:root {
  --bg: #f4f6fb;
  --card: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --border: #e3e6ee;
  --accent: #2563eb;
  --accent-soft: #e8efff;
  --accent-text: #1d4ed8;
  --danger: #dc2626;
  --danger-soft: #fee2e2;
  --success: #16a34a;
  --success-soft: #dcfce7;
  --warn: #d97706;
  --warn-soft: #fef3c7;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.06), 0 8px 24px -12px rgba(16, 24, 40, 0.18);
  --radius: 14px;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1117;
    --card: #161b26;
    --text: #e6e8ee;
    --muted: #9aa3b2;
    --border: #262c3a;
    --accent: #5b9dff;
    --accent-soft: #14233f;
    --accent-text: #8ab8ff;
    --danger: #f87171;
    --danger-soft: #3b1414;
    --success: #4ade80;
    --success-soft: #0f2e1a;
    --warn: #fbbf24;
    --warn-soft: #3a2a08;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 10px 30px -14px rgba(0, 0, 0, 0.7);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
main { width: min(920px, 100% - 32px); margin: 0 auto; flex: 1; display: flex; flex-direction: column; gap: 18px; padding-bottom: 32px; }
h1 { font-size: 1.6rem; margin: 0 0 4px; }
h2 { font-size: 1.05rem; margin: 0; font-weight: 650; }
p { margin: 0; }
a { color: var(--accent-text); }
.hidden { display: none !important; }
.muted, .hint { color: var(--muted); }
.hint { font-size: 0.86rem; }

/* header / footer */
.top { width: min(920px, 100% - 32px); margin: 0 auto; display: flex; align-items: center; justify-content: space-between; padding: 22px 0 18px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.15rem; color: var(--text); text-decoration: none; letter-spacing: -0.01em; }
.brand-icon { width: 30px; height: 30px; color: var(--accent); }
footer { width: min(920px, 100% - 32px); margin: 0 auto; padding: 18px 0 28px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; color: var(--muted); font-size: 0.82rem; border-top: 1px solid var(--border); }

/* buttons */
button, .button {
  font: inherit; cursor: pointer; border-radius: 10px; border: 1px solid var(--border);
  background: var(--card); color: var(--text); padding: 9px 16px; font-weight: 550; text-decoration: none; display: inline-flex; align-items: center; gap: 8px; line-height: 1.2;
  transition: background 0.15s, border-color 0.15s, transform 0.05s;
}
button:hover, .button:hover { border-color: var(--accent); }
button:active { transform: translateY(1px); }
button:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; padding: 12px 26px; font-size: 1.02rem; box-shadow: 0 6px 16px -8px var(--accent); }
button.primary:hover:not(:disabled) { filter: brightness(1.06); }
button.secondary { font-size: 0.9rem; padding: 7px 12px; }
button.link { border: 0; background: none; padding: 0; color: var(--accent-text); font-weight: 500; }
button.link.strong { font-weight: 650; text-decoration: underline; text-underline-offset: 3px; }
button.icon { border: 0; background: none; padding: 6px; color: var(--muted); border-radius: 8px; }
button.icon:hover { background: var(--accent-soft); color: var(--accent-text); }

/* banners */
.banner { background: var(--warn-soft); color: var(--warn); border: 1px solid color-mix(in srgb, var(--warn) 30%, transparent); padding: 10px 14px; border-radius: 10px; font-weight: 550; }
.toast { position: fixed; top: 18px; left: 50%; transform: translateX(-50%); background: var(--danger); color: #fff; padding: 10px 16px; border-radius: 10px; box-shadow: var(--shadow); z-index: 20; max-width: min(560px, 90vw); }
.error { color: var(--danger); font-size: 0.9rem; }

/* drop zone */
.dropzone {
  border: 2px dashed color-mix(in srgb, var(--accent) 45%, var(--border));
  border-radius: 18px; background: var(--card); padding: 54px 24px; text-align: center; cursor: pointer;
  transition: border-color 0.15s, background 0.15s, box-shadow 0.15s; outline: none;
}
.dropzone:hover, .dropzone:focus-visible { border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
.dropzone.dragover { border-color: var(--accent); background: var(--accent-soft); }
.dropzone.compact { padding: 22px 24px; }
.dropzone.compact h1 { font-size: 1.1rem; }
.dropzone.compact .dz-icon { width: 30px; height: 30px; }
.dropzone.compact .hint { display: none; }
.dz-inner { display: flex; flex-direction: column; align-items: center; gap: 6px; max-width: 560px; margin: 0 auto; }
.dz-icon { width: 52px; height: 52px; color: var(--accent); margin-bottom: 6px; }

/* cards */
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 20px; box-shadow: var(--shadow); display: flex; flex-direction: column; gap: 14px; }
.card-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }
.count { color: var(--muted); font-weight: 500; font-size: 0.9rem; margin-left: 4px; }

/* file list */
.file-list, .result-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.file { display: grid; grid-template-columns: 44px 1fr auto; align-items: center; gap: 12px; padding: 8px 10px; border: 1px solid var(--border); border-radius: 12px; }
.file.unsupported { border-color: color-mix(in srgb, var(--danger) 40%, var(--border)); background: color-mix(in srgb, var(--danger-soft) 40%, var(--card)); }
.thumb { width: 44px; height: 44px; border-radius: 8px; object-fit: cover; background: var(--accent-soft); display: flex; align-items: center; justify-content: center; font-size: 0.68rem; font-weight: 700; color: var(--accent-text); text-transform: uppercase; letter-spacing: 0.02em; overflow: hidden; }
img.thumb { object-fit: cover; }
.file-name { font-weight: 550; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-meta { font-size: 0.82rem; color: var(--muted); display: flex; gap: 8px; flex-wrap: wrap; }
.badge { display: inline-block; padding: 1px 7px; border-radius: 999px; font-size: 0.72rem; font-weight: 700; background: var(--accent-soft); color: var(--accent-text); text-transform: uppercase; letter-spacing: 0.03em; }
.badge.danger { background: var(--danger-soft); color: var(--danger); }
.badge.success { background: var(--success-soft); color: var(--success); }

