:root {
  --space-0: 0px;
  --space-1: 4px;
  --space-2: 6px;
  --space-3: 8px;
  --space-4: 10px;
  --space-5: 11px;
  --space-6: 12px;
  --space-7: 14px;
  --space-8: 18px;
  --panel-pad: 12px;
  --card-pad: 10px;
  --control-height: 34px;
  --control-radius: 9px;
  --section-gap: 10px;
  --label-gap: 4px;
  --bg: #0f172a;
  --bg-2: #111827;
  --card: rgba(255, 255, 255, 0.06);
  --text: #e5e7eb;
  --muted: #94a3b8;
  --accent: #01cdfe;
  --cell: 4px;
  --gap: 1px;
  --grid-pad-top: 4px;
  --grid-pad-right: 4px;
  --grid-pad-bottom: 4px;
  --grid-pad-left: 4px;
  --grid-cols: 185;
  --grid-rows: 30;
  --radius: 14px;
  --shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  padding: 10px 12px 14px;
  display: grid;
  align-content: center;
  color: var(--text);
  background:
    radial-gradient(circle at top, rgba(1, 205, 254, 0.18), transparent 28%),
    linear-gradient(180deg, #1e293b 0%, #0f172a 100%);
  font-family: "Space Grotesk", "Avenir Next", "Segoe UI", sans-serif;
}

button,
kbd {
  font: inherit;
}

.app {
  width: min(100%, 1180px);
  margin: 0 auto;
  min-height: calc(100vh - 24px);
  display: grid;
  gap: 32px;
}

.app-footer {
  display: flex;
  justify-content: center;
  margin-top: auto;
  padding-bottom: 4px;
  text-align: center;
}

.footer-link {
  font-family: "Space Grotesk", "Avenir Next", "Segoe UI", sans-serif;
  color: var(--muted);
  font-size: 12px;
  text-decoration: underline;
  text-underline-offset: 0.14em;
  transition: color 0.15s ease, text-shadow 0.15s ease;
}

.footer-link:hover,
.footer-link:focus-visible {
  color: var(--accent);
  text-shadow: 0 0 18px rgba(1, 205, 254, 0.22);
}

.footer-link:focus-visible {
  outline: none;
}

.panel {
  background: var(--card);
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
}

.intro-panel,
.control-panel {
  padding: var(--panel-pad);
}

.intro-panel {
  display: grid;
  gap: 1px;
  padding-top: 15px;
  padding-bottom: 10px;
}

.editor-panel {
  padding: var(--panel-pad);
  overflow-x: auto;
  display: grid;
  align-content: center;
  gap: var(--section-gap);
}

.section-label,
.paint-stats,
.status-message,
kbd {
  font-family: "JetBrains Mono", "SFMono-Regular", "SF Mono", Consolas, "Liberation Mono", Menlo, monospace;
}

.section-label {
  margin: 0;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 11px;
}

h1 {
  margin: 0;
  font-size: clamp(22px, 3vw, 30px);
  line-height: 0.95;
}

.intro-copy {
  margin: -1px 0 0;
  max-width: none;
  color: var(--text);
  line-height: 1.06;
  font-size: 12px;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-3);
}

.action-button {
  border: 1px solid rgba(148, 163, 184, 0.28);
  background: rgba(15, 23, 42, 0.72);
  color: var(--text);
  border-radius: 10px;
  padding: 8px 12px;
  cursor: pointer;
  transition: border-color 0.15s ease, transform 0.15s ease, background 0.15s ease;
}

.action-button:hover:not(:disabled),
.action-button:focus-visible:not(:disabled) {
  outline: none;
  transform: translateY(-1px);
  border-color: rgba(1, 205, 254, 0.8);
  background: rgba(15, 23, 42, 0.92);
}

.action-button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.action-button-primary {
  background: rgba(15, 23, 42, 0.72);
  border-color: rgba(148, 163, 184, 0.28);
}

.text-generator {
  display: grid;
  gap: var(--section-gap);
}

.control-layout {
  display: block;
}

.control-card {
  min-width: 0;
  padding: var(--card-pad);
  border: 1px solid rgba(148, 163, 184, 0.16);
  border-radius: 12px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02)),
    rgba(15, 23, 42, 0.56);
}

.control-card .section-label {
  margin-bottom: var(--space-4);
}

.control-card-main {
  display: grid;
  gap: 10px;
}

.control-matrix {
  display: grid;
  grid-template-columns: 188px 144px 116px 126px 152px;
  gap: 10px;
  align-items: end;
  justify-content: center;
  margin-inline: auto;
  max-width: 100%;
}

.control-stack {
  display: grid;
  gap: var(--label-gap);
}

.control-stack-text {
  margin-bottom: 0;
}

.field-block {
  display: grid;
  align-content: start;
  gap: var(--label-gap);
  min-width: 0;
}

