:root {
  --bg: #0f0f11;
  --bg-elev: #17171b;
  --bg-elev-2: #1d1d22;
  --border: #2a2a31;
  --fg: #ececec;
  --fg-dim: #a3a3ad;
  --muted: #7a7a85;
  --accent: #ffb347;
  --accent-ink: #1a1a1d;
  --danger: #ff6a5a;
  --ok: #7ee787;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 0 rgba(255,255,255,.03), 0 8px 24px rgba(0,0,0,.35);
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font: 15px/1.55 -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(255,179,71,.06), transparent 60%),
    radial-gradient(900px 500px at 100% 0%, rgba(120,160,255,.05), transparent 60%),
    var(--bg);
  color: var(--fg);
  min-height: 100vh;
}

a { color: inherit; }
.muted { color: var(--fg-dim); }
.small { font-size: 12.5px; }
code { font-family: var(--mono); background: var(--bg-elev-2); padding: 1px 6px; border-radius: 4px; border: 1px solid var(--border); font-size: 0.92em; }

.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 28px;
  border-bottom: 1px solid var(--border);
  background: rgba(15,15,17,.7);
  backdrop-filter: saturate(140%) blur(8px);
  position: sticky; top: 0; z-index: 10;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand h1 { font-size: 18px; margin: 0; letter-spacing: .2px; }
.brand .tag { color: var(--muted); font-size: 12px; padding-left: 8px; border-left: 1px solid var(--border); margin-left: 4px; }
.topbar nav { display: flex; gap: 18px; font-size: 13.5px; }
.topbar nav a { text-decoration: none; }
.topbar nav a:hover { color: var(--fg); }

main { max-width: 980px; margin: 0 auto; padding: 40px 24px 80px; }

.hero { text-align: center; margin-bottom: 28px; }
.hero h2 { font-size: 28px; margin: 8px 0 6px; letter-spacing: -0.01em; }
.hero p { margin: 0; }

.dropzone {
  border: 1.5px dashed var(--border);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--bg-elev), var(--bg-elev-2));
  padding: 54px 24px;
  display: flex; align-items: center; justify-content: center;
  text-align: center;
  transition: border-color .15s ease, background .15s ease, transform .1s ease;
  cursor: pointer;
  outline: none;
}
.dropzone:hover, .dropzone:focus-visible { border-color: #3a3a44; }
.dropzone.drag-over {
  border-color: var(--accent);
  background: linear-gradient(180deg, #1c1a15, #211d13);
}
.drop-inner { display: flex; flex-direction: column; align-items: center; gap: 10px; color: var(--fg-dim); }
.drop-inner svg { color: var(--muted); }
.drop-inner p { margin: 0; }
.linkish {
  background: none; border: 0; color: var(--accent); cursor: pointer; font: inherit; padding: 0;
  text-decoration: underline; text-underline-offset: 3px;
}

button {
  font: inherit; cursor: pointer;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--fg);
  padding: 8px 14px;
  transition: background .12s, border-color .12s, transform .05s;
}
button:hover { background: var(--bg-elev-2); }
button:active { transform: translateY(1px); }
button:disabled { opacity: .5; cursor: not-allowed; }
button.primary {
  background: var(--accent); color: var(--accent-ink); border-color: transparent; font-weight: 600;
}
button.primary:hover { background: #ffc166; }
button.ghost { background: transparent; }
button.small { padding: 6px 10px; font-size: 13px; }

select {
  font: inherit; color: var(--fg);
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 7px 10px;
  min-width: 160px;
}

.queue { margin-top: 32px; }
.queue-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.queue-header h3 { margin: 0; font-size: 16px; }
.queue-header > div { display: flex; gap: 8px; }

#queue-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
.qitem {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto auto;
  gap: 10px 16px;
  align-items: center;
  padding: 14px 16px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.qinfo { min-width: 0; }
.qname { font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.qcontrols { display: flex; gap: 8px; align-items: center; }
.qoptions[hidden] { display: none; }
.qoptions {
  grid-column: 1 / -1;
  display: flex; flex-wrap: wrap; gap: 14px 20px;
  padding: 10px 12px;
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}
.qopt { display: flex; align-items: center; gap: 8px; font-size: 12.5px; color: var(--fg-dim); }
.qopt-label { white-space: nowrap; }
.qopt input[type="range"] { width: 120px; accent-color: var(--accent); }
.qopt input[type="number"] { width: 70px; }
.qopt input[type="number"], .qopt select {
  font: inherit; color: var(--fg);
  background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 4px 8px; min-width: 0;
}
.qopt-val { font-family: var(--mono); color: var(--fg); min-width: 38px; }

.drop-note { color: var(--accent); margin-top: 6px !important; }

.qstatus { grid-column: 1 / -1; min-height: 0; }
.qstatus.working { color: var(--fg-dim); }
.qstatus.error { color: var(--danger); }
.qstatus.ok { color: var(--ok); }
.qresult[hidden] { display: none; }
.qresult { grid-column: 1 / -1; display: flex; gap: 10px; flex-wrap: wrap; }
.qresult a {
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--fg);
  font-size: 13px;
}
.qresult a:hover { border-color: var(--accent); color: var(--accent); }

.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }

.supported { margin-top: 56px; }
.supported h3 { margin: 0 0 4px; font-size: 16px; }
.support-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 10px;
  margin-top: 14px;
}
.support-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
}
.support-card .name { font-weight: 600; font-size: 13.5px; margin-bottom: 2px; }
.support-card .pairs { color: var(--fg-dim); font-size: 12.5px; font-family: var(--mono); }
.support-card .heavy { display: inline-block; margin-top: 8px; font-size: 11px; padding: 2px 8px; border-radius: 999px; border: 1px solid var(--border); color: var(--fg-dim); }

footer {
  text-align: center; padding: 24px; border-top: 1px solid var(--border);
  margin-top: 40px;
}

/* lightweight progress bar */
.progress {
  height: 4px; width: 100%;
  background: var(--border); border-radius: 999px; overflow: hidden;
  margin-top: 6px;
}
.progress > span {
  display: block; height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--accent), #ffd08a);
  transition: width .2s ease;
}