/* targets */
.targets { display: flex; flex-direction: column; gap: 12px; }
.target-group { display: flex; flex-direction: column; gap: 6px; }
.target-group h3 { margin: 0; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); font-weight: 650; }
.pills { display: flex; flex-wrap: wrap; gap: 8px; }
.pill { padding: 7px 12px; border-radius: 999px; font-size: 0.9rem; gap: 6px; }
.pill .ext { font-weight: 700; text-transform: uppercase; letter-spacing: 0.02em; }
.pill .via { font-size: 0.72rem; color: var(--muted); }
.pill.selected { background: var(--accent); border-color: var(--accent); color: #fff; }
.pill.selected .via { color: rgba(255, 255, 255, 0.8); }
.targets .empty { color: var(--muted); }

/* options */
.options { display: flex; flex-wrap: wrap; gap: 10px 22px; align-items: center; }
.option { display: inline-flex; align-items: center; gap: 10px; font-size: 0.92rem; }
.option span { color: var(--muted); }
.option.check span { color: var(--text); }
input[type="range"] { accent-color: var(--accent); width: 160px; }
select { font: inherit; padding: 6px 10px; border-radius: 8px; border: 1px solid var(--border); background: var(--card); color: var(--text); }
input[type="checkbox"] { width: 17px; height: 17px; accent-color: var(--accent); }
.convert-row { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }

/* progress */
.progress { position: relative; height: 10px; border-radius: 999px; background: var(--accent-soft); overflow: hidden; }
.progress .bar { height: 100%; width: 0; background: var(--accent); transition: width 0.15s; }
.progress-label { position: absolute; right: 0; top: 14px; font-size: 0.8rem; color: var(--muted); }

/* results */
.result { display: grid; grid-template-columns: 28px 1fr; gap: 12px; align-items: start; padding: 10px 12px; border: 1px solid var(--border); border-radius: 12px; }
.result.failed { border-color: color-mix(in srgb, var(--danger) 40%, var(--border)); }
.result-status { width: 24px; height: 24px; display: flex; align-items: center; justify-content: center; margin-top: 2px; }
.result-status svg { width: 22px; height: 22px; }
.result-status.done { color: var(--success); }
.result-status.failed { color: var(--danger); }
.spinner { width: 18px; height: 18px; border: 2.5px solid var(--accent-soft); border-top-color: var(--accent); border-radius: 50%; animation: spin 0.8s linear infinite; }
.result-status.queued .spinner { border-top-color: var(--muted); animation-duration: 1.6s; }
@keyframes spin { to { transform: rotate(360deg); } }
.result-body { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.result-title { display: flex; gap: 10px; align-items: baseline; flex-wrap: wrap; }
.outputs { display: flex; flex-wrap: wrap; gap: 8px; }
.outputs a { display: inline-flex; align-items: center; gap: 6px; padding: 5px 10px; border-radius: 8px; background: var(--accent-soft); color: var(--accent-text); text-decoration: none; font-size: 0.88rem; font-weight: 550; max-width: 100%; }
.outputs a span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.outputs a:hover { filter: brightness(0.97); }
.outputs a small { color: var(--muted); font-weight: 500; }
.status-pill { font-size: 0.76rem; font-weight: 650; padding: 2px 9px; border-radius: 999px; background: var(--accent-soft); color: var(--accent-text); text-transform: uppercase; letter-spacing: 0.04em; vertical-align: middle; margin-left: 6px; }
.status-pill.done { background: var(--success-soft); color: var(--success); }
.status-pill.failed, .status-pill.partial { background: var(--danger-soft); color: var(--danger); }

/* dialog */
.dialog { border: 1px solid var(--border); border-radius: 16px; background: var(--card); color: var(--text); padding: 20px 22px; width: min(760px, 92vw); max-height: 85vh; box-shadow: var(--shadow); }
.dialog::backdrop { background: rgba(10, 12, 20, 0.5); }
.dialog-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.formats-cat { margin-top: 14px; }
.formats-cat h3 { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); margin: 0 0 6px; }
table.formats { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
table.formats td, table.formats th { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--border); vertical-align: top; }
table.formats th { font-weight: 600; color: var(--muted); font-size: 0.78rem; }
table.formats tr.expandable { cursor: pointer; }
table.formats tr.expandable:hover td { background: var(--accent-soft); }
table.formats .yes { color: var(--success); font-weight: 700; }
table.formats .no { color: var(--muted); }
.route-list { display: flex; flex-wrap: wrap; gap: 6px; padding: 6px 0 2px; }
.route-list span { font-size: 0.78rem; padding: 2px 8px; border-radius: 999px; background: var(--accent-soft); color: var(--accent-text); font-weight: 600; }

@media (max-width: 600px) {
  .top { padding: 16px 0 12px; }
  .dropzone { padding: 36px 16px; }
  .card { padding: 14px; }
  .file { grid-template-columns: 40px 1fr auto; }
}