:root {
  --bg: #0a0710;
  --bg-panel: #120d1c;
  --bg-panel-2: #17111f;
  --border: #2a2236;
  --text: #ece7f5;
  --text-muted: #8f86a3;
  --accent: #a855f7;
  --accent-2: #8b5cf6;
  --accent-soft: rgba(168, 85, 247, 0.15);
  --danger: #ef4444;
  --danger-soft: rgba(239, 68, 68, 0.12);
  --success: #34d399;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.45;
}

.app { max-width: 1180px; margin: 0 auto; padding: 24px 20px 60px; }

.app-header { margin-bottom: 20px; }
.brand { display: flex; align-items: center; gap: 14px; }
.brand-mark {
  width: 44px; height: 44px; border-radius: 12px;
  background: linear-gradient(145deg, var(--accent), var(--accent-2));
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 20px; color: #fff;
  box-shadow: 0 0 24px var(--accent-soft);
  flex-shrink: 0;
}
.app-header h1 { margin: 0; font-size: 22px; }
.subtitle { margin: 2px 0 0; color: var(--text-muted); font-size: 14px; }

.banner { border-radius: var(--radius); padding: 12px 16px; margin-bottom: 18px; font-size: 14px; }
.banner-info { background: var(--accent-soft); border: 1px solid rgba(168,85,247,0.35); color: #e9defc; }
.banner-warning { background: rgba(239,68,68,0.12); border: 1px solid rgba(239,68,68,0.35); color: #fca5a5; }

.layout { display: grid; grid-template-columns: 1.6fr 1fr; gap: 20px; align-items: start; }
@media (max-width: 900px) { .layout { grid-template-columns: 1fr; } }

.col { display: flex; flex-direction: column; gap: 20px; }

.card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
}
.card h2 { margin: 0 0 12px; font-size: 15px; letter-spacing: 0.2px; }
.card h3 { margin: 16px 0 8px; font-size: 13px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; }
.muted { color: var(--text-muted); font-weight: 400; font-size: 12px; }
.small-note { margin: 10px 0 0; line-height: 1.5; }

.dropzone {
  border: 1.5px dashed var(--border);
  border-radius: var(--radius);
  padding: 22px;
  text-align: center;
  cursor: pointer;
  transition: border-color .15s, background .15s;
}
.dropzone:hover, .dropzone.dragover { border-color: var(--accent); background: var(--accent-soft); }
.dropzone-small { padding: 14px; }
.dropzone-icon { font-size: 26px; margin-bottom: 6px; }
.dropzone-text { color: var(--text-muted); font-size: 13px; }
.dropzone-file-status { margin-top: 8px; font-size: 13px; color: var(--text); word-break: break-all; }
.dropzone-file-status.error { color: #fca5a5; }
.dropzone-file-status.ok { color: var(--success); }

.template-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
@media (max-width: 560px) { .template-grid { grid-template-columns: 1fr; } }
.template-card {
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 10px;
  cursor: pointer;
  background: var(--bg-panel-2);
  text-align: center;
  transition: border-color .15s, transform .1s;
}
.template-card:hover { border-color: rgba(168,85,247,0.5); }
.template-card.selected { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent), 0 0 18px var(--accent-soft); }
.template-card canvas { width: 100%; aspect-ratio: 1/1; border-radius: 6px; display: block; }
.template-card-name { margin-top: 8px; font-size: 13px; font-weight: 600; }
.template-card-desc { margin-top: 2px; font-size: 11px; color: var(--text-muted); }

.preview-wrap { display: flex; justify-content: center; padding: 8px 0; }
#previewCanvas { width: 100%; max-width: 420px; aspect-ratio: 1/1; border-radius: 10px; background: #000; }

.preview-controls { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; margin-top: 14px; }

.btn {
  border: none; border-radius: 8px; padding: 10px 18px; font-size: 14px; font-weight: 600;
  cursor: pointer; transition: filter .1s, opacity .1s;
}
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-primary { background: linear-gradient(145deg, var(--accent), var(--accent-2)); color: #fff; }
.btn-primary:hover:not(:disabled) { filter: brightness(1.08); }
.btn-secondary { background: var(--bg-panel-2); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover:not(:disabled) { border-color: var(--accent); }

