);color:var(--brand)}
.btn.quiet{background:transparent;color:var(--muted);margin-top:10px}
.btn.quiet:hover{color:var(--ink);background:var(--sunk)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.row{display:flex;flex-wrap:wrap;gap:10px;margin:16px 0 4px}
.row .btn{flex:1 1 140px}

/* alerts, hints */
.alert{margin:0 0 14px;padding:11px 13px;border-radius:10px;background:var(--err-soft);color:var(--err);font-weight:500;font-size:.93rem;border:1px solid color-mix(in srgb,var(--err) 30%,transparent)}
.hint{margin:10px 0 0;color:var(--muted);font-size:.88rem;min-height:1.3em}
.hint.ok{color:var(--ok);font-weight:600}
.center .hint{text-align:center}

/* steps */
.steps{margin:0 0 22px;padding:0;list-style:none;counter-reset:s;display:grid;gap:10px}
.steps li{counter-increment:s;display:flex;gap:12px;align-items:flex-start;color:var(--ink)}
.steps li::before{content:counter(s);flex:none;width:24px;height:24px;border-radius:50%;background:var(--brand-soft);color:var(--brand);font-weight:700;font-size:.82rem;display:grid;place-items:center;margin-top:1px}

/* viewfinder / QR frame: sudut bracket = motif merek */
.viewfinder,.qrframe{position:relative;padding:10px;margin:2px auto 0;max-width:340px}
.viewfinder{background:#000;border-radius:14px;overflow:hidden;min-height:260px}
#reader{width:100%;border-radius:8px;overflow:hidden}
#reader video{border-radius:8px}
.qrframe{padding:18px;background:#fff;border-radius:14px;border:1px solid var(--line)}
.qr svg{display:block;width:100%;height:auto}
.viewfinder i,.qrframe i{position:absolute;width:26px;height:26px;border:3px solid var(--brand);pointer-events:none}
.viewfinder i{border-color:#fff}
.viewfinder i:nth-of-type(1),.qrframe i:nth-of-type(1){top:6px;left:6px;border-right:0;border-bottom:0;border-top-left-radius:8px}
.viewfinder i:nth-of-type(2),.qrframe i:nth-of-type(2){top:6px;right:6px;border-left:0;border-bottom:0;border-top-right-radius:8px}
.viewfinder i:nth-of-type(3),.qrframe i:nth-of-type(3){bottom:6px;left:6px;border-right:0;border-top:0;border-bottom-left-radius:8px}
.viewfinder i:nth-of-type(4),.qrframe i:nth-of-type(4){bottom:6px;right:6px;border-left:0;border-top:0;border-bottom-right-radius:8px}

/* progress */
.bar{height:10px;border-radius:99px;background:var(--sunk);border:1px solid var(--line);overflow:hidden;margin-top:6px}
.bar.slim{height:6px;max-width:340px;margin:14px auto 0}
.bar span{display:block;height:100%;width:0;background:var(--brand);border-radius:99px;transition:width .2s linear}
#sendPct{text-align:right}
#ttlText{text-align:center}

/* states */
.state{width:64px;height:64px;border-radius:50%;margin:6px auto 14px;display:grid;place-items:center}
.state svg{width:32px;height:32px;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.state.ok{background:var(--ok-soft);color:var(--ok)}
.state.warn{background:var(--warn-soft);color:var(--warn)}

/* result */
.host{margin:0 0 10px;font-size:1.05rem;font-weight:600;color:var(--brand);word-break:break-all}
.box{padding:13px 14px;border:1px solid var(--line);border-radius:10px;background:var(--sunk);word-break:break-word}
.box.mono{font-family:var(--mono);font-size:.88rem;line-height:1.5}
.box.prose{white-space:pre-wrap;max-height:300px;overflow:auto;font-size:.97rem}

.foot{margin:18px 6px 0;color:var(--muted);font-size:.82rem;text-align:center}
.noscript{margin:16px;padding:12px;background:var(--err-soft);color:var(--err);border-radius:10px}

@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

/* ---- info batas & keamanan ---- */
.info{max-width:34rem;margin:1rem auto 0;padding:.75rem 1rem;border:1px solid rgba(127,127,127,.3);border-radius:12px;font-size:.92rem;line-height:1.5}
.info summary{cursor:pointer;font-weight:600}
.info h2{font-size:.95rem;margin:1rem 0 .25rem}
.info ul{margin:.25rem 0;padding-left:1.2rem}
.info p{margin:.4rem 0}
.info .mono,.info code{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.85em;word-break:break-word}
.warn-note{color:#8a5a00}