:root {
  --bg: #12141c;
  --panel: #1a1d27;
  --panel-2: #222636;
  --border: #2d3244;
  --text: #e9e7de;
  --muted: #8b90a5;
  --accent: #ffb454;
  --accent-ink: #241300;
  --font-pixel: 'Silkscreen', 'Courier New', monospace;
  --font-body: system-ui, -apple-system, 'Segoe UI', sans-serif;
}

body[data-mode='paisaje'] {
  --accent: #5fd4b2;
  --accent-ink: #04201a;
}

* {
  box-sizing: border-box;
  margin: 0;
}

[hidden] {
  display: none !important;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 24px;
  border-bottom: 1px solid var(--border);
}

.brand h1 {
  font-family: var(--font-pixel);
  font-size: 22px;
  letter-spacing: 2px;
  color: var(--accent);
  text-transform: uppercase;
  transition: color 200ms;
}

.brand p {
  color: var(--muted);
  font-size: 12px;
  margin-top: 2px;
}

.mode-switch {
  display: flex;
  border: 1px solid var(--border);
  border-radius: 2px;
  overflow: hidden;
}

.mode-switch button {
  font-family: var(--font-pixel);
  font-size: 12px;
  padding: 9px 18px;
  background: var(--panel);
  color: var(--muted);
  border: none;
  cursor: pointer;
}

.mode-switch button.active {
  background: var(--accent);
  color: var(--accent-ink);
}

.layout {
  flex: 1;
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 0;
  min-height: 0;
}

.controls {
  border-right: 1px solid var(--border);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 22px;
  background: var(--panel);
  overflow-y: auto;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.control-group label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 12px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

.control-group label.check {
  flex-direction: row;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

.control-group output {
  float: right;
  font-family: var(--font-pixel);
  color: var(--accent);
  font-size: 11px;
}

select,
input[type='text'] {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 8px 10px;
  font-family: var(--font-body);
  font-size: 14px;
}

input[type='text'] {
  font-family: var(--font-pixel);
  font-size: 12px;
  letter-spacing: 1px;
  width: 100%;
}

input[type='range'] {
  accent-color: var(--accent);
  width: 100%;
}

input[type='checkbox'] {
  accent-color: var(--accent);
  width: 15px;
  height: 15px;
}

.seed-group {
  margin-top: auto;
  border-top: 1px solid var(--border);
  padding-top: 18px;
}

.seed-row {
  display: flex;
  gap: 6px;
}

.seed-row button {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 2px;
  color: var(--accent);
  font-size: 18px;
  width: 40px;
  cursor: pointer;
}

.seed-row button:hover {
  border-color: var(--accent);
}

button.primary {
  font-family: var(--font-pixel);
  font-size: 13px;
  padding: 12px;
  background: var(--accent);
  color: var(--accent-ink);
  border: none;
  border-radius: 2px;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 1px;
}

button.primary:hover {
  filter: brightness(1.1);
}

.stage {
  display: flex;
  flex-direction: column;
  min-height: 0;
  padding: 20px;
  gap: 14px;
}

.canvas-frame {
  flex: 1;
  min-height: 240px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 2px;
  background:
    repeating-conic-gradient(#191c26 0% 25%, #21242f 0% 50%) 0 0 / 20px 20px;
  overflow: hidden;
}

#preview {
  image-rendering: pixelated;
  animation: pop 180ms ease-out;
}

@keyframes pop {
  from { transform: scale(0.96); opacity: 0.4; }
  to { transform: scale(1); opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  #preview { animation: none; }
}

.stage-bar {
  display: flex;
  align-items: center;
  gap: 14px;
}

.dims {
  font-family: var(--font-pixel);
  font-size: 11px;
  color: var(--muted);
  margin-right: auto;
}

label.inline {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

#download {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 9px 16px;
  font-family: var(--font-body);
  font-size: 14px;
  cursor: pointer;
}

#download:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.history {
  display: flex;
  gap: 8px;
  min-height: 62px;
  overflow-x: auto;
  padding-bottom: 4px;
}

.history:empty::after {
  content: 'El historial de generaciones aparecerá aquí';
  color: var(--muted);
  font-size: 12px;
  align-self: center;
}

.history button {
  flex: 0 0 auto;
  width: 56px;
  height: 56px;
  padding: 3px;
  background:
    repeating-conic-gradient(#191c26 0% 25%, #21242f 0% 50%) 0 0 / 10px 10px;
  border: 1px solid var(--border);
  border-radius: 2px;
  cursor: pointer;
}

.history button:hover,
.history button.current {
  border-color: var(--accent);
}

.history canvas {
  width: 100%;
  height: 100%;
  image-rendering: pixelated;
  object-fit: contain;
}

button:focus-visible,
select:focus-visible,
input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

@media (max-width: 760px) {
  .layout {
    grid-template-columns: 1fr;
  }
  .controls {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  .seed-group {
    margin-top: 0;
  }
}