:root {
  --bg: #0f172a;
  --surface: #1e293b;
  --surface-2: #273347;
  --border: #334155;
  --text: #e2e8f0;
  --text-dim: #94a3b8;
  --accent: #0d9488;
  --accent-hover: #14b8a6;
  --error: #ef4444;
  --ok: #22c55e;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(13,148,136,0.18), transparent 60%),
    radial-gradient(1000px 500px at 110% 10%, rgba(20,184,166,0.12), transparent 60%),
    var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.title-bar {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 14px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  background: rgba(0,0,0,0.2);
}

.rodmanoffice-back {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 10px 6px 6px;
  border-radius: 8px;
  text-decoration: none;
  color: var(--text-dim);
  border: 1px solid var(--border);
  font-size: 13px;
}
.rodmanoffice-back:hover { color: var(--text); border-color: var(--accent); }

.app-brand { display: flex; align-items: center; gap: 12px; }
.app-logo {
  width: 32px; height: 32px;
  border-radius: 8px;
  background: var(--accent);
  display: grid; place-items: center;
  font-weight: 800; color: #fff;
}
.app-title { display: flex; flex-direction: column; line-height: 1.1; }
.app-name { font-size: 15px; font-weight: 600; }
.app-subtitle { font-size: 11px; color: var(--text-dim); }

.title-actions { margin-left: auto; }

.stage {
  max-width: 920px;
  margin: 0 auto;
  padding: 36px 24px 80px;
}

.drop-zone {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 56px 24px;
  border: 2px dashed var(--border);
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(30,41,59,0.6), rgba(15,23,42,0.6));
  transition: border-color 120ms ease, background 120ms ease;
  text-align: center;
}
.drop-zone.is-hover {
  border-color: var(--accent);
  background: linear-gradient(180deg, rgba(13,148,136,0.12), rgba(15,23,42,0.6));
}
.drop-icon { color: var(--accent); }
.drop-title { font-size: 18px; font-weight: 600; margin: 0; }
.drop-sub { color: var(--text-dim); margin: 0; font-size: 13px; }
.link-btn {
  background: none; border: none; padding: 0;
  color: var(--accent-hover); cursor: pointer;
  font: inherit; text-decoration: underline;
}
.link-btn:hover { color: #fff; }

.queue-section {
  margin-top: 28px;
  padding: 20px;
  border-radius: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
}
.queue-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}
.queue-title { font-size: 15px; font-weight: 600; margin: 0; }
.zip-toggle {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 13px; color: var(--text-dim);
  margin-left: auto;
  user-select: none;
}
.zip-toggle input { accent-color: var(--accent); }

.primary-btn, .secondary-btn {
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
}
.primary-btn {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.primary-btn:hover:not(:disabled) { background: var(--accent-hover); border-color: var(--accent-hover); }
.primary-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.secondary-btn {
  background: transparent;
  color: var(--text-dim);
  border-color: var(--border);
}
.secondary-btn:hover { color: var(--text); border-color: var(--accent); }

