:root {
  --bg: #f6f4f0;
  --panel: #ffffff;
  --ink: #1c1a17;
  --muted: #6d675f;
  --line: #e4dfd6;
  --accent: #e8590c;
  --accent-ink: #ffffff;
  --ok: #2b8a3e;
  --warn: #c92a2a;
  --drop: #faf8f5;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #141311; --panel: #1d1b19; --ink: #f1ede7; --muted: #a39d94; --line: #34312d;
    --accent: #ff7a2e; --ok: #69db7c; --warn: #ff8787; --drop: #191816; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #141311; --panel: #1d1b19; --ink: #f1ede7; --muted: #a39d94; --line: #34312d;
  --accent: #ff7a2e; --ok: #69db7c; --warn: #ff8787; --drop: #191816; color-scheme: dark;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 15px/1.5 ui-sans-serif, -apple-system, "SF Pro Text", "Segoe UI", system-ui, sans-serif;
  padding: 28px 16px 48px; max-width: 1240px; margin-inline: auto;
}
header { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; margin-bottom: 24px; flex-wrap: wrap; }
.brand { display: flex; gap: 14px; align-items: flex-start; max-width: 760px; }
.logo { width: 40px; height: 40px; flex: none; margin-top: 1px; }
h1 { font-size: 28px; font-weight: 400; margin: 0; letter-spacing: 0.02em; line-height: 1.3; }
.sub { margin: 4px 0 0; color: var(--muted); }
.local { font-size: 13px; color: var(--muted); border: 1px solid var(--line); border-radius: 999px; padding: 5px 12px; white-space: nowrap; }

main { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 760px) { main { grid-template-columns: 1fr; } }

.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 16px; padding: 16px; display: flex; flex-direction: column; gap: 12px; min-width: 0; }
.panel-head { display: flex; align-items: center; gap: 10px; }
.panel-head h2 { font-size: 16px; margin: 0; }
.step { width: 24px; height: 24px; border-radius: 50%; background: var(--ink); color: var(--panel); font-size: 13px; font-weight: 600; display: grid; place-items: center; }
.hint { margin-left: auto; font-size: 12px; color: var(--muted); }
#right.is-output .step { background: var(--ok); }

.drop {
  position: relative; display: grid; place-items: center; aspect-ratio: 4 / 3; border: 2px dashed var(--line);
  border-radius: 12px; background: var(--drop); cursor: pointer; overflow: hidden; transition: border-color .15s, background .15s;
}
.drop:hover, .drop.over { border-color: var(--accent); }
.drop.filled { border-style: solid; }
.empty { display: grid; gap: 4px; text-align: center; padding: 16px; }
.empty strong { font-size: 16px; }
.empty span { color: var(--muted); font-size: 13px; }
.preview { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; }
.drop.filled .empty { display: none; }

.progress { position: absolute; left: 16px; right: 16px; bottom: 16px; background: color-mix(in srgb, var(--panel) 88%, transparent); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; display: grid; gap: 6px; backdrop-filter: blur(6px); }
.progress .bar { height: 6px; border-radius: 3px; background: var(--line); overflow: hidden; }
.progress .bar::before { content: ""; display: block; height: 100%; width: var(--p, 0%); background: var(--accent); transition: width .2s; }
.progress .label { font-size: 13px; color: var(--muted); font-variant-numeric: tabular-nums; }

.facts { display: grid; grid-template-columns: max-content 1fr; gap: 4px 14px; margin: 0; font-size: 13px; }
.facts:empty { display: none; }
.facts dt { color: var(--muted); }
.facts dd { margin: 0; overflow-wrap: anywhere; }
.tag { display: inline-block; font-size: 12px; font-weight: 600; padding: 1px 8px; border-radius: 999px; border: 1px solid currentColor; }
.tag.ok { color: var(--ok); }
.tag.bad { color: var(--warn); }
.muted { color: var(--muted); }

.actions { display: flex; gap: 10px; flex-wrap: wrap; }
.btn { appearance: none; border: 1px solid var(--accent); background: var(--accent); color: var(--accent-ink); font: inherit; font-weight: 600; padding: 9px 18px; border-radius: 10px; cursor: pointer; text-decoration: none; }
.btn.ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn.small { padding: 4px 10px; font-size: 13px; }
.btn:focus-visible, .drop:focus-within { outline: 2px solid var(--accent); outline-offset: 2px; }

.go { display: flex; flex-direction: column; align-items: center; gap: 8px; margin: 22px 0 4px; }
.go-buttons { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; }
.btn.dl { background: var(--ok); border-color: var(--ok); color: var(--panel); }
.btn.big { font-size: 18px; padding: 14px 56px; border-radius: 12px; }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.go-hint { color: var(--muted); font-size: 14px; }

.options { margin-top: 18px; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 12px 16px; }
.options summary { cursor: pointer; font-weight: 600; }
.opt-row { display: flex; align-items: center; gap: 12px; margin-top: 12px; flex-wrap: wrap; }
.opt-row label { min-width: 120px; }
.opt-row input[type=range] { flex: 1; min-width: 160px; accent-color: var(--accent); }
select { font: inherit; padding: 4px 8px; border-radius: 8px; border: 1px solid var(--line); background: var(--panel); color: var(--ink); }
.note { color: var(--muted); font-size: 13px; margin: 12px 0 0; }
.error { color: var(--warn); background: var(--panel); border: 1px solid var(--warn); border-radius: 10px; padding: 10px 14px; margin-top: 16px; }