:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --text: #1a1f26;
  --muted: #5c6570;
  --accent: #2563eb;
  --accent-contrast: #ffffff;
  --border: #d8dde3;
  --ok: #15803d;
  --warn: #b45309;
  --fail: #b91c1c;
  --radius: 10px;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1319;
    --surface: #171d26;
    --text: #e8ecf1;
    --muted: #9aa4b1;
    --accent: #60a5fa;
    --accent-contrast: #0f1319;
    --border: #2a323d;
    --ok: #4ade80;
    --warn: #fbbf24;
    --fail: #f87171;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
body {
  margin: 0;
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
main { width: min(680px, 100% - 2.5rem); margin: 0 auto; flex: 1; padding: 2.5rem 0 2rem; }

header h1 { margin: 0 0 0.25rem; font-size: 1.7rem; letter-spacing: -0.02em; display: flex; align-items: center; gap: 0.55rem; }
.tagline { margin: 0 0 0.9rem; color: var(--muted); }
.badges {
  list-style: none; padding: 0; margin: 0 0 1.6rem;
  display: flex; flex-wrap: wrap; gap: 0.4rem;
}
.badges li {
  font-size: 0.78rem; padding: 0.22rem 0.6rem; border-radius: 999px;
  border: 1px solid var(--border); background: var(--surface); color: var(--muted);
}
.badges a { color: inherit; }

.controls { display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 0.9rem; }
.controls label { font-weight: 600; }
.controls input, .controls select {
  font: inherit; color: inherit; background: var(--surface);
  border: 1px solid var(--border); border-radius: 8px; padding: 0.45rem 0.6rem;
}
.controls input { width: 6.5rem; }
.controls input:focus-visible, .controls select:focus-visible, #dropzone:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 2px;
}
.hint { color: var(--muted); font-size: 0.82rem; }

#dropzone {
  border: 2px dashed var(--border); border-radius: var(--radius);
  background: var(--surface); cursor: pointer;
  padding: 2.6rem 1rem; text-align: center;
  display: flex; flex-direction: column; gap: 0.25rem;
  transition: border-color 0.15s, background 0.15s;
}
#dropzone span { color: var(--muted); font-size: 0.9rem; }
#dropzone:hover, #dropzone.dragging { border-color: var(--accent); }
#dropzone.dragging { background: color-mix(in srgb, var(--accent) 8%, var(--surface)); }

.btn {
  display: inline-block; font: inherit; font-weight: 600; text-decoration: none;
  background: var(--accent); color: var(--accent-contrast);
  border: 0; border-radius: 8px; padding: 0.45rem 1rem; cursor: pointer;
}
.btn:hover { filter: brightness(1.08); }
#shrink-btn { margin-top: 1rem; margin-right: 0.5rem; }
#download-all { margin-top: 1rem; }

.card .remove {
  background: none; border: 0; cursor: pointer;
  color: var(--muted); font: inherit; line-height: 1; padding: 0 0.2rem;
}
.card .remove:hover { color: var(--fail); }

#results { list-style: none; padding: 0; margin: 1rem 0 0; display: flex; flex-direction: column; gap: 0.7rem; }
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 0.9rem 1.1rem;
}
.card-head { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.card-name { font-weight: 600; overflow-wrap: anywhere; }
.card-sizes { color: var(--muted); white-space: nowrap; }
.card-sizes .arrow { margin: 0 0.35rem; }
.card.done .final { color: var(--ok); font-weight: 600; }
.card-status { margin: 0.35rem 0 0; color: var(--muted); font-size: 0.88rem; }
.card.failed .card-status { color: var(--fail); }
.card-note { margin: 0.35rem 0 0; color: var(--muted); font-size: 0.82rem; }
.card-warn { margin: 0.35rem 0 0; color: var(--warn); font-size: 0.85rem; }
.card-actions { margin-top: 0.6rem; }

.how { margin-top: 2rem; color: var(--muted); font-size: 0.9rem; }
.how summary { cursor: pointer; font-weight: 600; color: var(--text); }
.how ul { padding-left: 1.2rem; }
.how li + li { margin-top: 0.5rem; }

footer {
  border-top: 1px solid var(--border);
  padding: 1rem; text-align: center; color: var(--muted); font-size: 0.85rem;
}
footer a { color: inherit; }