:root {
  --bg-color: #0a0a0f;
  --bg-gradient: linear-gradient(135deg, #0a0a0f 0%, #1a1a2e 100%);
  --surface-color: #1e1e2e;
  --surface-gradient: linear-gradient(145deg, #2a2a3e 0%, #1f1f2e 100%);
  --primary-color: #bb86fc;
  --primary-gradient: linear-gradient(135deg, #bb86fc 0%, #a370f7 100%);
  --secondary-color: #03dac6;
  --accent-gradient: linear-gradient(135deg, #bb86fc 0%, #03dac6 100%);
  --text-primary: #ffffff;
  --text-secondary: #b0b0b0;
  --error-color: #cf6679;
  --border-radius: 16px;
  --input-bg: #2c2c3e;
  --input-border: #3e3e52;
  --glow-primary: rgba(187, 134, 252, 0.4);
  --glow-secondary: rgba(3, 218, 198, 0.3);
}

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

body {
  font-family: "Inter", sans-serif;
  background: var(--bg-gradient);
  color: var(--text-primary);
  line-height: 1.6;
  height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 20px;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
}

/* Back Button */
.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  margin-bottom: 20px;
  background: rgba(187, 134, 252, 0.1);
  border: 1px solid rgba(187, 134, 252, 0.3);
  border-radius: 50px;
  color: var(--primary-color);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.back-btn:hover {
  background: rgba(187, 134, 252, 0.2);
  border-color: var(--primary-color);
  transform: translateX(-5px);
  box-shadow: 0 0 20px var(--glow-primary);
}

/* Header */
header {
  margin-bottom: 2rem;
  text-align: center;
}

header h1 {
  font-weight: 700;
  font-size: 2.5rem;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
  letter-spacing: 0.5px;
}

header p {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

.main-content {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 25px;
  flex: 1;
  min-height: 0;
}

/* Controls Panel */
.controls-panel {
  background: var(--surface-gradient);
  padding: 25px;
  border-radius: var(--border-radius);
  display: flex;
  flex-direction: column;
  gap: 20px;
  overflow-y: auto;
  max-height: 100%;
  box-shadow: 
    0 10px 40px rgba(0, 0, 0, 0.5),
    0 0 1px rgba(187, 134, 252, 0.2);
  border: 1px solid rgba(187, 134, 252, 0.1);
}

/* Upload Section */
.upload-section {
  border: 2px dashed rgba(187, 134, 252, 0.3);
  border-radius: var(--border-radius);
  padding: 40px 20px;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
  background: rgba(187, 134, 252, 0.03);
  position: relative;
  overflow: hidden;
}

.upload-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at center, rgba(187, 134, 252, 0.1) 0%, transparent 70%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.upload-section:hover::before,
.upload-section.dragover::before {
  opacity: 1;
}

.upload-section:hover,
.upload-section.dragover {
  border-color: var(--primary-color);
  background: rgba(187, 134, 252, 0.1);
  box-shadow: 0 0 30px var(--glow-primary);
}

.upload-section i {
  font-size: 2.5rem;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 10px;
  display: block;
}

/* Settings */
.settings-group h2 {
  font-size: 1.2rem;
  margin-bottom: 18px;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  border-bottom: 1px solid rgba(187, 134, 252, 0.2);
  padding-bottom: 10px;
  font-weight: 600;
}

.setting-item {
  margin-bottom: 18px;
}

.setting-item.full-width {
  grid-column: 1 / -1;
}

.setting-item label {
  display: block;
  margin-bottom: 8px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 500;
}

.tooltip-icon {
  color: var(--secondary-color);
  cursor: help;
  margin-left: 8px;
  font-size: 0.9em;
  transition: all 0.2s;
}

.tooltip-icon:hover {
  color: var(--primary-color);
  transform: scale(1.1);
}

.input-wrapper {
  display: flex;
  align-items: center;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: 8px;
  overflow: hidden;
  transition: all 0.3s ease;
}

.input-wrapper:focus-within {
  border-color: var(--primary-color);
  box-shadow: 0 0 15px var(--glow-primary);
}

.input-wrapper input {
  background: transparent;
  border: none;
  color: var(--text-primary);
  padding: 10px 14px;
  width: 100%;
  font-family: inherit;
  font-size: 0.95rem;
}

