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

html,
body {
  max-width: 100vw;
  overflow-x: hidden;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
    sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
  min-height: 100vh;
  color: #e5e7eb;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

.card {
  background: #1f2937;
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
  margin-bottom: 2rem;
  border: 1px solid #374151;
}

.title {
  font-size: 2.5rem;
  font-weight: 700;
  color: #ffffff;
  text-align: center;
  margin-bottom: 0.5rem;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.subtitle {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.8);
  text-align: center;
  margin-bottom: 2rem;
}

.section-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: #f3f4f6;
}

.tabs {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
  border-bottom: 2px solid #374151;
}

.tab {
  padding: 0.75rem 1.5rem;
  background: none;
  border: none;
  font-size: 1rem;
  font-weight: 500;
  color: #9ca3af;
  cursor: pointer;
  border-bottom: 3px solid transparent;
  transition: all 0.2s;
}

.tab:hover {
  color: #818cf8;
}

.tab.active {
  color: #818cf8;
  border-bottom-color: #818cf8;
}

.form-group {
  margin-bottom: 1.5rem;
}

.label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: #e5e7eb;
}

.input {
  width: 100%;
  padding: 0.75rem;
  border: 2px solid #374151;
  border-radius: 8px;
  font-size: 1rem;
  transition: border-color 0.2s;
  background: #111827;
  color: #e5e7eb;
}

.input:focus {
  outline: none;
  border-color: #818cf8;
}

.input::placeholder {
  color: #6b7280;
}

.file-upload {
  border: 2px dashed #4b5563;
  border-radius: 8px;
  padding: 3rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  background: #111827;
  position: relative;
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}

.file-upload.has-preview {
  padding: 1rem;
  cursor: default;
}

.file-upload:hover:not(.has-preview) {
  border-color: #818cf8;
  background: #1f2937;
}

.file-upload.dragover {
  border-color: #818cf8;
  background: #312e81;
}

.image-preview-container {
  width: 100%;
  position: relative;
}

.image-preview {
  max-width: 100%;
  max-height: 400px;
  border-radius: 8px;
  object-fit: contain;
  display: block;
  margin: 0 auto;
}

.change-image-btn {
  margin-top: 1rem;
  padding: 0.5rem 1rem;
  background: #374151;
  color: #e5e7eb;
  border: 1px solid #4b5563;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.2s;
}

.change-image-btn:hover {
  background: #4b5563;
  border-color: #6b7280;
}

.url-preview-container {
  margin-top: 1rem;
  border: 2px solid #374151;
  border-radius: 8px;
  padding: 1rem;
  background: #111827;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 200px;
}

.url-preview {
  max-width: 100%;
  max-height: 400px;
  border-radius: 8px;
  object-fit: contain;
}

.file-input {
  display: none;
}

.upload-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  color: #6b7280;
}

.upload-text {
  font-size: 1.1rem;
  color: #d1d5db;
  margin-bottom: 0.5rem;
}

.upload-hint {
  font-size: 0.9rem;
  color: #9ca3af;
}

.file-name {
  margin-top: 1rem;
  padding: 0.75rem;
  background: #312e81;
  border-radius: 6px;
  color: #a5b4fc;
  font-weight: 500;
}

.params-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.param-group {
  display: flex;
  flex-direction: column;
}

.param-label {
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 0.25rem;
  color: #d1d5db;
}

.param-input {
  padding: 0.5rem;
  border: 2px solid #374151;
  border-radius: 6px;
  font-size: 0.9rem;
  background: #111827;
  color: #e5e7eb;
}

.param-input:focus {
  outline: none;
  border-color: #818cf8;
}

.param-input::placeholder {
  color: #6b7280;
}

.param-hint {
  font-size: 0.75rem;
  color: #9ca3af;
  margin-top: 0.25rem;
}

.button {
  padding: 0.75rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  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, 0.1);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

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

.button-primary {
  background: linear-gradient(135deg, #1f2937 0%, #111827 100%);
  color: #e5e7eb;
  border: 2px solid #374151;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

.button-primary:hover {
  transform: scale(1.05) translateY(-2px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.4);
  border-color: #4b5563;
}

.button-primary:active {
  animation: jelly 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.button-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  animation: none;
}

.button-secondary {
  background: linear-gradient(135deg, #1f2937 0%, #111827 100%);
  color: #e5e7eb;
  border: 2px solid #374151;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

.button-secondary:hover {
  transform: scale(1.05) translateY(-2px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.4);
  border-color: #4b5563;
  background: linear-gradient(135deg, #374151 0%, #1f2937 100%);
}

.button-secondary:active {
  animation: jelly 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

@keyframes jelly {
  0% { transform: scale(1); }
  25% { transform: scale(0.9); }
  50% { transform: scale(1.08); }
  75% { transform: scale(0.95); }
  100% { transform: scale(1); }
}

.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 0.8s linear infinite;
}

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

.preview-container {
  margin-top: 2rem;
}

.preview-title {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: #f3f4f6;
}

.svg-preview-wrapper {
  border: 2px solid #374151;
  border-radius: 8px;
  padding: 1rem;
  background: #1f2937;
  margin-bottom: 1rem;
}

.svg-preview {
  background: #ffffff;
  border-radius: 6px;
  padding: 2rem;
  max-width: 100%;
  overflow: auto;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 200px;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.svg-preview svg {
  max-width: 100%;
  height: auto;
  background: #ffffff;
  display: block;
}

.error {
  background: #7f1d1d;
  color: #fca5a5;
  padding: 1rem;
  border-radius: 8px;
  margin-top: 1rem;
  border: 1px solid #991b1b;
}

.success {
  background: #064e3b;
  color: #6ee7b7;
  padding: 1rem;
  border-radius: 8px;
  margin-top: 1rem;
  border: 1px solid #065f46;
}

.actions {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}

/* Collapsible details styling */
.advanced-params-details summary {
  list-style: none; /* Hide default arrow */
}
.advanced-params-details summary::-webkit-details-marker {
  display: none; /* Hide default arrow in Chrome/Safari */
}
.advanced-params-details summary {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  user-select: none;
}
.advanced-params-details summary .details-icon {
  transition: transform 0.2s ease;
  display: inline-block;
  font-size: 0.8rem;
}
.advanced-params-details[open] summary .details-icon {
  transform: rotate(90deg);
}

/* Custom styling for range input to make it smooth and premium */
#param-colors {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: #374151;
  outline: none;
  cursor: pointer;
  transition: background 0.15s ease-in-out;
}

#param-colors::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #818cf8;
  cursor: pointer;
  border: 2px solid #111827;
  box-shadow: 0 0 8px rgba(129, 140, 248, 0.6);
  transition: transform 0.1s ease, background-color 0.1s ease;
}

#param-colors::-webkit-slider-thumb:hover {
  background: #a5b4fc;
  transform: scale(1.2);
}

#param-colors::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #818cf8;
  cursor: pointer;
  border: 2px solid #111827;
  box-shadow: 0 0 8px rgba(129, 140, 248, 0.6);
  transition: transform 0.1s ease, background-color 0.1s ease;
}

#param-colors::-moz-range-thumb:hover {
  background: #a5b4fc;
  transform: scale(1.2);
}

@media (max-width: 768px) {
  .container {
    padding: 1rem;
  }

  .title {
    font-size: 2rem;
  }

  .card {
    padding: 1.5rem;
  }

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

  .tabs {
    flex-wrap: wrap;
  }
}