.toggle-field {
  align-self: end;
}

.legend-card {
  display: grid;
  gap: 8px;
  justify-items: center;
  text-align: center;
}

.legend {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.control-card .legend-label {
  margin-bottom: 0;
  align-self: center;
}

.text-input {
  width: 100%;
  min-width: 0;
  min-height: var(--control-height);
  border: 1px solid rgba(148, 163, 184, 0.28);
  border-radius: var(--control-radius);
  background: rgba(15, 23, 42, 0.78);
  color: var(--text);
  padding: 8px 10px;
}

.text-input:focus-visible {
  outline: none;
  border-color: rgba(1, 205, 254, 0.8);
  box-shadow: 0 0 0 3px rgba(1, 205, 254, 0.18);
}

.case-select-wrap {
  display: grid;
  gap: var(--label-gap);
  color: var(--text);
  min-width: 0;
}

.case-select-label {
  font-size: 11px;
  color: var(--muted);
}

.case-select {
  width: 100%;
  min-width: 0;
  min-height: var(--control-height);
  border: 1px solid rgba(148, 163, 184, 0.28);
  border-radius: var(--control-radius);
  background: rgba(15, 23, 42, 0.78);
  color: var(--text);
  padding: 7px 28px 7px 9px;
}

.case-select:focus-visible {
  outline: none;
  border-color: rgba(1, 205, 254, 0.8);
  box-shadow: 0 0 0 3px rgba(1, 205, 254, 0.18);
}

.color-input-wrap {
  min-width: 0;
}

.color-input {
  width: 100%;
  height: var(--control-height);
  padding: 3px;
  border: 1px solid rgba(148, 163, 184, 0.28);
  border-radius: var(--control-radius);
  background: rgba(15, 23, 42, 0.78);
  cursor: pointer;
}

.color-input::-webkit-color-swatch-wrapper {
  padding: 0;
}

.color-input::-webkit-color-swatch {
  border: 0;
  border-radius: 7px;
}

.color-input::-moz-color-swatch {
  border: 0;
  border-radius: 7px;
}

.color-input:focus-visible {
  outline: none;
  border-color: rgba(1, 205, 254, 0.8);
  box-shadow: 0 0 0 3px rgba(1, 205, 254, 0.18);
}

.depth-toggle {
  display: grid;
  grid-template-columns: 16px minmax(0, 1fr);
  align-items: center;
  gap: 8px;
  min-height: var(--control-height);
  height: var(--control-height);
  width: 100%;
  min-width: 0;
  padding: 7px 10px;
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: var(--control-radius);
  background: rgba(15, 23, 42, 0.46);
}

.canvas-field {
  align-self: end;
  gap: 0;
}

.canvas-field-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.field-action {
  min-width: 0;
  width: 100%;
}

.export-split {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 34px;
  align-items: stretch;
}

.export-button-main,
.export-button-toggle {
  width: 100%;
}

.export-button-main {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
}

.export-button-toggle {
  padding-inline: 0;
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
  border-left-color: rgba(148, 163, 184, 0.18);
  font-size: 11px;
}

.export-menu {
  position: absolute;
  right: 0;
  top: calc(100% + 6px);
  min-width: 132px;
  display: grid;
  gap: 4px;
  padding: 6px;
  border: 1px solid rgba(148, 163, 184, 0.24);
  border-radius: 10px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02)),
    rgba(15, 23, 42, 0.96);
  box-shadow: 0 18px 32px rgba(0, 0, 0, 0.28);
  z-index: 20;
}

.export-menu[hidden] {
  display: none;
}

.export-menu-item {
  min-height: 30px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: transparent;
  color: var(--text);
  font: inherit;
  font-size: 12px;
  font-weight: 600;
  text-align: left;
  padding: 6px 10px;
  cursor: pointer;
}

.export-menu-item:hover,
.export-menu-item:focus-visible {
  outline: none;
  border-color: rgba(1, 205, 254, 0.36);
  background: rgba(1, 205, 254, 0.08);
}

.depth-toggle-input {
  width: 16px;
  height: 16px;
  margin: 0;
  accent-color: var(--accent);
}

.depth-toggle-copy {
  display: grid;
  gap: 2px;
}

.depth-toggle-title {
  font-size: 12px;
  color: var(--text);
}

.size-input-wrap {
  display: grid;
  gap: var(--label-gap);
}

.size-input {
  width: 100%;
  min-height: var(--control-height);
  border: 1px solid rgba(148, 163, 184, 0.28);
  border-radius: var(--control-radius);
  background: rgba(15, 23, 42, 0.78);
  color: var(--text);
  padding: 7px 9px;
}

.size-input:focus-visible {
  outline: none;
  border-color: rgba(1, 205, 254, 0.8);
  box-shadow: 0 0 0 3px rgba(1, 205, 254, 0.18);
}

