:root {
  --accent: #10b981;
  --accent-hover: #059669;
  --accent-light: rgba(16, 185, 129, 0.1);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', system-ui, sans-serif;
  background: #0a0a0a;
  color: #fff;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.header {
  padding: 24px 32px;
  border-bottom: 1px solid #222;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #111;
}

.header-content h1 {
  font-size: 28px;
  font-weight: 700;
  color: #fff;
  margin: 0 0 4px 0;
  letter-spacing: -0.02em;
}

.header-content p {
  color: #888;
  font-size: 15px;
  font-weight: 500;
}

.accent-picker {
  display: flex;
  gap: 12px;
  align-items: center;
}

.accent-color {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

.accent-color.active {
  border-color: #fff;
  transform: scale(1.15);
  box-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
}

.accent-color:hover {
  transform: scale(1.1);
}

.main-container {
  display: flex;
  flex: 1;
  min-height: 0;
}

.canvas-section {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 32px;
  background: #111;
  min-width: 0;
}

.canvas-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.canvas-info {
  display: flex;
  gap: 16px;
  color: #666;
  font-size: 14px;
  font-weight: 600;
}

#qualityLevel {
  color: var(--accent);
}

canvas {
  border-radius: 20px;
  box-shadow: 
    0 20px 60px rgba(0, 0, 0, 0.8),
    0 0 0 1px rgba(255, 255, 255, 0.05);
  max-width: calc(100vw - 420px - 64px);
  max-height: calc(100vh - 120px - 64px);
  width: auto;
  height: auto;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

canvas:hover {
  transform: translateY(-2px);
  box-shadow: 
    0 25px 70px rgba(0, 0, 0, 0.9),
    0 0 0 1px rgba(255, 255, 255, 0.1);
}

.controls-wrapper {
  width: 420px;
  background: #0f0f0f;
  border-left: 1px solid #222;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  height: 100vh;
}

.controls-header {
  padding: 20px 24px;
  border-bottom: 1px solid #222;
  background: #111;
}

.settings-actions {
  display: flex;
  gap: 12px;
}

.controls-panel {
  flex: 1;
  padding: 24px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 24px;
  scrollbar-width: thin;
  scrollbar-color: #333 #0f0f0f;
}

.controls-panel::-webkit-scrollbar {
  width: 6px;
}

.controls-panel::-webkit-scrollbar-track {
  background: #0f0f0f;
}

.controls-panel::-webkit-scrollbar-thumb {
  background: #333;
  border-radius: 3px;
}

.controls-panel::-webkit-scrollbar-thumb:hover {
  background: #444;
}

.control-group {
  background: linear-gradient(145deg, #1a1a1a, #181818);
  border: 1px solid #333;
  border-radius: 16px;
  padding: 20px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.control-group:hover {
  border-color: #444;
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
}

.control-group.collapsed .control-content {
  display: none;
}

.control-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  margin-bottom: 20px;
  user-select: none;
  padding: 4px 0;
}

.control-group.collapsed .control-header {
  margin-bottom: 0;
}

.control-group h3 {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin: 0;
}

.collapse-icon {
  color: #666;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-size: 14px;
  font-weight: 600;
}

.control-group.collapsed .collapse-icon {
  transform: rotate(-90deg);
}

.control-content {
  display: block;
}

.control-item {
  margin-bottom: 20px;
}

.control-item:last-child {
  margin-bottom: 0;
}

.control-with-reset {
  position: relative;
}

label {
  display: block;
  font-size: 13px;
  color: #ccc;
  margin-bottom: 8px;
  font-weight: 600;
  letter-spacing: 0.3px;
}

.value-display {
  color: var(--accent);
  font-weight: 700;
  font-size: 12px;
}

input[type="color"] {
  width: 100%;
  height: 44px;
  border: 2px solid #333;
  border-radius: 12px;
  background: none;
  cursor: pointer;
  transition: all 0.2s ease;
  padding: 4px;
}

input[type="color"]:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

input[type="color"]:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.range-with-reset {
  display: flex;
  align-items: center;
  gap: 8px;
  position: relative;
}

input[type="range"] {
  flex: 1;
  height: 6px;
  background: linear-gradient(90deg, #333, #2a2a2a);
  border-radius: 3px;
  outline: none;
  -webkit-appearance: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

input[type="range"]::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: none;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.reset-btn {
  width: 28px;
  height: 28px;
  background: #333;
  border: 1px solid #555;
  border-radius: 50%;
  color: #888;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.reset-btn:hover {
  background: var(--accent);
  color: #fff;
  transform: rotate(180deg) scale(1.1);
}

input[type="number"], 
select, 
input[type="file"], 
input[type="text"], 
textarea {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid #333;
  border-radius: 12px;
  background: #222;
  color: #fff;
  font-size: 14px;
  font-family: inherit;
  font-weight: 500;
  transition: all 0.2s ease;
}

input[type="number"]:focus,
select:focus,
input[type="file"]:focus,
input[type="text"]:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
  transform: translateY(-1px);
}

textarea {
  min-height: 80px;
  max-height: 140px;
  resize: vertical;
  line-height: 1.5;
}

input[type="file"] {
  padding: 12px;
  cursor: pointer;
  background: #222;
}

.control-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.format-quality-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 8px;
}

