@import url('https://fonts.googleapis.com/css2?family=Silkscreen:wght@400;700&family=Space+Mono:ital,wght@0,400;0,700;1,400&display=swap');

:root {
  --bg: #f0f2f5;
  --panel: #ffffff;
  --panel-hover: #fafafa;
  --border: #d4d7dc;
  --text: #1a1d24;
  --muted: #6b7280;
  --accent: #6366f1;
  --accent-light: #818cf8;
  --accent-warm: #f472b6;
  --accent-mint: #34d399;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.1);
  --pixel-grid-bg: #6b7280;
  --pixel-grid-dark: #1a1a24;
}

[data-theme="dark"] {
  --bg: #0f0f14;
  --panel: #1a1a24;
  --panel-hover: #242432;
  --border: #2a2a3a;
  --text: #e8e6e3;
  --muted: #8b8b9b;
  --accent: #818cf8;
  --accent-light: #a5b4fc;
  --accent-warm: #f472b6;
  --accent-mint: #34d399;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --pixel-grid-bg: #e8e8e8;
  --pixel-grid-dark: #1a1a24;
}

* {
  box-sizing: border-box;
}

.theme-toggle {
  position: fixed;
  top: 16px;
  right: 16px;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--panel);
  cursor: pointer;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  z-index: 1000;
}

.theme-toggle:hover {
  border-color: var(--accent);
  transform: scale(1.05);
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: 'Space Mono', monospace;
  font-size: 14px;
  color: var(--text);
  background: 
    radial-gradient(ellipse at 30% 10%, rgba(99, 102, 241, 0.08) 0%, transparent 40%),
    radial-gradient(ellipse at 70% 90%, rgba(244, 114, 182, 0.06) 0%, transparent 40%),
    var(--bg);
  background-attachment: fixed;
  transition: background-color 0.3s ease;
}

[data-theme="dark"] body {
  background: 
    radial-gradient(ellipse at 30% 10%, rgba(129, 140, 248, 0.1) 0%, transparent 40%),
    radial-gradient(ellipse at 70% 90%, rgba(244, 114, 182, 0.08) 0%, transparent 40%),
    var(--bg);
  overflow-x: visible;
}

.layout {
  margin: 32px auto;
  display: flex;
  gap: 24px;
  justify-content: center;
  max-width: 100%;
  overflow-x: visible;
  animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: var(--shadow-md);
  padding: 28px;
  position: relative;
  overflow: visible;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1), background-color 0.3s ease, border-color 0.3s ease;
}

.panel:hover {
  box-shadow: var(--shadow-lg);
}

.panel__header h1,
.panel__header h2,
.panel__header p {
  margin: 0;
}

.eyebrow {
  font-family: 'Space Mono', monospace;
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--accent);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.eyebrow::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.panel__header h1 {
  font-family: 'Silkscreen', cursive;
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--text);
  letter-spacing: 0.02em;
}

.panel__header h2 {
  font-family: 'Silkscreen', cursive;
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--text);
}

.description {
  margin-top: 12px !important;
  line-height: 1.6;
  max-width: 74ch;
  font-size: 0.85rem;
  color: var(--muted);
}

.controls-row {
  margin-top: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.controls-row .template-selector,
.controls-row .editor-actions {
  margin-top: 0;
}

.template-selector {
  margin-top: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.template-selector label {
  font-weight: 600;
  font-size: 0.8rem;
  color: var(--text);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.template-selector select {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--panel-hover);
  color: var(--text);
  font-family: 'Space Mono', monospace;
  font-size: 0.85rem;
  padding: 10px 14px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.template-selector select:hover {
  border-color: var(--accent-light);
  background: var(--panel);
}

.template-selector select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.editor-actions {
  margin-top: 12px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.editor-actions button {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--panel);
  color: var(--text);
  font-family: 'Space Mono', monospace;
  font-weight: 600: 0.;
  font-size8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 10px 18px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.editor-actions button:hover {
  border-color: var(--accent);
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.08) 0%, rgba(129, 140, 248, 0.08) 100%);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.15);
}

#clear-grid-btn:hover {
  border-color: var(--accent-warm);
  background: linear-gradient(135deg, rgba(244, 114, 182, 0.08) 0%, rgba(244, 114, 182, 0.04) 100%);
  box-shadow: 0 4px 12px rgba(244, 114, 182, 0.15);
}

#export-grid-btn:hover {
  border-color: var(--accent-mint);
  background: linear-gradient(135deg, rgba(52, 211, 153, 0.08) 0%, rgba(52, 211, 153, 0.04) 100%);
  box-shadow: 0 4px 12px rgba(52, 211, 153, 0.15);
}

.editor-zone {
  margin-top: 20px;
  display: grid;
  grid-template-columns: 144px max-content;
  justify-content: start;
  align-items: start;
  gap: 24px;
}

.legend {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  margin: 0;
}

.legend__item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--panel-hover);
  font-size: 0.75rem;
  font-family: 'Space Mono', monospace;
  transition: all 0.2s ease;
  animation: slideUp 0.3s ease-out backwards;
}

