/* Algorithm Playground Styles */

/* Main container */
.playground-main {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

/* Page header */
.playground-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.playground-title {
  font-size: 2.25rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 0.5rem;
}

.playground-subtitle {
  color: var(--color-text-muted);
  font-size: 1rem;
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
}

/* Playground card */
.playground-card {
  background: var(--color-surface-primary);
  border: 1px solid var(--color-border-primary);
  border-radius: 16px;
  padding: 2rem;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

/* Form groups */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 0.5rem;
}

.form-label .required {
  color: var(--color-accent-primary);
  margin-left: 2px;
}

/* Select input */
.algorithm-select {
  width: 100%;
  padding: 0.875rem 2.5rem 0.875rem 1rem;
  background: var(--color-surface-secondary);
  border: 1px solid var(--color-border-primary);
  border-radius: 10px;
  color: var(--color-text-primary);
  font-size: 0.95rem;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.3s ease;
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23c9b8a3' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 1rem;
}

.algorithm-select:focus {
  outline: none;
  border-color: var(--color-accent-primary);
  box-shadow: 0 0 0 3px rgba(201, 184, 163, 0.15);
}

.algorithm-select:hover {
  border-color: rgba(201, 184, 163, 0.5);
}

.algorithm-select option {
  background: var(--color-bg-secondary);
  color: var(--color-text-primary);
  padding: 0.75rem;
}

/* Textarea for input */
.input-textarea {
  width: 100%;
  min-height: 120px;
  padding: 1rem;
  background: var(--color-surface-secondary);
  border: 1px solid var(--color-border-primary);
  border-radius: 10px;
  color: var(--color-text-primary);
  font-size: 0.9rem;
  font-family: 'JetBrains Mono', monospace;
  resize: vertical;
  transition: all 0.3s ease;
  line-height: 1.5;
}

.input-textarea:focus {
  outline: none;
  border-color: var(--color-accent-primary);
  box-shadow: 0 0 0 3px rgba(201, 184, 163, 0.15);
}

.input-textarea::placeholder {
  color: var(--color-text-muted);
  opacity: 0.7;
}

/* Input hint */
.input-hint {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 0.5rem;
  font-style: italic;
}

/* Button group */
.button-group {
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
}

/* Buttons */
.btn-run,
.btn-clear {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.5rem;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.23, 1, 0.32, 1);
  border: none;
}

.btn-run {
  background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
  color: #000;
  flex: 1;
}

.btn-run:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(201, 184, 163, 0.3);
}

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

.btn-run:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn-clear {
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border-primary);
  color: var(--color-text-muted);
  min-width: 120px;
}

.btn-clear:hover {
  background: rgba(201, 184, 163, 0.08);
  color: var(--color-text-primary);
  border-color: var(--color-accent-primary);
}

/* Output section */
.output-section {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border-primary);
}

.output-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.output-icon {
  font-size: 1rem;
  color: var(--color-accent-primary);
}

/* Output panel */
.output-panel {
  background: var(--color-surface-secondary);
  border: 1px solid var(--color-border-primary);
  border-radius: 10px;
  padding: 1.25rem;
  min-height: 80px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.9rem;
  color: var(--color-text-primary);
  white-space: pre-wrap;
  word-wrap: break-word;
  overflow-x: auto;
  position: relative;
}

.output-panel.success {
  border-color: rgba(107, 159, 127, 0.4);
  background: rgba(107, 159, 127, 0.05);
}

.output-panel.error {
  border-color: rgba(181, 114, 111, 0.4);
  background: rgba(181, 114, 111, 0.05);
}

.output-panel.empty {
  color: var(--color-text-muted);
  font-style: italic;
}

/* Error message styling */
.error-message {
  color: var(--color-error);
}

.success-message {
  color: var(--color-success);
}

/* Result label */
.result-prefix {
  color: var(--color-accent-primary);
  font-weight: 600;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .playground-main {
    padding: 1.5rem 1rem 3rem;
  }

  .playground-title {
    font-size: 1.75rem;
  }

  .playground-card {
    padding: 1.5rem;
  }

  .button-group {
    flex-direction: column;
  }

  .btn-run,
  .btn-clear {
    width: 100%;
  }

  .btn-clear {
    min-width: auto;
  }
}

@media (max-width: 480px) {
  .playground-title {
    font-size: 1.5rem;
  }

  .playground-subtitle {
    font-size: 0.9rem;
  }

  .form-label {
    font-size: 0.85rem;
  }

  .algorithm-select,
  .input-textarea {
    font-size: 0.85rem;
  }
}

/* Focus visible styles for accessibility */
.algorithm-select:focus-visible,
.input-textarea:focus-visible,
.btn-run:focus-visible,
.btn-clear:focus-visible {
  outline: 2px solid var(--color-accent-primary);
  outline-offset: 2px;
}

/* Loading state */
.btn-run.loading {
  position: relative;
  color: transparent;
}

.btn-run.loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(201, 184, 163, 0.3);
  border-top-color: #000;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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