.format-selector, .quality-selector {
  display: flex;
  gap: 6px;
}

.format-btn, .quality-btn {
  flex: 1;
  padding: 10px 12px;
  background: #333;
  border: 2px solid #444;
  border-radius: 10px;
  color: #ccc;
  cursor: pointer;
  font-size: 12px;
  font-weight: 600;
  text-align: center;
  transition: all 0.2s ease;
  letter-spacing: 0.3px;
}

.format-btn:hover, .quality-btn:hover {
  background: #444;
  color: #fff;
  transform: translateY(-1px);
}

.format-btn.active, .quality-btn.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.preset-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 8px;
  margin-top: 12px;
}

.preset-btn {
  padding: 10px 12px;
  background: #333;
  border: 2px solid #444;
  border-radius: 10px;
  color: #ccc;
  cursor: pointer;
  font-size: 11px;
  font-weight: 600;
  transition: all 0.2s ease;
  text-align: center;
  letter-spacing: 0.2px;
}

.preset-btn:hover {
  background: #444;
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.actions-section {
  padding: 24px;
  border-top: 1px solid #222;
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: #111;
}

.action-btn {
  width: 100%;
  padding: 16px;
  border: none;
  border-radius: 12px;
  font-weight: 700;
  cursor: pointer;
  font-size: 15px;
  letter-spacing: 0.3px;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  text-transform: uppercase;
}

.action-btn.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
  color: #fff;
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.3);
}

.action-btn.primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(16, 185, 129, 0.4);
}

.action-btn.secondary {
  background: #374151;
  color: #fff;
  border: 2px solid #4b5563;
}

.action-btn.secondary:hover {
  background: #4b5563;
  transform: translateY(-2px);
}

.action-btn:active {
  transform: translateY(0);
}

.toggle-btn {
  background: #333;
  border: 2px solid #555;
  border-radius: 10px;
  color: #ccc;
  padding: 10px 16px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  transition: all 0.2s ease;
  width: 100%;
  letter-spacing: 0.3px;
}

.toggle-btn:hover {
  background: #444;
  color: #fff;
}

.toggle-btn.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.checkbox-group {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
}

input[type="checkbox"] {
  width: 20px;
  height: 20px;
  accent-color: var(--accent);
  cursor: pointer;
  transform: scale(1.2);
}

.checkbox-group label {
  margin-bottom: 0;
  cursor: pointer;
  user-select: none;
  font-weight: 600;
}

@media (max-width: 1400px) {
  .controls-wrapper {
    width: 380px;
  }
  
  canvas {
    max-width: calc(100vw - 380px - 64px);
  }
}

@media (max-width: 1200px) {
  .controls-wrapper {
    width: 350px;
  }
  
  canvas {
    max-width: calc(100vw - 350px - 64px);
  }
  
  .preset-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 1024px) {
  .main-container {
    flex-direction: column;
  }
  
  .canvas-section {
    height: 60vh;
    padding: 20px;
  }
  
  .controls-wrapper {
    width: 100%;
    height: 40vh;
    border-left: none;
    border-top: 1px solid #222;
  }
  
  canvas {
    max-width: calc(100vw - 40px);
    max-height: calc(60vh - 100px);
  }
  
  .control-row {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  
  .format-quality-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }
}

@media (max-width: 768px) {
  .header {
    flex-direction: column;
    gap: 16px;
    padding: 20px;
  }
  
  .header-content h1 {
    font-size: 24px;
  }
  
  .controls-panel {
    padding: 20px;
    gap: 20px;
  }
  
  .control-group {
    padding: 16px;
  }
  
  .preset-grid {
    grid-template-columns: 1fr;
  }
  
  .actions-section {
    padding: 20px;
  }
}

@media (max-width: 480px) {
  .canvas-section {
    padding: 16px;
  }
  
  .controls-panel {
    padding: 16px;
    gap: 16px;
  }
  
  .control-group {
    padding: 14px;
  }
  
  canvas {
    border-radius: 12px;
  }
  
  .header {
    padding: 16px;
  }
}