html, body, main {
  margin: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #080b17;
  color: #dcefff;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

#machine-layers {
  position: fixed;
  inset: 0;
  overflow: hidden;
}

#machine-layers canvas {
  position: absolute;
  inset: 0;
  display: block;
  width: 100vw;
  height: 100vh;
}

#static-machine {
  pointer-events: none;
}

#dynamic-machine {
  touch-action: none;
  cursor: grab;
}

#dynamic-machine:active {
  cursor: grabbing;
}

#renderer-controls {
  position: fixed;
  z-index: 3;
  top: 12px;
  right: 12px;
  padding: 7px 9px;
  border: 1px solid rgba(70,55,31,.22);
  border-radius: 11px;
  background: rgba(255,248,229,.9);
  color: #302c26;
  box-shadow: 0 8px 28px rgba(70,48,20,.12);
}
#renderer-controls label { display: flex; align-items: center; gap: 8px; font: 700 11px system-ui; }
#renderer-select { border: 1px solid rgba(70,55,31,.25); border-radius: 7px; padding: 5px 7px; background: #fffaf0; color: #302c26; font: 12px system-ui; }

#view-controls {
  position: fixed;
  z-index: 3;
  right: 12px;
  bottom: 12px;
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 5px;
  border: 1px solid rgba(70, 55, 31, .22);
  border-radius: 14px;
  background: rgba(255, 248, 229, .88);
  box-shadow: 0 8px 28px rgba(70, 48, 20, .16);
  backdrop-filter: blur(8px);
}

#view-controls button,
#view-controls a {
  min-width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 10px;
  padding: 0 9px;
  background: transparent;
  color: #302c26;
  font: 700 15px/1 system-ui, sans-serif;
  text-decoration: none;
  cursor: pointer;
}

#view-controls button:hover,
#view-controls a:hover { background: rgba(38, 75, 155, .11); }

#performance-stats {
  position: fixed;
  z-index: 3;
  left: 12px;
  bottom: 12px;
  min-width: min(310px, calc(100vw - 24px));
  padding: 11px 13px;
  border: 1px solid rgba(255,255,255,.13);
  border-radius: 11px;
  background: rgba(30, 25, 18, .88);
  box-shadow: 0 8px 30px rgba(0,0,0,.22);
  color: #fff8e8;
  font: 11px/1.35 ui-monospace, monospace;
  pointer-events: none;
}

#performance-stats strong,
#performance-stats span { display: block; }
#performance-stats strong { color: #b9e3ff; font-size: 15px; }
#performance-stats b { color: #fff; font-weight: 700; }
#performance-stats hr {
  height: 1px;
  margin: 6px 0;
  border: 0;
  background: rgba(255,255,255,.13);
}

.copy-performance-report {
  position: fixed;
  z-index: 4;
  left: 12px;
  bottom: 235px;
  border: 1px solid rgba(255,255,255,.22);
  border-radius: 8px;
  padding: 7px 11px;
  background: rgba(30,25,18,.88);
  color: #b9e3ff;
  font: 700 11px/1.2 ui-monospace, monospace;
  cursor: pointer;
}
.copy-performance-report:hover { background: rgba(45,38,27,.96); }

#loading {
  position: fixed;
  inset: 0;
  display: grid;
  place-content: center;
  gap: 0.5rem;
  padding: 1rem;
  box-sizing: border-box;
  background: radial-gradient(circle at center, rgba(21, 54, 91, 0.96), rgba(8, 11, 23, 0.98));
  text-align: center;
  transition: opacity 250ms ease;
  overflow: auto;
  -webkit-overflow-scrolling: touch;
}

#loading.hidden {
  opacity: 0;
  pointer-events: none;
}

#loading h1 {
  margin: 0;
  font-size: clamp(2rem, 6vw, 5rem);
  letter-spacing: -0.05em;
}

#loading p {
  margin: 0;
  opacity: 0.8;
}

#loading.error {
  display: block;
  text-align: left;
  place-content: unset;
}

.error-card {
  width: min(100%, 980px);
  margin: 0 auto;
  padding: clamp(1rem, 4vw, 2rem);
  border: 1px solid rgba(255, 180, 180, 0.35);
  border-radius: 16px;
  background: rgba(8, 11, 23, 0.92);
  box-shadow: 0 20px 80px rgba(0, 0, 0, 0.45);
  box-sizing: border-box;
}

.error-card h1 {
  color: #ffd2d2;
  font-size: clamp(1.4rem, 7vw, 2.8rem);
  letter-spacing: -0.04em;
  line-height: 1.05;
  margin-bottom: 0.75rem;
}

