style.css

:root {
  --bg: #0b1020;
  --surface: #121a2b;
  --surface-2: #1b2740;
  --text: #e6edf3;
  --muted: #9fb3c8;
  --border: #243453;
  --primary: #4f46e5; /* Indigo-600 */
  --primary-700: #4338ca;
  --secondary: #0ea5e9; /* Sky-500 */
  --shadow: 0 8px 30px rgba(0,0,0,0.25);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, "Helvetica Neue", Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background: radial-gradient(1200px 600px at 20% -10%, rgba(79,70,229,0.18), transparent 60%),
              radial-gradient(1000px 800px at 120% 10%, rgba(14,165,233,0.18), transparent 55%),
              var(--bg);
  color: var(--text);
  line-height: 1.45;
}

.header {
  text-align: center;
  padding: 48px 16px 12px;
}
.header h1 {
  margin: 0;
  font-size: 2.1rem;
  letter-spacing: 0.3px;
}
.subtitle {
  margin: 8px 0 0;
  color: var(--muted);
}

.container {
  width: min(1100px, 92vw);
  margin: 0 auto;
  padding: 20px 0 56px;
  display: grid;
  gap: 16px;
}

.panel {
  background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01));
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(6px);
}

.panel-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}
.panel-header h2 {
  margin: 0;
  font-size: 1.05rem;
}
.count {
  color: var(--muted);
  font-size: 0.9rem;
}

.drop-zone {
  border: 2px dashed var(--border);
  border-radius: 14px;
  padding: 28px;
  text-align: center;
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  transition: border-color .2s, background-color .2s, transform .1s;
  cursor: pointer;
  outline: none;
}
.drop-zone:focus-visible {
  border-color: var(--secondary);
  box-shadow: 0 0 0 3px rgba(14,165,233,0.35);
}
.drop-zone.is-dragover {
  border-color: var(--primary);
  background: rgba(79,70,229,0.08);
  transform: scale(1.01);
}
.drop-zone__content .icon {
  font-size: 42px;
  margin-bottom: 6px;
}
.drop-zone__content .primary {
  font-size: 1.05rem;
  font-weight: 600;
}
.drop-zone__content .secondary {
  color: var(--muted);
  margin: 6px 0;
}
.drop-zone__content .hint {
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.9rem;
}

.controls {
  margin-top: 14px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.input {
  flex: 1 1 280px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  outline: none;
}
.input::placeholder { color: #7d94ad; }

.btn {
  appearance: none;
  border: 1px solid transparent;
  border-radius: 10px;
  padding: 10px 14px;
  cursor: pointer;
  font-weight: 600;
  transition: background-color .15s, transform .04s, border-color .15s, opacity .15s;
  background: var(--surface);
  color: var(--text);
}
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary {
  background: var(--primary);
  border-color: var(--primary-700);
}
.btn-primary:hover { background: var(--primary-700); }
.btn-secondary {
  border-color: var(--border);
  background: var(--surface-2);
}
.btn-secondary:hover { border-color: var(--secondary); }

.status {
  margin-bottom: 8px;
  color: var(--muted);
}
.meta {
  display: flex;
  gap: 12px;
  color: var(--muted);
  font-size: 0.92rem;
  margin-top: 6px;
}

.progress {
  width: 100%;
  height: 10px;
  border-radius: 999px;
  background: #0e1629;
  border: 1px solid var(--border);
  overflow: hidden;
  display: none;
}
.progress__bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  transition: width .2s ease-out;
}

.file-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--border);
}
.file {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 10px;
  align-items: center;
  padding: 12px 8px;
  border-bottom: 1px solid var(--border);
}
.file__name {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}
.file__name .badge {
  font-size: 0.78rem;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px 8px;
}
.file__name .path {
  color: #93a6bd;
  font-size: 0.9rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.file__size {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  padding: 0 10px;
}
.file__actions {
  display: flex;
  gap: 8px;
}

.preview {
  margin-top: 6px;
}
.preview__content {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  overflow: auto;
  max-height: 55vh;
}
.preview__content pre {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 0.92rem;
}
.preview__content img, .preview__content embed, .preview__content iframe {
  width: 100%;
  height: auto;
  border: none;
  border-radius: 8px;
  background: #0c1326;
}

.footer {
  text-align: center;
  color: var(--muted);
  padding: 24px 16px 48px;
}