.queue-list {
  list-style: none;
  margin: 0; padding: 0;
  display: flex; flex-direction: column; gap: 8px;
}
.queue-row {
  display: grid;
  grid-template-columns: 1fr 180px auto 110px 32px;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--surface-2);
  border: 1px solid var(--border);
}
.queue-options-toggle {
  background: transparent;
  color: var(--text-dim);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 8px;
  font-size: 11px;
  cursor: pointer;
  white-space: nowrap;
}
.queue-options-toggle:hover { color: var(--text); border-color: var(--accent); }
.queue-options {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 16px;
  padding: 10px 4px 4px;
  margin-top: 4px;
  border-top: 1px dashed var(--border);
}
.queue-options[hidden] { display: none; }
.queue-option {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--text-dim);
}
.queue-option-check {
  cursor: pointer;
}
.queue-option-label { white-space: nowrap; }
.queue-option select,
.queue-option input[type="text"] {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 3px 6px;
  font-size: 11px;
}
.queue-option-range {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.queue-option-range input[type="range"] {
  accent-color: var(--accent);
  width: 110px;
}
.queue-option-value {
  min-width: 36px;
  text-align: right;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}
.queue-option-advanced-toggle {
  background: transparent;
  color: var(--text-dim);
  border: none;
  font-size: 11px;
  cursor: pointer;
  padding: 0 4px;
}
.queue-option-advanced-toggle:hover { color: var(--text); }
.queue-option-advanced {
  flex-basis: 100%;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 16px;
  margin-top: 4px;
  padding: 8px;
  border-radius: 6px;
  background: var(--bg);
}
.queue-option-advanced[hidden] { display: none; }
.queue-name {
  display: flex; flex-direction: column;
  min-width: 0;
}
.queue-filename {
  font-size: 13px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.queue-meta { font-size: 11px; color: var(--text-dim); }
.queue-meta.is-error { color: var(--error); }
.queue-meta.is-done { color: var(--ok); }
.queue-target {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 8px;
  font-size: 12px;
}
.queue-target:disabled { opacity: 0.5; }
.queue-status { font-size: 11px; color: var(--text-dim); text-align: right; }
.queue-status.is-converting {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 4px;
  text-align: left;
}
.queue-status.is-converting .queue-status-text {
  color: var(--text);
  font-size: 11px;
}
.queue-progress {
  position: relative;
  height: 6px;
  border-radius: 3px;
  background: rgba(255,255,255,0.08);
  overflow: hidden;
}
.queue-progress-fill {
  height: 100%;
  background: var(--accent);
  transition: width 120ms linear;
}
.queue-progress[data-indeterminate="true"] .queue-progress-fill {
  width: 40%;
  animation: queue-progress-slide 1.4s linear infinite;
}
@keyframes queue-progress-slide {
  from { transform: translateX(-110%); }
  to   { transform: translateX(260%); }
}
.queue-overall {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  color: var(--text-dim);
  margin-left: auto;
  margin-right: 8px;
  white-space: nowrap;
}
.queue-overall-bar {
  width: 80px;
  height: 4px;
  border-radius: 2px;
  background: rgba(255,255,255,0.08);
  overflow: hidden;
}
.queue-overall-fill {
  height: 100%;
  background: var(--accent);
  transition: width 120ms linear;
}
.queue-overall[hidden] { display: none; }
.queue-retry {
  min-width: 62px;
  padding: 5px 8px;
  border-radius: 6px;
  border: 1px solid rgba(239,68,68,0.45);
  background: rgba(239,68,68,0.08);
  color: var(--text);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
}
.queue-retry:hover {
  border-color: var(--error);
  color: #fff;
}
.queue-remove {
  background: none; border: none;
  color: var(--text-dim); cursor: pointer;
  font-size: 16px; line-height: 1;
}
.queue-remove:hover { color: var(--error); }

.footer-note {
  margin-top: 28px;
  text-align: center;
  font-size: 12px;
  color: var(--text-dim);
}

/* ----- About / Supported formats ----- */
.about {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.about-heading {
  font-size: 20px;
  font-weight: 700;
  margin: 0 0 18px;
}
.about-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.about-col {
  background: linear-gradient(180deg, rgba(30,41,59,0.55), rgba(15,23,42,0.55));
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 20px;
}
.about-col-title {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: var(--accent-hover);
  margin: 0 0 10px;
}
.about-col p {
  font-size: 13px;
  line-height: 1.55;
  color: var(--text-dim);
  margin: 0;
}
.about-col p em {
  font-style: normal;
  color: var(--text);
  background: rgba(255,255,255,0.05);
  padding: 0 4px;
  border-radius: 3px;
}
.about-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.about-list li {
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--text-dim);
  padding-left: 14px;
  position: relative;
}
.about-list li::before {
  content: "›";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent-hover);
}
.about-list strong {
  color: var(--text);
  font-weight: 600;
}
.about-list code,
.about-col p code,
.format-matrix code {
  background: rgba(255,255,255,0.06);
  padding: 1px 5px;
  border-radius: 4px;
  font-size: 11.5px;
}

/* Supported-formats matrix — definition-list of family + direction. */
.format-matrix {
  margin: 0;
  display: grid;
  grid-template-columns: max-content 1fr;
  column-gap: 12px;
  row-gap: 6px;
  align-items: baseline;
}
.format-matrix dt {
  font-size: 11.5px;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 6px;
}
.format-matrix dt .dir {
  font-size: 9.5px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--accent-hover);
  background: rgba(13,148,136,0.18);
  border: 1px solid rgba(13,148,136,0.35);
  padding: 1px 5px;
  border-radius: 999px;
}
.format-matrix dd {
  margin: 0;
  font-size: 12px;
  line-height: 1.5;
  color: var(--text-dim);
}
.format-legend {
  font-size: 11.5px;
  color: var(--text-dim);
  margin: 0 0 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  align-items: baseline;
}
.format-legend strong { color: var(--text); font-weight: 600; }
.format-matrix .fmt-read,
.format-matrix .fmt-write,
.format-matrix .fmt-both,
.format-legend .fmt-read,
.format-legend .fmt-write,
.format-legend .fmt-both { font-weight: 600; }
.fmt-read  { color: #f87171; }   /* red-400  — read only */
.fmt-write { color: #ffffff; }   /* white    — write only */
.fmt-both  { color: #60a5fa; }   /* blue-400 — both */

@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .queue-row { grid-template-columns: minmax(0, 1fr) 116px 66px 28px; }
  .about { margin-top: 32px; padding-top: 24px; }
}