:root {
  --bg: #0b0e14;
  --card: #12161f;
  --border: #232a38;
  --text: #e6e9ef;
  --muted: #8a93a6;
  --accent: #5eead4;
  --accent-2: #7dd3fc;
  --error: #f87171;
  --ok: #4ade80;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(94,234,212,0.07), transparent),
    radial-gradient(900px 500px at -10% 110%, rgba(125,211,252,0.06), transparent),
    var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }

.wrap { max-width: 880px; margin: 0 auto; padding: 48px 20px 32px; }

header h1 {
  font-size: 2.4rem;
  margin: 0;
  letter-spacing: -0.03em;
}
header .tag { color: var(--muted); margin: 8px 0 28px; }
.accent { color: var(--accent); }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  margin-bottom: 20px;
}

#dropzone {
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 44px 24px;
  text-align: center;
  color: var(--muted);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, transform 0.15s;
}
#dropzone:hover, #dropzone:focus-visible,
#dropzone.dragover {
  border-color: var(--accent);
  background: rgba(94,234,212,0.05);
  transform: translateY(-1px);
  outline: none;
}
#dropzone p { margin: 10px 0 0; }
#dropzone strong { color: var(--text); }
#dropzone .hint { font-size: 0.85rem; }

.error { color: var(--error); margin: 12px 0 0; font-size: 0.9rem; }

.row-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.file-label { margin: 0; font-weight: 600; overflow-wrap: anywhere; }

.badge {
  text-transform: uppercase;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(125,211,252,0.12);
  color: var(--accent-2);
  border: 1px solid rgba(125,211,252,0.3);
}
.badge.done { background: rgba(74,222,128,0.1); color: var(--ok); border-color: rgba(74,222,128,0.35); }
.badge.error { background: rgba(248,113,113,0.1); color: var(--error); border-color: rgba(248,113,113,0.35); }

.bar {
  height: 8px;
  background: var(--border);
  border-radius: 999px;
  overflow: hidden;
  margin: 18px 0 8px;
}
#bar-fill {
  height: 100%;
  width: 0%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width 0.25s ease;
}

.pages { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.page-chip {
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
  background: rgba(255,255,255,0.02);
}
.page-chip.done { color: var(--ok); border-color: rgba(74,222,128,0.4); }
.page-chip.failed { color: var(--error); border-color: rgba(248,113,113,0.4); }
.page-chip.converting { color: var(--accent-2); border-color: rgba(125,211,252,0.4); animation: pulse 1.2s infinite; }
@keyframes pulse { 50% { opacity: 0.55; } }

.preview {
  margin: 18px 0 0;
  padding: 16px;
  max-height: 320px;
  overflow: auto;
  background: #0d1117;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 11px;
  line-height: 1.15;
  white-space: pre;
  color: #c9d1d9;
}
.preview.tall { max-height: 520px; }

.actions { display: flex; gap: 10px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 9px 18px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.03);
  color: var(--text);
  font-size: 0.92rem;
  cursor: pointer;
  text-decoration: none;
  transition: filter 0.15s, border-color 0.15s;
}
.btn:hover { filter: brightness(1.2); border-color: var(--accent); }
.btn.primary {
  background: linear-gradient(90deg, rgba(94,234,212,0.18), rgba(125,211,252,0.18));
  border-color: var(--accent);
  color: var(--accent);
  font-weight: 600;
}
.btn.ghost { background: transparent; color: var(--muted); }

footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.8rem;
  margin-top: 30px;
}
footer .mono { font-size: 0.78rem; }