.error-summary {
  color: #ffb4b4;
  font-weight: 650;
  overflow-wrap: anywhere;
  margin-bottom: 1rem !important;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0;
}

.error-actions button {
  appearance: none;
  border: 1px solid rgba(220, 239, 255, 0.25);
  border-radius: 999px;
  background: rgba(79, 195, 255, 0.12);
  color: #dcefff;
  padding: 0.55rem 0.9rem;
  font: inherit;
}

.error-card details {
  margin-top: 0.75rem;
  border: 1px solid rgba(220, 239, 255, 0.14);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.035);
  overflow: hidden;
}

.error-card summary {
  cursor: pointer;
  padding: 0.75rem 0.9rem;
  font-weight: 700;
}

.error-card pre {
  margin: 0;
  padding: 0.9rem;
  max-height: min(45vh, 420px);
  overflow: auto;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  background: rgba(0, 0, 0, 0.28);
  color: #e7f5ff;
  font: 12px/1.45 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.debug-page #debug-toolbar {
  position: fixed;
  z-index: 4;
  top: 0;
  left: 0;
  right: 0;
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.65rem 0.9rem;
  box-sizing: border-box;
  background: linear-gradient(180deg, rgba(8, 11, 23, 0.96), rgba(8, 11, 23, 0.72));
  border-bottom: 1px solid rgba(220, 239, 255, 0.12);
  backdrop-filter: blur(10px);
}

.debug-page #debug-toolbar h1 {
  margin: 0;
  font-size: 1rem;
  letter-spacing: -0.02em;
}

.debug-page #debug-toolbar p,
.debug-page #debug-toolbar a {
  margin: 0;
  color: rgba(220, 239, 255, 0.72);
  font-size: 0.78rem;
}

.debug-page #debug-toolbar a {
  text-decoration: none;
}

.debug-page #debug-toolbar label {
  display: grid;
  gap: 0.25rem;
  min-width: min(52vw, 340px);
  font-size: 0.72rem;
  color: rgba(220, 239, 255, 0.72);
}

.debug-page #tile-select {
  width: 100%;
  border: 1px solid rgba(220, 239, 255, 0.22);
  border-radius: 10px;
  background: #111827;
  color: #e7f5ff;
  padding: 0.45rem 0.55rem;
  font: inherit;
  font-size: 0.85rem;
}

.debug-page canvas {
  display: block;
  width: 100vw;
  height: 100vh;
  touch-action: none;
  cursor: crosshair;
}

@media (max-width: 520px) {
  .debug-page #debug-toolbar {
    align-items: stretch;
    flex-direction: column;
  }

  .debug-page #debug-toolbar label {
    width: 100%;
    min-width: 0;
  }
}

.debug-page .validation-report {
  display: inline-block;
  margin-top: 0.25rem !important;
  padding: 0.18rem 0.45rem;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.74rem !important;
  color: rgba(220, 239, 255, 0.82) !important;
  background: rgba(220, 239, 255, 0.10);
}

.debug-page .validation-report.ok {
  color: #bbf7d0 !important;
  background: rgba(34, 197, 94, 0.18);
  border: 1px solid rgba(34, 197, 94, 0.35);
}

.debug-page .validation-report.fail {
  color: #fecaca !important;
  background: rgba(239, 68, 68, 0.18);
  border: 1px solid rgba(239, 68, 68, 0.35);
}

/* Sketch-paper visual theme */
html, body, main {
  background: #f6edd8;
  color: #312e27;
}

#loading {
  background: radial-gradient(circle at center, rgba(250, 244, 226, 0.97), rgba(236, 222, 190, 0.98));
  color: #312e27;
}

#loading h1 {
  font-family: "Comic Sans MS", "Marker Felt", system-ui, sans-serif;
  color: #2f2b24;
}

#loading p {
  color: rgba(49, 46, 39, 0.72);
}

.debug-page #debug-toolbar {
  background: linear-gradient(180deg, rgba(246, 237, 216, 0.96), rgba(246, 237, 216, 0.78));
  border-bottom-color: rgba(91, 78, 52, 0.20);
}

.debug-page #debug-toolbar h1,
.debug-page #debug-toolbar p,
.debug-page #debug-toolbar a,
.debug-page #debug-toolbar label {
  color: rgba(49, 46, 39, 0.78);
}

.debug-page #tile-select {
  background: #fff8e8;
  color: #312e27;
  border-color: rgba(91, 78, 52, 0.28);
}