.legend__item:nth-child(1) { animation-delay: 0.02s; }
.legend__item:nth-child(2) { animation-delay: 0.04s; }
.legend__item:nth-child(3) { animation-delay: 0.06s; }
.legend__item:nth-child(4) { animation-delay: 0.08s; }
.legend__item:nth-child(5) { animation-delay: 0.1s; }
.legend__item:nth-child(6) { animation-delay: 0.12s; }
.legend__item:nth-child(7) { animation-delay: 0.14s; }
.legend__item:nth-child(8) { animation-delay: 0.16s; }
.legend__item:nth-child(9) { animation-delay: 0.18s; }
.legend__item:nth-child(10) { animation-delay: 0.2s; }

.legend__item:hover {
  border-color: var(--accent-light);
  transform: translateX(4px);
  background: var(--panel);
}

.legend__item--active {
  border-color: var(--accent);
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(129, 140, 248, 0.1) 100%);
  box-shadow: 0 0 0 2px var(--accent);
}

.legend__color {
  width: 24px;
  height: 24px;
  border: 2px solid rgba(0, 0, 0, 0.08);
  border-radius: 6px;
  flex: none;
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
}

.legend__color:hover {
  transform: scale(1.12);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  border-color: transparent;
}

.legend__label {
  color: var(--muted);
  font-weight: 500;
  white-space: nowrap;
}

.editor-wrap {
  width: fit-content;
  max-width: 100%;
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--panel-hover);
  padding: 0;
}

.editor {
  display: grid;
  grid-template-columns: repeat(20, 28px);
  gap: 0;
  width: fit-content;
}

.cell-input {
  width: 28px;
  height: 28px;
  border: 0;
  border-radius: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Space Mono', monospace;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--muted);
  background: var(--panel-hover);
  text-align: center;
  line-height: 1;
  cursor: text;
  user-select: text;
  transition: all 0.15s ease;
}

.cell-input:hover {
  background: #d1d5db;
}

.cell-input--selected {
  background: rgba(99, 102, 241, 0.12);
  box-shadow: inset 0 0 0 2px var(--accent);
}

.cell-input:focus {
  outline: none;
  background: rgba(244, 114, 182, 0.12);
  box-shadow: inset 0 0 0 2px var(--accent-warm);
  color: var(--accent-warm);
}

.panel--preview {
  display: flex;
  flex-direction: column;
  min-height: 580px;
}

.pixel-art {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(20, 16px);
  grid-template-rows: repeat(20, 16px);
  gap: 1px;
  align-self: center;
  padding: 1px;
  border: 1px solid var(--border);
  border-radius: 2px;
  background: var(--pixel-grid-bg);
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.2);
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

.pixel {
  width: 16px;
  height: 16px;
  border-radius: 0;
  transition: all 0.15s ease;
}

.preview-controls {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 12px;
}

.scale-btn {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
  color: var(--text);
  font-family: 'Space Mono', monospace;
  font-size: 0.75rem;
  padding: 8px 14px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.scale-btn:hover {
  border-color: var(--accent);
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.08) 0%, rgba(129, 140, 248, 0.08) 100%);
}

.scale-btn--active {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

#export-image-btn {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-family: 'Space Mono', monospace;
  font-size: 0.75rem;
  padding: 10px 18px;
  cursor: pointer;
  transition: all 0.2s ease;
  margin-top: 12px;
  align-self: center;
}

#export-image-btn:hover {
  background: var(--accent-light);
  border-color: var(--accent);
}

.pixel-art[data-scale="0.2"] {
  transform: scale(0.2);
  transform-origin: center center;
}

.pixel-art[data-scale="0.5"] {
  transform: scale(0.5);
  transform-origin: center center;
}

.pixel-art[data-scale="1"] {
  transform: scale(1);
  transform-origin: center center;
}

.copyright {
  text-align: center;
  margin-top: 36px;
  margin-bottom: 24px;
  font-size: 0.8rem;
  color: var(--muted);
}

.copyright a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
  transition: all 0.2s ease;
  position: relative;
}

.copyright a:hover {
  color: var(--accent-warm);
}

.copyright a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent-warm);
  transition: width 0.3s ease;
}

.copyright a:hover::after {
  width: 100%;
}

@media (max-width: 1100px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .editor-zone {
    grid-template-columns: 1fr;
  }

  .editor-wrap {
    width: 100%;
    overflow: auto;
  }

  .legend {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .controls-row {
    align-items: flex-start;
  }
  
  .layout {
    width: min(100% - 16px, 1160px);
    margin: 16px auto;
    gap: 14px;
    padding: 0 8px;
  }

  .panel {
    padding: 16px;
  }

  .panel__header h1 {
    font-size: 1.4rem;
  }

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

  .editor {
    grid-template-columns: repeat(20, 20px);
  }

  .cell-input {
    width: 20px;
    height: 20px;
    font-size: 0.65rem;
  }

  .pixel-art {
    grid-template-columns: repeat(20, 12px);
    grid-template-rows: repeat(20, 12px);
    gap: 2px;
    padding: 8px;
  }

  .pixel {
    width: 12px;
    height: 12px;
  }
}