:root {
  --bg: #0f1115;
  --surface: #171a21;
  --surface-2: #1f232c;
  --border: #2a2f3a;
  --text: #e8eaf0;
  --muted: #8a90a0;
  --accent: #6d8dff;
  --accent-2: #7ef0c0;
  --error: #ff6b6b;
  --radius: 14px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 32px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 16px;
}

.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #0f1115; font-weight: 800; font-size: 13px;
}
.brand-name { font-weight: 700; font-size: 18px; letter-spacing: -0.01em; }

.tabs { display: flex; gap: 4px; background: var(--surface); padding: 4px; border-radius: 10px; }
.tab-btn {
  border: none; background: transparent; color: var(--muted);
  padding: 8px 16px; border-radius: 8px; font-size: 14px; font-weight: 600;
  cursor: pointer; transition: background .15s, color .15s;
}
.tab-btn.active { background: var(--surface-2); color: var(--text); }
.tab-btn:hover { color: var(--text); }

main { max-width: 720px; margin: 0 auto; padding: 40px 24px 80px; }

.panel { display: none; }
.panel.active { display: block; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}

.dropzone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 48px 24px;
  text-align: center;
  cursor: pointer;
  transition: border-color .15s, background .15s;
}
.dropzone:hover, .dropzone.dragover { border-color: var(--accent); background: rgba(109,141,255,0.06); }
.dropzone svg { color: var(--muted); margin-bottom: 12px; }
.dropzone p { margin: 4px 0; }
.muted { color: var(--muted); font-size: 13px; }

.hidden { display: none !important; }

.file-info { margin-top: 20px; }
.file-info-row { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.file-name { font-weight: 600; word-break: break-all; }
.link-btn { background: none; border: none; color: var(--accent); cursor: pointer; font-size: 13px; padding: 0; }

.convert-controls { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.convert-controls label { color: var(--muted); font-size: 14px; }

select, input[type="url"] {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 14px;
}
select { min-width: 140px; }
input[type="url"] { flex: 1; min-width: 0; }

.primary-btn {
  background: var(--accent);
  color: #0f1115;
  border: none;
  padding: 10px 20px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 14px;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: opacity .15s;
}
.primary-btn:hover { opacity: 0.88; }
.primary-btn:disabled { opacity: 0.5; cursor: not-allowed; }

.progress-block { margin-top: 20px; }
.progress-bar { background: var(--surface-2); border-radius: 999px; height: 8px; overflow: hidden; }
.progress-fill { background: linear-gradient(90deg, var(--accent), var(--accent-2)); height: 100%; width: 0%; transition: width .2s; }
.progress-block p { margin-top: 8px; }

.result-block { margin-top: 20px; padding: 16px; background: rgba(126,240,192,0.08); border: 1px solid rgba(126,240,192,0.25); border-radius: 10px; }
.result-block p { margin: 0 0 10px; }

.error-msg { color: var(--error); margin-top: 16px; font-size: 14px; }

.disclaimer {
  font-size: 13px;
  color: var(--muted);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  margin: 0 0 20px;
}

.link-input-row { display: flex; gap: 10px; }

.video-preview { display: flex; gap: 16px; margin-top: 20px; }
.video-preview img { width: 160px; height: 90px; object-fit: cover; border-radius: 8px; background: var(--surface-2); }
.video-meta { flex: 1; min-width: 0; }
.video-title { font-weight: 600; margin: 0 0 4px; }

.info { border-top: 1px solid var(--border); padding: 48px 24px; }
.info-inner { max-width: 720px; margin: 0 auto; }
.info-title { font-size: 22px; margin: 0 0 32px; letter-spacing: -0.01em; }
.info-block { margin-bottom: 36px; }
.info-block h2 { font-size: 17px; margin: 0 0 12px; }
.info-block h3 { font-size: 14px; color: var(--text); margin: 20px 0 6px; }
.info-block p { color: var(--muted); font-size: 14px; line-height: 1.6; margin: 0 0 4px; }
.info-block strong { color: var(--text); }

.chip-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 0;
  padding: 0;
}
.chip-list li {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 13px;
  color: var(--muted);
}

.footer { text-align: center; color: var(--muted); font-size: 12px; padding: 24px; }

@media (max-width: 600px) {
  .topbar { padding: 16px; }
  main { padding: 24px 16px 60px; }
  .card { padding: 20px; }
}

.field-row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 16px; }
.field-row label { color: var(--muted); font-size: 14px; }
.field-row input[type="text"] {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 14px;
  flex: 1;
  min-width: 160px;
}

.pdf-fields { margin-top: 4px; }

.file-list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}
.file-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  font-size: 14px;
  border-bottom: 1px solid var(--border);
  gap: 12px;
}
.file-list li:last-child { border-bottom: none; }
.file-list li span:first-child { word-break: break-all; }

#pdfRunBtn { margin-top: 4px; }

.ocr-preview {
  margin-top: 14px;
  max-height: 260px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-word;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
  font-size: 13px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}