.input-wrapper input:focus {
  outline: none;
}

.input-wrapper span {
  padding: 0 14px;
  color: var(--text-secondary);
  font-size: 0.85rem;
  background: rgba(187, 134, 252, 0.1);
  height: 100%;
  display: flex;
  align-items: center;
  font-weight: 600;
}

select {
  width: 100%;
  padding: 10px 14px;
  background: var(--input-bg);
  color: var(--text-primary);
  border: 1px solid var(--input-border);
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.3s ease;
}

select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 15px var(--glow-primary);
}

textarea {
  width: 100%;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: 8px;
  color: var(--text-primary);
  padding: 12px;
  font-family: "Consolas", monospace;
  font-size: 0.9rem;
  resize: vertical;
  transition: all 0.3s ease;
  min-height: 80px;
}

textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 15px var(--glow-primary);
}

/* Advanced Settings */
.advanced-settings summary {
  cursor: pointer;
  color: var(--primary-color);
  font-weight: 600;
  margin-bottom: 15px;
  user-select: none;
  display: flex;
  align-items: center;
  transition: all 0.2s;
}

.advanced-settings summary:hover {
  color: var(--secondary-color);
}

/* Buttons */
.actions {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

button {
  padding: 14px;
  border: none;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  font-family: inherit;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  position: relative;
  overflow: hidden;
}

button::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

button:active::before {
  width: 300px;
  height: 300px;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.primary-btn {
  background: var(--primary-gradient);
  color: #000;
  box-shadow: 0 6px 20px var(--glow-primary);
  font-weight: 700;
}

.primary-btn:hover:not(:disabled) {
  background: linear-gradient(135deg, #a370f7 0%, #bb86fc 100%);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--glow-primary);
}

.secondary-btn {
  background: transparent;
  border: 2px solid var(--primary-color);
  color: var(--primary-color);
}

.secondary-btn:hover:not(:disabled) {
  background: rgba(187, 134, 252, 0.2);
  border-color: var(--secondary-color);
  color: var(--secondary-color);
  box-shadow: 0 0 20px var(--glow-primary);
}

/* Preview Panel */
.preview-panel {
  background: var(--surface-gradient);
  border-radius: var(--border-radius);
  padding: 25px;
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: 
    0 10px 40px rgba(0, 0, 0, 0.5),
    0 0 1px rgba(187, 134, 252, 0.2);
  border: 1px solid rgba(187, 134, 252, 0.1);
}

.canvas-container {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #000;
  border-radius: 12px;
  overflow: hidden;
  position: relative;
  border: 2px solid rgba(187, 134, 252, 0.2);
  box-shadow: inset 0 0 30px rgba(0, 0, 0, 0.8);
}

#placeholder-text {
  position: absolute;
  color: var(--text-secondary);
  pointer-events: none;
  font-size: 1.2rem;
  opacity: 0.5;
}

canvas {
  max-width: 100%;
  max-height: 100%;
}

.stats {
  display: flex;
  gap: 25px;
  margin-top: 20px;
  justify-content: center;
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.stats p {
  display: flex;
  align-items: center;
}

.dot {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  margin-right: 8px;
  box-shadow: 0 0 10px currentColor;
}

.dot.write {
  background-color: var(--secondary-color);
  color: var(--secondary-color);
}

.dot.travel {
  background-color: var(--error-color);
  color: var(--error-color);
}

/* Custom Tooltip */
.tooltip {
  position: absolute;
  background: linear-gradient(135deg, #2a2a3e 0%, #1f1f2e 100%);
  color: #fff;
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 0.85rem;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.7);
  z-index: 1000;
  max-width: 280px;
  border: 1px solid rgba(187, 134, 252, 0.3);
  backdrop-filter: blur(10px);
}

/* Scrollbar Styling */
.controls-panel::-webkit-scrollbar {
  width: 8px;
}

.controls-panel::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.2);
  border-radius: 10px;
}

.controls-panel::-webkit-scrollbar-thumb {
  background: var(--primary-gradient);
  border-radius: 10px;
}

.controls-panel::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(135deg, #a370f7 0%, #bb86fc 100%);
}

@media (max-width: 768px) {
  .main-content {
    grid-template-columns: 1fr;
  }

  .container {
    padding: 10px;
  }
  
  header h1 {
    font-size: 2rem;
  }
}