.input-group {
    margin-bottom: var(--space-md);
}

.input-group label {
    display: block;
    margin-bottom: var(--space-xs);
    color: var(--color-primary);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-light);
}

.input-group input,
.input-group select {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-light);
    background-color: var(--color-background);
    color: var(--color-primary);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.input-group input:focus,
.input-group select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px var(--color-focus);
}

.input-group input:disabled,
.input-group select:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Sliders - works for both .input-group and .control-group */
input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--color-background);
    outline: none;
    padding: 0;
    margin-top: var(--space-xs);
    border: 1px solid var(--color-primary);
}

/* Chrome, Safari, Edge, Opera */
input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--color-primary);
    cursor: pointer;
    transition: transform var(--transition-fast);
    border: none;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

/* Firefox */
input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--color-primary);
    cursor: pointer;
    border: none;
    transition: transform var(--transition-fast);
}

input[type="range"]::-moz-range-thumb:hover {
    transform: scale(1.2);
}

input[type="range"]::-moz-range-track {
    background: var(--color-background);
    border: 1px solid var(--color-primary);
    border-radius: 3px;
    height: 6px;
}

.slider-value {
    font-size: var(--font-size-sm);
    color: var(--color-error);
    font-weight: var(--font-weight-light);
    margin-bottom: var(--space-xs);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-family: var(--font-family);
    font-weight: var(--font-weight-light);
    text-decoration: none;
    cursor: pointer;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
    border: none;
    white-space: nowrap;
}

.btn:hover,
.btn:focus {
    opacity: 0.8;
    transform: translateY(-1px);
}

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

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

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-background);
}

.btn-secondary {
    background-color: var(--color-background);
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
}

.btn-github {
    background-color: var(--color-background);
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
}

.btn-full-width {
    width: 100%;
    padding: 0.75rem var(--space-lg);
}

.tags {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.tag {
    background-color: var(--color-background);
    color: var(--color-primary);
    padding: var(--space-xs) 0.75rem;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-light);
}

.alert {
    padding: var(--space-md);
    border-radius: var(--radius-md);
    margin-top: var(--space-sm);
}

.alert-error {
    background-color: var(--color-error-bg);
    color: var(--color-error);
}

.alert-info {
    background-color: var(--color-background);
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
}

.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
    color: var(--color-primary);
}

.spinner {
    border: 3px solid var(--color-background);
    border-top: 3px solid var(--color-primary);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.divider {
    width: 100%;
    max-width: var(--max-width-hr);
    background-color: var(--color-primary);
    border-radius: 3px;
    height: 2px;
    border: none;
    margin: var(--space-3xl) auto;
}

a {
    color: inherit;
    text-decoration: none;
}

.text-link {
    text-decoration: underline;
    transition: opacity var(--transition-fast);
}

.text-link:hover,
.text-link:focus {
    opacity: 0.7;
    color: var(--color-accent);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

.text-center {
    text-align: center;
}

/* Code blocks */
pre code {
  display: block;
  font-family: 'Fira Code', 'Consolas', 'Menlo', monospace;
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--text-primary);
  background: var(--surface-elevated);
  padding: 1rem 1.25rem;
  border-radius: var(--radius-xl);
  overflow-x: auto;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  white-space: pre;
}

/* Wrapper with optional header label */
.code-block {
  margin: 1.5rem 0;
}

.code-header {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: var(--surface-muted);
  color: var(--text-dim);
  padding: 0.4rem 1rem;
  border-top-left-radius: var(--radius-xl);
  border-top-right-radius: var(--radius-xl);
  border-bottom: 1px solid var(--border-color);
}

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-sm); }
.mb-2 { margin-bottom: var(--space-md); }
.mb-3 { margin-bottom: var(--space-lg); }
.mb-4 { margin-bottom: var(--space-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-sm); }
.mt-2 { margin-top: var(--space-md); }
.mt-3 { margin-top: var(--space-lg); }
.mt-4 { margin-top: var(--space-xl); }