:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --surface-2: #eef1f5;
  --text: #1c2026;
  --text-muted: #5b6472;
  --border: #dfe3ea;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-soft: #e8efff;
  --success: #15803d;
  --success-soft: #e7f6ec;
  --danger: #b91c1c;
  --danger-soft: #fdecec;
  --ring: rgba(37, 99, 235, 0.45);
  --shadow: 0 1px 3px rgba(16, 24, 40, 0.08), 0 4px 16px rgba(16, 24, 40, 0.06);
  --radius: 14px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

[data-theme="dark"] {
  --bg: #0f1216;
  --surface: #181c22;
  --surface-2: #232832;
  --text: #e7eaf0;
  --text-muted: #98a1b0;
  --border: #2c333e;
  --accent: #5b8cff;
  --accent-hover: #7ba2ff;
  --accent-soft: #1d2b47;
  --success: #4ade80;
  --success-soft: #13251a;
  --danger: #f87171;
  --danger-soft: #2b1618;
  --ring: rgba(91, 140, 255, 0.5);
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.4), 0 4px 16px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
  transition: background 0.2s ease, color 0.2s ease;
}

a { color: var(--accent); }
a:focus-visible { outline: 2px solid var(--ring); outline-offset: 2px; border-radius: 4px; }

.container {
  max-width: 860px;
  margin: 0 auto;
  padding: clamp(1rem, 3vw, 2rem) clamp(1rem, 4vw, 2.5rem);
  display: grid;
  gap: 1.25rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: clamp(1rem, 3vw, 1.5rem);
}

.dropzone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: clamp(1.75rem, 6vw, 3rem) 1rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
}
.dropzone:hover, .dropzone.dragover { border-color: var(--accent); background: var(--accent-soft); }
.dropzone:focus-visible { outline: 2px solid var(--ring); outline-offset: 2px; }
.dz-icon { font-size: 2.2rem; display: block; margin-bottom: 0.5rem; }
.dz-title { margin: 0; font-size: 1.05rem; font-weight: 600; }
.dz-hint { margin: 0.35rem 0 0; font-size: 0.85rem; color: var(--text-muted); }
.link { color: var(--accent); text-decoration: underline; }

.settings { margin-top: 1.25rem; }
.field label { display: block; font-weight: 600; font-size: 0.9rem; margin-bottom: 0.45rem; }
.select {
  width: 100%;
  padding: 0.65rem 0.75rem;
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%235b6472' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.8rem center;
  padding-right: 2.2rem;
}
[data-theme="dark"] .select { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%2398a1b0' d='M6 8L0 0h12z'/%3E%3C/svg%3E"); }
.select:focus-visible { outline: 2px solid var(--ring); outline-offset: 2px; }
.field-hint { margin: 0.45rem 0 0; font-size: 0.82rem; color: var(--text-muted); }

.queue { list-style: none; margin: 1.25rem 0 0; padding: 0; display: grid; gap: 0.6rem; }
.queue-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.6rem 0.75rem;
}
.file-meta { flex: 1; min-width: 0; }
.file-name { font-weight: 600; font-size: 0.9rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-size { font-size: 0.78rem; color: var(--text-muted); }
.file-status { font-size: 0.78rem; color: var(--text-muted); white-space: nowrap; }
.file-status.processing { color: var(--accent); }
.file-status.error { color: var(--danger); }
.file-status.done { color: var(--success); }
.progress-track { height: 6px; background: var(--border); border-radius: 999px; overflow: hidden; margin-top: 0.35rem; }
.progress-bar { height: 100%; width: 0%; background: var(--accent); border-radius: 999px; transition: width 0.2s ease; }
.remove-btn {
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 0.25rem 0.4rem;
  border-radius: 8px;
  line-height: 1;
}
.remove-btn:hover { color: var(--danger); background: var(--danger-soft); }
.remove-btn:disabled { opacity: 0.4; cursor: not-allowed; }

.actions { display: flex; gap: 0.75rem; margin-top: 1.25rem; flex-wrap: wrap; }
.btn {
  border: none;
  border-radius: 10px;
  padding: 0.7rem 1.25rem;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.1s ease;
  min-height: 44px;
}
.btn:active { transform: scale(0.98); }
.btn:focus-visible { outline: 2px solid var(--ring); outline-offset: 2px; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--accent-hover); }
.btn-ghost { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-ghost:hover:not(:disabled) { background: var(--surface-2); }
.btn-secondary { background: var(--accent-soft); color: var(--accent); }
.btn-secondary:hover:not(:disabled) { background: var(--accent-hover); color: #fff; }

.hidden { display: none !important; }

.results-head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.results-head h2 { margin: 0; font-size: 1.1rem; }
.results-summary { margin-top: 0.4rem; }

.table-wrap { overflow-x: auto; margin-top: 0.75rem; -webkit-overflow-scrolling: touch; }
table.results { width: 100%; border-collapse: collapse; font-size: 0.9rem; min-width: 540px; }
table.results th, table.results td { text-align: left; padding: 0.65rem 0.6rem; border-bottom: 1px solid var(--border); white-space: nowrap; }
table.results th { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--text-muted); }
table.results td.file-cell { max-width: 220px; overflow: hidden; text-overflow: ellipsis; }
.badge { display: inline-block; padding: 0.15rem 0.5rem; border-radius: 999px; font-size: 0.78rem; font-weight: 600; }
.badge.saved { background: var(--success-soft); color: var(--success); }
.badge.grew { background: var(--surface-2); color: var(--text-muted); }
.badge.error { background: var(--danger-soft); color: var(--danger); }
.row-error { color: var(--danger); }
.dl-single { color: var(--accent); font-weight: 600; text-decoration: none; cursor: pointer; }
.dl-single:hover { text-decoration: underline; }

.cards { display: grid; gap: 0.6rem; margin-top: 0.75rem; }
.card-item { background: var(--surface-2); border: 1px solid var(--border); border-radius: 10px; padding: 0.75rem; display: grid; gap: 0.35rem; }
.card-item .c-name { font-weight: 600; font-size: 0.9rem; word-break: break-word; }
.card-item .c-line { font-size: 0.82rem; color: var(--text-muted); display: flex; justify-content: space-between; gap: 0.5rem; }

.app-footer { text-align: center; font-size: 0.8rem; color: var(--text-muted); padding: 0.5rem 0 1rem; }
.app-footer p { margin: 0; }

.toast {
  position: fixed;
  left: 50%;
  bottom: 1.5rem;
  transform: translate(-50%, 200%);
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.7rem 1.1rem;
  border-radius: 10px;
  box-shadow: var(--shadow);
  font-size: 0.9rem;
  transition: transform 0.25s ease;
  z-index: 50;
  max-width: min(90vw, 480px);
}
.toast.show { transform: translate(-50%, 0); }
.toast.error { border-color: var(--danger); color: var(--danger); }

@media (max-width: 480px) {
  .results-head { align-items: flex-start; }
  .btn { flex: 1; }
}