.link-btn { background: none; border: none; color: var(--accent); font-size: 12px; cursor: pointer; padding: 6px 0; text-decoration: underline; }

.slider-label, .toggle-label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--text-muted); }
.toggle-label { flex-direction: row; align-items: center; gap: 8px; color: var(--text); }
.slider-label input[type="range"] { width: 150px; accent-color: var(--accent); }
.toggle-label input[type="checkbox"] { width: 16px; height: 16px; accent-color: var(--accent); }

.advanced-panel summary { cursor: pointer; font-size: 15px; font-weight: 600; list-style: none; }
.advanced-panel summary::-webkit-details-marker { display: none; }
.advanced-panel summary::before { content: "▸ "; color: var(--accent); }
.advanced-panel[open] summary::before { content: "▾ "; }
.advanced-body { margin-top: 12px; display: flex; flex-direction: column; gap: 12px; }
.advanced-body .slider-label input[type="range"] { width: 100%; }

.text-input {
  background: var(--bg-panel-2); border: 1px solid var(--border); border-radius: 6px;
  color: var(--text); padding: 8px 10px; font-size: 13px; width: 100%;
}

.color-control { margin-bottom: 14px; }
.color-control:last-of-type { margin-bottom: 6px; }
.color-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.color-swatch-row { display: flex; gap: 8px; flex-wrap: wrap; }
.color-swatch {
  width: 26px; height: 26px; border-radius: 50%; border: 2px solid var(--border);
  cursor: pointer; padding: 0; transition: border-color .15s, transform .1s;
}
.color-swatch:hover { transform: scale(1.08); }
.color-swatch.selected { border-color: var(--accent); box-shadow: 0 0 0 2px var(--bg-panel), 0 0 0 3px var(--accent); }
.color-picker {
  width: 32px; height: 32px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--bg-panel-2); cursor: pointer; padding: 2px;
}

.field-label { display: block; font-size: 12px; color: var(--text-muted); margin-bottom: 6px; text-transform: uppercase; letter-spacing: 0.5px; }
.radio-row { display: flex; gap: 8px; margin-bottom: 14px; }
.radio-pill {
  border: 1px solid var(--border); border-radius: 20px; padding: 6px 14px; font-size: 13px;
  cursor: pointer; display: flex; align-items: center; gap: 6px; background: var(--bg-panel-2);
}
.radio-pill input { accent-color: var(--accent); }

.note { font-size: 12px; color: var(--text-muted); margin: 4px 0 12px; min-height: 16px; }

.export-buttons { display: flex; gap: 10px; margin-top: 4px; }

.export-progress-wrap { margin-top: 14px; }
.export-progress-track { height: 8px; border-radius: 6px; background: var(--bg-panel-2); overflow: hidden; }
.export-progress-fill { height: 100%; width: 0%; background: linear-gradient(90deg, var(--accent-2), var(--accent)); transition: width .15s; }
.export-progress-fill.is-error { background: var(--danger); }
.export-progress-label { margin-top: 6px; font-size: 12px; color: var(--text-muted); }
.export-progress-label.is-error { color: #fca5a5; }

.export-error-box { margin-top: 14px; background: var(--danger-soft); border: 1px solid rgba(239,68,68,0.35); border-radius: 8px; padding: 10px 12px; }
.export-error-message { font-size: 13px; color: #fca5a5; white-space: pre-wrap; }

.export-done-row { margin-top: 14px; display: flex; flex-direction: column; gap: 8px; align-items: flex-start; }
.export-done-size { font-size: 12px; color: var(--text-muted); }

.segment-controls { border-top: 1px solid var(--border); padding-top: 10px; margin-top: 4px; }
.segment-controls h3 { margin-top: 0; }

.info-list { margin: 0; padding-left: 18px; font-size: 13px; color: var(--text-muted); display: flex; flex-direction: column; gap: 10px; }
.info-list strong { color: var(--text); }