/* Component Styles - Button */

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-family-sans);
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    user-select: none;
    -webkit-user-select: none;
}

.btn:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

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

.btn-primary:hover:not(.btn-disabled) {
    background-color: var(--color-primary-dark);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--color-gray-200);
    color: var(--text-primary);
}

.btn-secondary:hover:not(.btn-disabled) {
    background-color: var(--color-gray-300);
}

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

.btn-danger:hover:not(.btn-disabled) {
    background-color: var(--color-danger-dark);
}

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

.btn-success:hover:not(.btn-disabled) {
    background-color: var(--color-success-dark);
}

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

.btn-loading {
    pointer-events: none;
}

.btn-spinner {
    display: inline-block;
    width: 1em;
    height: 1em;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2em;
}

.btn-text {
    display: inline;
}

@media (prefers-reduced-motion: reduce) {
    .btn {
        transition: none;
    }
    
    .btn-spinner {
        animation: none;
        border-right-color: currentColor;
    }
}