:root {
  color-scheme: light dark;
  --bg: #0f172a;
  --panel: #111827;
  --panel-soft: #1f2937;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --border: #374151;
  --danger: #ef4444;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Segoe UI, Arial, sans-serif;
  background: linear-gradient(145deg, #020617, #111827 40%, #0f172a);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: 24px;
}

.app {
  width: min(1100px, 100%);
  background: rgba(17, 24, 39, 0.92);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

.toolbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
}

.lang-switcher {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 2px;
}

.lang-switcher label {
  color: var(--muted);
  font-size: 0.9rem;
}

.lang-switcher select {
  background: var(--panel-soft);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
}

h1 {
  margin-top: 0;
  margin-bottom: 8px;
  font-size: 1.5rem;
}

.subtitle {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 0.95rem;
}

.dropzone {
  border: 2px dashed #4b5563;
  background: rgba(31, 41, 55, 0.65);
  border-radius: 12px;
  padding: 28px;
  text-align: center;
  transition: 0.2s ease;
  cursor: pointer;
  margin-bottom: 14px;
}

.dropzone.drag-over {
  border-color: var(--accent);
  background: rgba(30, 64, 175, 0.2);
}

.dropzone p {
  margin: 0;
  color: #d1d5db;
}

.controls {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

button {
  border: 0;
  border-radius: 8px;
  padding: 10px 14px;
  font-weight: 600;
  cursor: pointer;
  transition: 0.2s ease;
}

#browseBtn {
  background: var(--panel-soft);
  color: var(--text);
  border: 1px solid var(--border);
}

#exportBtn {
  background: var(--accent);
  color: white;
}

#exportBtn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

#browseBtn:hover {
  background: #374151;
}

#exportBtn:hover:not(:disabled) {
  background: var(--accent-hover);
}

.error {
  color: var(--danger);
  min-height: 20px;
  margin-bottom: 10px;
}

.preview {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: rgba(2, 6, 23, 0.6);
  padding: 14px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
  margin-bottom: 12px;
}

.card {
  background: rgba(31, 41, 55, 0.6);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px;
  min-height: 110px;
}

.card h3 {
  margin: 0 0 6px;
  font-size: 0.9rem;
  color: #93c5fd;
  font-weight: 700;
}

.kv {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 6px;
  font-size: 0.9rem;
  margin-top: 2px;
}

.kv .label {
  color: #9ca3af;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 8px;
  font-size: 0.9rem;
}

th, td {
  border-bottom: 1px solid #334155;
  text-align: left;
  padding: 8px 6px;
  vertical-align: top;
}

th {
  color: #93c5fd;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.muted {
  color: var(--muted);
  font-size: 0.85rem;
}

#fileInput {
  display: none;
}