.control-footer {
  margin-top: 10px;
}

.control-footer .control-card {
  width: 100%;
  margin-top: 0;
}

.action-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--control-height);
  padding: 8px 10px;
  border-radius: var(--control-radius);
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}

.status-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  align-items: center;
}

.paint-stats,
.status-message {
  margin: 0;
  color: var(--muted);
  font-size: 11px;
}

.status-message {
  min-height: 1em;
  text-align: right;
}

.paint-stats[hidden] {
  display: none;
}

.status-message:empty {
  display: none;
}

.legend-swatches {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
}

.legend-swatch {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 24px;
  padding: 4px 8px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.52);
  border: 1px solid rgba(148, 163, 184, 0.14);
  color: var(--text);
  font-size: 11px;
}

.legend-chip {
  width: var(--cell);
  height: var(--cell);
  border-radius: 3px;
  flex: 0 0 auto;
}

kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.8em;
  padding: 0 0.35em;
  border-radius: 6px;
  border: 1px solid rgba(148, 163, 184, 0.25);
  background: rgba(15, 23, 42, 0.88);
  color: var(--text);
  font-size: 0.9em;
}

.help-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px 16px;
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.35;
  text-align: left;
}

.help-list li {
  min-width: 0;
}

.help-list code {
  font: inherit;
  color: var(--text);
  background: rgba(15, 23, 42, 0.72);
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: 6px;
  padding: 1px 5px;
}

.heatmap-frame {
  position: relative;
  width: max-content;
  max-width: 100%;
  margin: 0 auto;
  padding-right: 18px;
  padding-bottom: 18px;
}

.heatmap-area {
  display: block;
  min-width: max-content;
}

.grid-validation-message {
  min-height: 1.35em;
  margin: 0 auto;
  width: max-content;
  max-width: 100%;
  color: #fca5a5;
  font-size: 12px;
  line-height: 1.35;
  text-align: center;
}

.grid-validation-message:empty {
  display: none;
}

.grid {
  width: max-content;
  display: grid;
  grid-template-columns: repeat(var(--grid-cols), var(--cell));
  grid-template-rows: repeat(var(--grid-rows), var(--cell));
  gap: var(--gap);
  padding: var(--grid-pad-top) var(--grid-pad-right) var(--grid-pad-bottom) var(--grid-pad-left);
  border-radius: 10px;
  background: rgba(15, 23, 42, 0.8);
  user-select: none;
  -webkit-user-select: none;
}

.resize-handle {
  position: absolute;
  right: 0;
  bottom: 0;
  width: 16px;
  height: 16px;
  padding: 0;
  border: 0;
  border-radius: 4px;
  background:
    linear-gradient(135deg, transparent 0 35%, rgba(1, 205, 254, 0.7) 35% 45%, transparent 45% 55%, rgba(1, 205, 254, 0.7) 55% 65%, transparent 65%);
  cursor: nwse-resize;
  opacity: 0.9;
}

.resize-handle:hover,
.resize-handle:focus-visible {
  outline: none;
  opacity: 1;
  filter: drop-shadow(0 0 8px rgba(1, 205, 254, 0.55));
}

.cell {
  width: var(--cell);
  height: var(--cell);
  border: 0;
  padding: 0;
  border-radius: 2px;
  background: #1f2937;
  cursor: crosshair;
  appearance: none;
  transition: box-shadow 0.15s ease, filter 0.15s ease, transform 0.15s ease;
  position: relative;
  touch-action: none;
}

.cell::before {
  content: "";
  position: absolute;
  inset: calc(var(--gap) / -2);
}

.cell:hover,
.cell:focus-visible {
  outline: none;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.95), 0 0 10px rgba(1, 205, 254, 0.72);
  filter: brightness(1.08);
}

.cell.is-drawing {
  transform: scale(0.96);
}

@media (max-width: 1080px) {
  .control-matrix {
    grid-template-columns: repeat(3, minmax(0, 176px));
    justify-content: center;
    margin-inline: auto;
  }

  .help-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 880px) {
  .control-matrix {
    grid-template-columns: repeat(2, minmax(0, 168px));
    gap: 8px;
  }

  .status-row {
    grid-template-columns: 1fr;
  }

  .status-message {
    text-align: left;
  }
}

@media (max-width: 720px) {
  body {
    padding-inline: 10px;
  }

  .intro-panel,
  .control-panel,
  .editor-panel {
    padding: 10px;
  }

  .text-input {
    min-width: 0;
  }

  .control-matrix {
    grid-template-columns: repeat(2, minmax(0, 156px));
    justify-content: center;
  }

  .canvas-field-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .legend {
    flex-direction: column;
    gap: 8px;
  }
}

@media (max-width: 520px) {
  .control-matrix {
    grid-template-columns: minmax(0, 236px);
  }

  .help-list {
    grid-template-columns: 1fr;
  }
}