:root {
  --main: #111;
  --muted: #9a9a9a;
  --subtle: #e5e5e5;
  --panel: #fff;
  --danger: #c91818;
  --success: #15803d;
}

* {
  box-sizing: border-box;
}

html {
  width: 100%;
  height: 100%;
  overflow: hidden;
}

body {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100vh;
  height: 100dvh;
  margin: 0;
  overflow: hidden;
  overscroll-behavior: none;
  background: #fff;
  color: var(--main);
  font: 13px/1.4 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input,
select {
  font: inherit;
}

.app-shell {
  display: grid;
  grid-template-columns: minmax(360px, 430px) minmax(0, 1fr);
  gap: 18px;
  width: 100%;
  height: 100vh;
  height: 100dvh;
  padding: 18px;
  overflow: hidden;
}

.control-panel {
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  border: 2px solid var(--main);
  background: var(--panel);
}

.control-form {
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  height: 100%;
  min-height: 0;
}

.settings-scroll {
  min-height: 0;
  padding: 18px;
  overflow-y: auto;
  overflow-anchor: none;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
}

.generator-header {
  margin-bottom: 22px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin: -5px -7px 9px;
  padding: 5px 7px;
  color: var(--main);
  font-size: 11px;
  font-weight: 650;
  text-decoration: none;
}

.back-link:hover {
  background: var(--main);
  color: #fff;
}

.back-link:focus-visible {
  outline: 2px solid var(--main);
  outline-offset: 3px;
}

.back-link svg {
  width: 15px;
  height: 15px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.7;
}

.generator-header h1 {
  margin: 0;
  font-size: 20px;
  line-height: 1.2;
}

.generator-header p {
  margin: 8px 0 0;
  color: #777;
  font-size: 12px;
}

fieldset {
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

fieldset:disabled {
  opacity: .42;
}

.control {
  display: block;
  margin: 0 0 16px;
}

.control-label {
  display: block;
  font-size: 12px;
  font-weight: 650;
  letter-spacing: .01em;
}

.control-help {
  display: block;
  margin: 4px 0 8px;
  color: #777;
  font-size: 10px;
  font-weight: 400;
  line-height: 1.4;
}

input[type="number"],
select {
  display: block;
  width: 100%;
  min-height: 34px;
  padding: 7px 9px;
  border: 1px solid var(--main);
  border-radius: 0;
  outline-offset: 2px;
  background: #fff;
  color: var(--main);
}

.toggle-group {
  position: relative;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  border: 1px solid var(--main);
  isolation: isolate;
}

.toggle-group.four-up {
  grid-template-columns: repeat(4, 1fr);
  grid-auto-flow: row;
}

.toggle-group input {
  position: absolute;
  top: 0;
  left: 0;
  width: 1px;
  height: 1px;
  margin: 0;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
  clip-path: inset(50%);
}

.toggle-group label {
  display: flex;
  min-width: 0;
  min-height: 34px;
  align-items: center;
  justify-content: center;
  margin: 0;
  padding: 6px 10px;
  border-right: 1px solid var(--main);
  background: #fff;
  cursor: pointer;
  user-select: none;
}

.toggle-group label:last-child {
  border-right: 0;
}

.toggle-group input:checked + label {
  background: var(--main);
  color: #fff;
}

.toggle-group input:focus-visible + label {
  z-index: 1;
  outline: 2px solid var(--main);
  outline-offset: 2px;
}

.icon-button svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.advanced {
  margin-top: 2px;
  border-top: 1px solid var(--main);
}

.advanced summary {
  padding: 13px 0;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  user-select: none;
}

.advanced-content {
  padding-top: 5px;
}

.disabled-control {
  opacity: .42;
}

.select-shell {
  position: relative;
  display: block;
}

.select-shell::after {
  position: absolute;
  top: 50%;
  right: 11px;
  width: 7px;
  height: 7px;
  border-right: 1.5px solid var(--main);
  border-bottom: 1.5px solid var(--main);
  content: "";
  pointer-events: none;
  transform: translateY(-70%) rotate(45deg);
}

.select-shell select {
  appearance: none;
  padding-right: 32px;
  cursor: pointer;
}

.actions {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr)) 42px;
  gap: 6px;
}

button {
  min-height: 36px;
  padding: 7px 8px;
  border: 1px solid var(--main);
  border-radius: 0;
  background: #fff;
  color: var(--main);
  cursor: pointer;
}

button:hover:enabled,
.primary-action {
  background: var(--main);
  color: #fff;
}

.primary-action:hover:enabled {
  background: #333;
}

button:disabled {
  opacity: .35;
  cursor: default;
}

.icon-button {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 5px;
}

.control-footer {
  padding: 14px 18px 16px;
  border-top: 1px solid var(--main);
  background: #fff;
}

.progress-stack {
  margin-top: 13px;
}

.progress-stack[hidden] {
  display: none;
}

.progress-row {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr);
  gap: 8px;
  align-items: center;
}

.progress-label {
  display: grid;
  gap: 1px;
  width: 112px;
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
  white-space: nowrap;
}

.progress-label strong {
  color: var(--main);
  font-size: 10px;
  font-weight: 700;
}

.progress-label span {
  color: var(--muted);
  font-size: 9px;
}

.progress-track {
  display: block;
  height: 7px;
  overflow: hidden;
  border: 1px solid var(--main);
}

#render-progress-fill {
  display: block;
  width: 0;
  height: 100%;
  background: var(--main);
  transition: width 80ms linear;
}

.status {
  margin-top: 13px;
  font-size: 11px;
  overflow-wrap: anywhere;
}

.logs {
  display: grid;
  gap: 5px;
}

.log-row {
  display: grid;
  grid-template-columns: 14px minmax(0, 1fr);
  gap: 6px;
  align-items: start;
  min-height: 16px;
}

.log-icon {
  display: inline-flex;
  width: 14px;
  height: 14px;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 800;
  line-height: 1;
}

.log-row.success .log-icon {
  color: var(--success);
}

.log-row.failure .log-icon {
  color: var(--danger);
}

.log-row.spinner .log-icon {
  width: 11px;
  height: 11px;
  margin: 2px 1px 0;
  border: 1.5px solid #bbb;
  border-top-color: var(--main);
  border-radius: 50%;
  animation: spin .7s linear infinite;
}

.log-row.detail {
  color: var(--muted);
  font-size: 9px;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .log-row.spinner .log-icon {
    animation-duration: 1.8s;
  }
}

.canvas-stage {
  display: flex;
  min-width: 0;
  min-height: 0;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

canvas {
  display: block;
  width: min(100%, calc(100vh - 36px));
  height: auto;
  max-height: calc(100vh - 36px);
  aspect-ratio: 1;
  border: 2px solid var(--main);
  background: #fff;
}

@media (max-width: 760px) {
  .app-shell {
    grid-template-columns: minmax(280px, 48vw) minmax(0, 1fr);
    gap: 10px;
    padding: 10px;
  }

  .actions {
    grid-template-columns: repeat(2, minmax(0, 1fr)) 42px;
  }

  #save {
    grid-column: 3;
    grid-row: 1 / span 2;
  }
}